EN 10219-3:2020
(Main)Cold formed welded steel structural hollow sections - Part 3: Technical delivery conditions for high strength and weather resistant steels
Cold formed welded steel structural hollow sections - Part 3: Technical delivery conditions for high strength and weather resistant steels
This document specifies the technical delivery conditions for high strength and weather resistant electric welded and submerged arc welded cold formed steel structural hollow sections of circular, square, rectangular or elliptical forms and formed cold without subsequent heat treatment other than the heat treatment of the weld line.
NOTE 1 The requirements for tolerances, dimensions and sectional properties can be found in EN 10219 2.
NOTE 2 The attention of users is drawn to the fact that whilst cold formed grades in this document can have equivalent mechanical properties to hot-finished grades in EN 10210 3, the sectional properties of square and rectangular hollow sections in EN 10219 2 and EN 10210 2 are not equivalent.
NOTE 3 A range of steel grades is specified in this document and the user can select the grade most appropriate to the intended use and service conditions. The grades and mechanical properties, but not the final supply condition of cold formed hollow sections are generally comparable with those in EN 10025 3, EN 10025 4, EN 10025 5, EN 10025 6, EN 10149 2 and EN 10149 3.
Kaltgeformte geschweißte Hohlprofile für den Stahlbau - Teil 3: Technische Lieferbedingungen für höher- und wetterfeste Stähle
Dieses Dokument legt die technischen Lieferbedingungen für kaltgeformte elektrisch und unterpulvergeschweißte Hohlprofile aus höher- und wetterfesten Stählen mit kreisförmiger, quadratischer, rechteckiger oder elliptischer Form fest ohne nachfolgende Wärmebehandlung mit Ausnahme der Wärmebehandlung der Schweißnaht.
ANMERKUNG 1 Die Anforderungen an die Grenzabmaße, Maße und statischen Werte sind in EN 10219-2 festgelegt.
ANMERKUNG 2 Der Anwender wird darauf aufmerksam gemacht, dass die kaltgeformten Hohlprofile nach EN 10219-3 zwar vergleichbare mechanische Eigenschaften zu den warmgefertigten Hohlprofilen nach EN 10210-3 aufweisen können, dass aber die Maße und statischen Werte von quadratischen und rechteckigen Hohlprofilen nach EN 10210-2 und EN 10219-2 nicht vergleichbar sind.
ANMERKUNG 3 Eine Anzahl von Stahlsorten ist in dieser Norm festgelegt und der Anwender kann die geeignetste Sorte für die beabsichtigte Verwendung aussuchen. Die Sorten und die mechanischen Eigenschaften, aber nicht der Auslieferungszustand der kaltgeformten Hohlprofile sind im Allgemeinen vergleichbar mit den Sorten die in EN 10025 3, EN 10025-4, EN 10025-5, EN 10025-6, EN 10149-2 und EN 10149-3 aufgeführt sind.
Profils creux de construction en acier, soudés et formés à froid - Partie 3 : Conditions techniques de livraison des aciers à haute limite élastique et des aciers à résistance améliorée à la corrosion atmosphérique
Le présent document spécifie les conditions techniques de livraison pour les profils creux de construction formés à froid en aciers à haute limite élastique et en aciers à résistance améliorée à la corrosion atmosphérique, soudés électriquement et soudés à l’arc immergé de forme circulaire, carrée, rectangulaire ou elliptique et formés à froid sans traitement thermique ultérieur autre que le traitement thermique de la ligne de soudure.
NOTE 1 Les exigences pour les tolérances, dimensions et caractéristiques de section peuvent être trouvées dans l’EN 10219-2.
NOTE 2 L’attention des utilisateurs est attirée sur le fait que, même si les nuances formées à froid du
présent document peuvent avoir des caractéristiques mécaniques équivalentes aux nuances finies à chaud de l’EN 10210-3, les caractéristiques de section des profils creux carrés et rectangulaires de l’EN 10219-2 et de l’EN 10210-2 ne sont pas équivalentes.
NOTE 3 Une gamme de nuances d’acier est spécifiée dans le présent document, et l’utilisateur peut sélectionner la nuance la plus appropriée à l’utilisation et aux conditions de service prévues. Les nuances et caractéristiques mécaniques, mais pas l’état de livraison final des profils creux formés à froid, sont généralement comparables à celles de l’EN 10025-3, l’EN 10025-4, l’EN 10025-5, l’EN 10025-6, l’EN 10149-2 et l’EN 10149-3.
Hladno oblikovani varjeni votli konstrukcijski profili iz jekla - 3. del: Tehnični dobavni pogoji za jekla z visoko trdnostjo in vodoodporna
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2020
Hladno oblikovani varjeni votli konstrukcijski profili iz jekla - 3. del: Tehnični
dobavni pogoji za jekla z visoko trdnostjo in vodoodporna
Cold formed welded steel structural hollow sections - Part 3: Technical delivery
conditions for high strength and weather resistant steels
Kaltgeformte geschweißte Hohlprofile für den Stahlbau - Teil 3: Technische
Lieferbedingungen für Anwendungen im Maschinenbau
Profils creux de construction en acier, soudés et formés à froid - Partie 3 : Conditions
techniques de livraison pour des applications de construction mécanique
Ta slovenski standard je istoveten z: EN 10219-3:2020
ICS:
77.140.45 Nelegirana jekla Non-alloyed steels
77.140.70 Jekleni profili Steel profiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 10219-3
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 77.140.75
English Version
Cold formed welded steel structural hollow sections - Part
3: Technical delivery conditions for high strength and
weather resistant steels
Profils creux de construction en acier, soudés et formés Kaltgeformte geschweißte Hohlprofile für den Stahlbau
à froid - Partie 3 : Conditions techniques de livraison - Teil 3: Technische Lieferbedingungen für höher- und
des aciers à haute limite élastique et des aciers à wetterfeste Stähle
résistance améliorée à la corrosion atmosphérique
This European Standard was approved by CEN on 10 August 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10219-3:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 7
3.1 Terms and definitions . 7
3.2 Symbols . 8
4 Classification and designation . 8
4.1 Classification . 8
4.2 Designation. 8
5 Information to be obtained by the manufacturer . 10
5.1 Mandatory information . 10
5.2 Options . 10
5.3 Example of an order . 11
6 Manufacturing process . 11
6.1 General . 11
6.2 Steel manufacturing process . 11
6.3 Grain structure . 11
6.4 Condition of feedstock material . 11
6.5 Structural hollow section manufacturing process . 11
6.6 Delivery condition . 12
7 Requirements . 12
7.1 Chemical composition . 12
7.2 Mechanical properties . 15
7.3 Technological properties . 16
7.4 Product supply condition . 17
7.5 Non-destructive testing. 17
7.6 Tolerances and mass . 17
8 Inspection . 18
8.1 Types of inspection . 18
8.2 Types and contents of inspection documents . 18
8.3 Summary of inspection . 19
9 Frequency of testing and preparation of samples and test pieces . 20
9.1 Frequency of tests . 20
9.2 Selection and preparation of samples for product analysis . 21
9.3 Location and orientation of samples for mechanical tests . 21
9.4 Preparation of test pieces for mechanical tests . 22
10 Test methods . 22
10.1 Chemical analysis . 22
10.2 Mechanical tests . 22
10.3 Visual inspection and dimensional check . 23
10.4 Non-destructive testing. 23
10.5 Retests, sorting and reprocessing . 24
11 Marking . 24
Annex A (informative) Structural hollow sections of non-alloy quality steels - Chemical
composition and mechanical properties . 26
Annex B (normative) Structural hollow sections of normalized/normalized rolled steels -
Chemical composition and mechanical properties . 27
Annex C (normative) Structural hollow sections of thermomechanical formed steels -
Chemical composition and mechanical properties . 29
Annex D (normative) Structural hollow sections of quenched and tempered steels —
Chemical composition and mechanical properties . 34
Annex E (normative) Structural hollow sections of steels with improved atmospheric
corrosion resistance — Chemical composition and mechanical properties . 39
Annex F (normative) Location of samples and test pieces . 41
Bibliography . 43
European foreword
This document (EN 10219-3:2020) has been prepared by Technical Committee CEN/TC 459/SC 3
“Structural steels other than reinforcements”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
EN 10219 consists of the following parts:
— EN 10219-1, Cold formed welded steel structural hollow sections - Part 1: Technical delivery
conditions
— EN 10219-2, Cold formed welded steel structural hollow sections - Part 2: Tolerances, dimensions
and sectional properties
— EN 10219-3, Cold formed welded steel structural hollow sections - Part 3: Technical delivery
conditions for high strength and weather resistant steels.
It forms part of a series of standards on hollow sections together with EN 10210-1 to EN 10210-3.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1 Scope
This document specifies the technical delivery conditions for high strength and weather resistant
electric welded and submerged arc welded cold formed steel structural hollow sections of circular,
square, rectangular or elliptical forms and formed cold without subsequent heat treatment other than
the heat treatment of the weld line.
NOTE 1 The requirements for tolerances, dimensions and sectional properties can be found in EN 10219-2.
NOTE 2 The attention of users is drawn to the fact that whilst cold formed grades in this document can have
equivalent mechanical properties to hot-finished grades in EN 10210-3, the sectional properties of square and
rectangular hollow sections in EN 10219-2 and EN 10210-2 are not equivalent.
NOTE 3 A range of steel grades is specified in this document and the user can select the grade most appropriate
to the intended use and service conditions. The grades and mechanical properties, but not the final supply
condition of cold formed hollow sections are generally comparable with those in EN 10025-3, EN 10025-4,
EN 10025-5, EN 10025-6, EN 10149-2 and EN 10149-3.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1011-1, Welding - Recommendations for welding of metallic materials - Part 1: General guidance for
arc welding
EN 1011-2, Welding - Recommendations for welding of metallic materials - Part 2: Arc welding of ferritic
steels
EN 10020, Definition and classification of grades of steel
EN 10021, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steels - Part 1: Steel names
EN 10027-2, Designation systems for steels - Part 2: Numerical system
EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection
method)
EN 10168, Steel products - Inspection documents - List of information and description
EN 10204, Metallic products - Types of inspection documents
EN 10219-1, Cold formed welded structural hollow sections of non-alloy and fine grain steels - Part 1:
Technical delivery conditions
EN 10219-2, Cold formed welded steel structural hollow sections - Part 2: Tolerances, dimensions and
sectional properties
CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition
EN 10266, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in
product standards
EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1)
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 643, Steels - Micrographic determination of the apparent grain size (ISO 643)
EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1)
EN ISO 4885, Ferrous materials - Heat treatments - Vocabulary (ISO 4885)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1)
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712)
EN ISO 10893-2, Non-destructive testing of steel tubes - Part 2: Automated eddy current testing of
seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (ISO
10893-2)
EN ISO 10893-3, Non-destructive testing of steel tubes - Part 3: Automated full peripheral flux leakage
testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection
of longitudinal and/or transverse imperfections (ISO 10893-3)
EN ISO 10893-6, Non-destructive testing of steel tubes - Part 6: Radiographic testing of the weld seam of
welded steel tubes for the detection of imperfections (ISO 10893-6)
EN ISO 10893-7, Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the weld
seam of welded steel tubes for the detection of imperfections (ISO 10893-7)
EN ISO 10893-8, Non-destructive testing of steel tubes - Part 8: Automated ultrasonic testing of seamless
and welded steel tubes for the detection of laminar imperfections (ISO 10893-8)
EN ISO 10893-9, Non-destructive testing of steel tubes - Part 9: Automated ultrasonic testing for the
detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes (ISO
10893-9)
EN ISO 10893-10, Non-destructive testing of steel tubes - Part 10: Automated full peripheral ultrasonic
testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal
and/or transverse imperfections (ISO 10893-10)
EN ISO 10893-11, Non-destructive testing of steel tubes - Part 11: Automated ultrasonic testing of the
weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections (ISO
10893-11)
EN ISO 14713-2:2009, Zinc coatings - Guidelines and recommendations for the protection against
corrosion of iron and steel in structures - Part 2: Hot dip galvanizing (ISO 14713-2:2009)
EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules
(ISO 15607)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure specification - Part 1: Arc welding (ISO 15609-1)
EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO
15614-1)
ISO 11484, Steel products - Employer's qualification system for non-destructive testing (NDT) personnel
SNT TC-1A, Personnel Qualification and Certification in Nondestructive Testing
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions given in EN 10020, EN 10021,
EN 10266 and EN ISO 4885 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
cold forming
process where the forming to final shape of the welded hollow section is carried out at ambient
temperature
Note 1 to entry: Circular hollow sections produced from normalized strip with a normalized weld seam and
with a cold forming ratio of D/T ≥ 20 may be classified as hot-finished hollow sections.
3.1.2
normalizing rolling for feedstock material
rolling process in which the final deformation is carried out in a certain temperature range leading to a
material condition equivalent to that obtained after normalizing so that the specified values of the
mechanical properties are retained even after subsequent normalizing
3.1.3
thermomechanical rolling for feedstock material
rolling process in which the final deformation is carried out in a certain temperature range leading to a
material condition with certain properties which cannot be achieved or repeated by heat treatment
alone
Note 1 to entry: Thermomechanical rolling can include processes with an increased cooling rate with or without
tempering including self-tempering but excluding direct quenching as well as quenching and tempering.
Note 2 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used.
3.1.4
steel with improved atmospheric corrosion resistance for feedstock material
steel in which a certain number of alloying elements has been added in order to increase its resistance
to atmospheric corrosion, by forming an auto-protective oxide layer on the base metal under the
influence of weather conditions
Note 1 to entry: Steel with improved atmospheric corrosion resistance is often called weathering steel.
Note 2 to entry: Additional information for the use of steel with improved atmospheric corrosion resistance is
given in Annex E.
3.1.5
quenching and tempering for feedstock material
process which consists of the following two steps:
— first quenching, where the steel is heated up above the Ac temperature and then rapidly cooled
down in liquids to create a process specific grain structure;
— afterwards tempering, during which the steel is heated up to a certain temperature to adjust the
desired properties and cooled down in air afterwards
3.1.6
fine grain steel
steel with fine grain structure with an equivalent index of ferritic grain size ≥ 6
Note 1 to entry: For the determination of grain sizes, see EN ISO 643.
3.1.7
hot-dip zinc coating
application of a zinc coating by immersing the prepared strip or hollow section in a molten bath
containing a zinc content of at least 98%
3.2 Symbols
For the purposes of this document, the symbols defined in EN 10266 apply.
4 Classification and designation
4.1 Classification
4.1.1 Within the grades of steels given in Annex B, C and D seven qualities N, NL, M, ML, Q, QL and QL1
are specified. These differ in respect of the carbon, sulphur and phosphorus content, low temperature
impact properties, production process, heat treatment and grain size.
In accordance with the classification system in EN 10020, all steel grades are alloy special steels.
4.1.2 Within the grades of steels given in Annex E, three qualities J0, J2 and K2 are specified. These
differ in respect of specified impact requirements and limits on values of various elements.
In accordance with the classification system in EN 10020, all steel grades in Annex E are alloy special
steels.
4.2 Designation
4.2.1 For the products covered by this document, the steel names are allocated in accordance with
EN 10027-1; the steel numbers are allocated in accordance with EN 10027-2.
4.2.2 The designation of steel hollow sections consists of:
a) the number of this document (EN 10219-3);
b) the capital letter S for structural steel;
c) the indication of the minimum specified yield strength for thicknesses ≤ 16 mm expressed in MPa;
d) further designations for either:
1) normalized/normalized rolled structural steels:
i) capital letter N to indicate normalized or normalized rolled with specified impact
properties at −20 °C (see 6.4);
ii) capital letters NL for qualities with specified impact properties at –50 °C; or
2) thermomechanical rolled structural steels:
i) capital letter M to indicate thermomechanical rolled with specified impact properties at
−20 °C (see 6.4);
ii) capital letters ML for qualities with specified impact properties at –50 °C; or
3) structural steels in the quenched and tempered condition:
i) capital letter Q to indicate the quenched and tempered condition with specified impact
properties at −20 °C (see 6.4);
ii) capital letters QL or QL1 for qualities with specified impact properties at –40 or –50 °C; or
4) steels with improved atmospheric corrosion resistance:
ii) the characters J0 for the qualities with specified impact properties at 0 °C;
ii) the characters J2 or K2 for the qualities with specified impact properties at −20 °C; and
iii) the letter W (weather) for improved atmospheric corrosion resistance; and;
e) the capital letter H to indicate hollow sections.
EXAMPLE 1 Hollow section made of structural steel (S) with a specified minimum yield strength for thickness
not greater than 16 mm of 460 MPa, quenched and tempered condition (Q), with a minimum impact energy value
of 30 J at −20 °C, hollow section (H):
EN 10219-3 — S460QH
or
EN 10219-3 — 1.8608
EXAMPLE 2 Hollow section made of structural steel (S) with a specified minimum yield strength for thickness
not greater than 16 mm of 355 MPa, with a minimum impact energy value of 27 J at −20 °C (J2), weather resistant
steel (W), hollow section (H):
EN 10219-3 — S355J2WH
or
EN 10219-3 — 1.8645
5 Information to be obtained by the manufacturer
5.1 Mandatory information
The following information shall be contained in the order document at the time of enquiry and order:
a) the quantity (mass or total length);
b) details of the product form:
1) CFCHS = cold formed circular hollow section;
2) CFRHS = cold formed square or rectangular hollow section;
3) CFEHS = cold formed elliptical hollow section;
c) the name of the standard for dimensions and tolerances (EN 10219-2);
d) the dimensions and the type of length, length range or length (see EN 10219-2);
e) the steel designation (see 4.2).
5.2 Options
A number of options are specified in EN 10219-2 and this document. These are listed below with
appropriate clause references. In the event that the purchaser does not indicate a wish to implement
any of these options at the time of enquiry and order, the hollow sections shall be supplied in
accordance with the basic specification.
3.1 Internal weld bead trimmed (see 6.5.2);
3.2 Other surface condition than as rolled (see 6.6);
3.3 Product analysis (see 7.1.1);
3.4 Empty;
3.5 Tensile test in corner region (see 7.2.1);
3.6 Impact test in corner region (see 7.2.2);
3.7 Verification of impact properties for quality J0 (see 7.2.3);
3.8 The product shall have a chemical composition suitable for hot-dip-zinc coating (see 7.3.2);
3.9 Weld repairs to the body of structural steel hollow sections are permitted (see 7.4.4);
3.10 Full peripheral NDT (non-destructive testing) of the circular tube for imperfections – not
possible for elliptical, rectangular, square and SAW (submerged arc welded) hollow sections (see
7.5);
3.11 Ultrasonic testing for laminar imperfections (see 7.5);
3.12 Inspection certificate 3.1 for steel grade S355J0WH of Annex E instead of a test report 2.2 (see
8.1);
3.13 Inspection certificate 3.2.
5.3 Example of an order
10 t cold formed welded square hollow sections in accordance with EN 10219-2 with specified outside
dimensions 100 mm × 100 mm and wall thickness of 8 mm of 12 m approximate lengths, grade S460QH
according to this document and chemical composition for hot-dip zinc coating (Option 3.8) and supplied
with inspection certificate 3.1:
EXAMPLE 10 t – CFRHS – EN 10219-2 — 100 × 100 × 8 – approximate length 12 m
EN 10219-3 — S460QH – Option 3.8
6 Manufacturing process
6.1 General
Structural welded cold formed hollow sections of normalized/normalized rolled, thermomechanical
rolled and quenched and tempered steels shall conform to Annexes B to D and steels with improved
atmospheric corrosion resistance shall conform to the requirements of Annex E.
In addition, the general technical delivery requirements specified in EN 10021 shall apply.
6.2 Steel manufacturing process
6.2.1 The steel manufacturing process shall be at the discretion of the hollow section manufacturer
with the exception that the open hearth (Siemens-Martin) process shall not be employed.
6.2.2 The method of deoxidation shall be as specified in Tables B.1, C.1, D.1 and E.1.
6.3 Grain structure
The steel grades given in Annexes B to D shall have a ferritic grain size equal to or finer than 6 when
measured in accordance with EN ISO 643 (see 7.2.4).
6.4 Condition of feedstock material
According to the designation given in the order the following delivery conditions apply for the feedstock
material used for the manufacture of cold formed hollow sections:
— normalized/normalized rolled for steels of qualities N and NL according to Annex B;
— thermomechanical rolled for steels of quality M and ML according to Annex C;
— quenched and tempered for steels of qualities Q, QL and QL1 according to Annex D;
— as rolled or normalized/normalized rolled or thermomechanical formed for steels with improved
atmospheric corrosion resistance W according to Annex E.
6.5 Structural hollow section manufacturing process
6.5.1 Structural hollow sections shall be manufactured by electric welding or submerged arc welding
without subsequent heat treatment (see 6.6). Hollow sections manufactured by a continuous process
shall not include the welds used to join the lengths of strip prior to forming the hollow section, except
that for helically welded submerged arc-welded (SAW) hollow sections, such welds shall be permitted
when tested in accordance with 10.4.3.
6.5.2 Electric welded hollow sections shall be supplied with the external weld bead trimmed to an
essentially flush condition. Trimming of the internal weld bead is at the discretion of the manufacturer
unless Option 1.1 is specified.
Option 3.1 Electric welded hollow sections shall be supplied with the internal weld bead trimmed, the
maximum height of the internal weld bead after trimming shall be agreed at the time of enquiry and
order.
6.5.3 All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel
authorized to operate by the employer.
The qualification shall be in accordance with ISO 11484 or SNT TC-1A or EN ISO 9712.
It is recommended that the level 3 personnel be certified in accordance with EN ISO 9712 or ASNT.
The operating authorization issued by the employer shall be in accordance with a written procedure.
NDT operations shall be authorized by a level 3 NDT individual approved by the employer.
NOTE The definition of levels 1, 2 and 3 can be found in the appropriate standards, e.g. EN ISO 9712 and
ISO 11484.
6.6 Delivery condition
The hollow sections shall be delivered cold formed without subsequent heat treatment except that the
weld seam may be in the as welded or heat treated condition.
NOTE For SAW hollow sections, it could be necessary to perform a warm shaping operation, which does not
affect the mechanical properties, in order to meet the out-of-roundness tolerance requirements.
The surface of the hollow sections shall be typical of the feedstock employed and manufacturing
method used.
Option 3.2 Other possible surface conditions are:
a) S2 pickled feedstock;
b) S3 pickled hollow section;
c) S4 hot-dip-zinc coated feedstock;
d) S5 hot-dip-zinc coated hollow section (There shall also be an agreement on the coating of the weld
seam).
7 Requirements
7.1 Chemical composition
7.1.1 The chemical composition determined by the cast analysis and reported by the steel producer
shall comply with the requirements given in Tables B.1, C.1, D.1 or E.1.
The maximum carbon equivalent value (CEV) for all grades, based on the cast analyses, given in Tables
B.2, C.2, D.2 or E.2 shall apply.
When determining the CEV, the following formula of the International Institute of Welding (IIW) shall
be used:
Mn Cr++Mo V Ni+ Cu
CEV=C+ + +
6 5 15
In addition to the cast analysis, the following option can be specified by the purchaser at the time of
enquiry and order:
Option 3.3 For products supplied with specific inspection and testing, a product analysis shall be
reported.
Deviations of the product analysis from the specified limits of the cast analysis shall be in accordance
with Table 1.
7.1.2 When products are supplied with a control on Si e.g. for hot-dip zinc-coating there could be a
need, for certain grades and thicknesses, to increase the content of other elements such as C and Mn, to
achieve the required mechanical properties. In such cases, the maximum carbon equivalent values of
Table B.2 to Table E.2 may be increased as follows:
— for Si ≤ 0,04 %, increase the value of the CEV by 0,02;
— for Si ≤ 0,25 %, increase the value of the CEV by 0,01.
Table 1 — Permissible deviations of the product analysis from the specified limits of the cast
analysis given in Tables B.1, C.1, D.1 and E.1
Permissible deviation of the
Permissible maximum content in the cast
Element product analysis from specified
analysis
limits for the cast analysis
% by mass % by mass
≤ 0,20 + 0,02
C
> 0,20 + 0,03
≤ 0,60 + 0,05
Si
> 0,60 + 0,06
normalized ≤ 1,70 – 0,05 / + 0,10
thermomechanical rolled ≤ 2,20 + 0,10
Mn
quenched and tempered ≤ 1,70 + 0,10
weather ≤ 1,50 – 0,05 / + 0,10
normalized/thermomechanical rolled ≤ 0,030,
+ 0,005
quenched and tempered ≤ 0,025
P
weather ≤ 0,035 + 0,010
normalized/ thermomechanical rolled ≤ 0,025 + 0,005
S quenched and tempered ≤ 0,015 + 0,002
weather ≤ 0,035 + 0,010
Nb ≤ 0,060 + 0,010
V ≤ 0,20 + 0,02
≤ 0,03 + 0,01
Ti
> 0,03 + 0,02
≤ 0,30 + 0,05
Cr
> 0,30 + 0,10
≤ 0,80 + 0,05
Ni
> 0,80 + 0,10
≤ 0,10 + 0,03
Mo
> 0,10 + 0,04
normalized/thermomechanical rolled,
±0,04
weather ≤ 0,35
Cu normalized/thermomechanical rolled, weather
+ 0,07
0,35 < Cu ≤ 0,55
quenched and tempered ≤ 0,50 + 0,05
normalized/thermomechanical rolled,
+ 0,002
weather ≤ 0,025
N
quenched and tempered ≤ 0,020 + 0,001
Al
≥ 0,020 – 0,005
total
B ≤ 0,005 0 + 0,000 5
Zr ≤ 0,15 + 0,02
7.2 Mechanical properties
7.2.1 Under the inspection and testing conditions as specified in Clause 8 and in the delivery
condition as specified in 6.5, the mechanical properties of the finished hollow section shall conform to
the relevant requirements of Tables B.3, B.4, C.3, C.4, D.3, D.4 or E.3.
Any heat treatment at more than 580 °C and any heat treatment not processed in the normalizing
temperature range could result in a reduction in the mechanical properties and is therefore not
recommended.
NOTE Flame straightening can be applied in accordance with CEN/TR 10347.
The following option can be specified by the purchaser at the time of enquiry and order:
Option 3.5 Longitudinal test pieces for the tensile test shall be taken from the centre of the corner, but
remote from the weld (see Annex F).
7.2.2 Another temperature as given in the Tables B.4, C.4, D.4 and E.3 may be agreed at the time of the
order.
If a Charpy test is performed at a lower temperature than specified in the document and the impact
energy values obtained meet the requirements at the higher temperature, then the material is deemed
to conform to the document.
The following option can be specified by the purchaser at the time of enquiry and order:
Option 3.6 Longitudinal test pieces for the impact test shall be taken from the centre of the corner but
remote from the weld with the notch orientated through the material thickness.
7.2.3 Subject to limitations to 7.2.2:
a) the impact properties of structural hollow sections of steel qualities J2, K2, N, NL, M, ML, Q, QL and
QL1 shall be verified;
b) the impact properties of structural hollow sections of steel quality J0 need not be verified unless
Option 3.7 is specified by the purchaser at the time of enquiry and order.
Option 3.7 For products in quality J0 supplied with specific inspection and testing (see Options 3.12
and 3.13), the verification of the impact properties is specified.
7.2.4 The following requirement for fine grain steel hollow sections can be specified:
— For fine grain steel hollow sections in thicknesses which do not permit impact test pieces of
width ≥ 5 mm to be taken, the ferritic grain size (see 6.3) shall be verified by the method as
described in EN ISO 643.
— When aluminium is used as the grain refining element, the grain size requirement shall be deemed
to be fulfilled if the cast analysis shows the aluminium content to be ≥ 0,020 % total aluminium or
alternatively ≥ 0,015 % soluble aluminium. In these cases, verification of the grain size is not
required.
7.3 Technological properties
7.3.1 Weldability
The steels specified in this document are weldable as given in Annexes B to E. General requirements for
welding the products in accordance with this document are given in EN 1011-1 and EN 1011-2.
NOTE 1 When welding hollow sections, as product thickness, strength level and CEV increase, the occurrence
of cold cracking in the welded zone forms the main risk. Cold cracking is caused by a combination of the following
factors:
— high levels of diffusible hydrogen in the weld metal;
— a brittle structure in the heat affected zone;
— significant tensile stress concentrations in the welded joint.
NOTE 2 By using guidelines, specified for example in EN 1011-1, EN 1011-2 or any other relevant welding
standard, the recommended welding conditions and the various welding ranges for the steel grades can be
determined. These will vary depending on the product thickness, the applied welding energy, the design
requirements, the electrode efficiency, the welding process and the weld metal properties.
Care should be taken when welding in corner regions of cold formed hollow sections. Eurocode 3
(EN 1993-1-8:2005, Table 4.2) includes conditions and restrictions for welding within 5t of the corner
of cold formed square and rectangular hollow sections. For steel qualities J2H, K2H, MH, MLH, NH, NLH,
where these limits are not satisfied, welding within 5t of the corner may be permitted, for products of
nominal thickness not exceeding 12,5 mm, subject to their meeting specific analysis of C < = 0,18 %,
P < = 0,020 % and S < = 0,012 %. For more information, refer to EN 1993-1-8:2005, Table 4.2 and see
below.
7.3.2 Hot-dip-zinc coating
EN ISO 1461 should be used to specify coating requirements. EN ISO 14713-2 provides further
guidance, including information on the influence of various factors, including steel chemical
composition, on the coating formation.
Option 3.8 can be used to order steels with a chemical composition required for hot-dip-zinc coating.
When Option 3.8 is implemented, the purchaser and manufacturer shall agree a steel composition (cast
analysis) of silicon and phosphorous according to either:
— Category A (or steels satisfying the formula Si ≤ 0,03 % and Si + 2,5 P ≤ 0,09 %); or
— Category B (limited to 0,14 % ≤ Si ≤ 0,25 %); or
— Category D (limited to 0,25 % < Si ≤ 0,35 %);
with required values as cited by the ranges given in EN ISO 14713-2:2009, Table 1, column 2.
Option 3.8 The chemical composition shall be suitable for hot dip zinc coating. If no additional
information is given, the delivered category is at the discretion of the manufacturer.
NOTE EN ISO 14713-2:2009, Table 1 gives guidance on typical coating characteristics on the basis of the
surface composition of silicon and phosphorous associated with certain steel compositions.
The maximum carbon equivalent shall be increased by 0,02 or by 0,01 (see 7.1.2).
7.4 Product supply condition
7.4.1 The hollow sections shall have a smooth surface corresponding to the manufacturing method
used; bumps, cavities or shallow longitudinal grooves resulting from the manufacturing process are
permissible, provided the remaining thickness is within tolerance, see EN 10219-2.
Surface imperfections may be removed by the manufacturer by grinding, provided that the thickness of
the hollow section after the repair is not less than the minimum permissible thickness in accordance
with EN 10219-2.
7.4.2 The ends of the hollow section shall be cut nominally square to the axis of the product.
7.4.3 Repair of the weld shall not be permitted for cold formed hollow sections except in the case of
submerged arc welds.
7.4.4 For hollow sections repair of the body by welding shall not be permitted unless otherwise
specified. The conditions under which, and the extent to which, welding repair to the body may be
carried out shall be agreed between the manufacturer and the purchaser.
Option 3.9 Weld repairs to the body of structural steel hollow sections are permitted.
7.4.5 Any permitted weld repairs shall be carried out by operators qualified in accordance with
EN ISO 9606-1. Welding repair procedures shall be issued in a written form and qualified in accordance
with EN ISO 15607, EN ISO 15609-1 and EN ISO 15614-1.
A hollow section repaired in this way shall be considered to meet all the requirements of this document.
7.4.6 For SAW helical hollow sections where strip/plate was joined together these butt welds shall be
carried out by operators qualified in accordance with EN ISO 9606-1. Welding procedures shall be
issued in a written form and qualified in accordance with EN ISO 15614-1.
7.5 Non-destructive testing
The seam weld of all welded hollow sections supplied with specific inspection and testing shall be
subjected to an applicable non-destructive test in accordance with 10.4.1 to 10.4.3.
Option 3.10 If agreed at the time of enquiry and order, every circular hollow section shall be full
peripheral NDT-tested for imperfections according to one of the following standards: EN ISO 10893-2,
EN ISO 10893-3 or EN ISO 10893-10 (see 10.4.4).
NOTE Full peripheral NDT is not possible for elliptical, square and rectangular SAW hollow sections.
Option 3.11 If agreed at the time of enquiry and order, every circular hollow section shall be tested for
laminar imperfections according to EN ISO 10893-8 or testing is also possible prior to welding
according to EN ISO 10893-9 or EN 10160 (see 10.4.5).
7.6 Tolerances and mass
7.6.1 Tolerances of dimensions and shape shall be as specified in EN 10219-2.
7.6.2 A density value of 7,85 kg/dm shall be used in mass calculations.
NOTE Dimensions, sectional properties and mass per unit length for a limited range of sizes of cold formed
structural hollow sections are given in EN 10219-2. The purchaser will preferably select hollow section
dimensions from this limited range of sizes.
8 Inspection
8.1 Types of inspection
Products complying with this document shall in accordance with EN 10021 be ordered and delivered
with an inspection document 2.2, 3.1 or 3.2 as specified in EN 10204. A test report 2.2 for steel grade
S355J0WH of Annex E and an inspection certificate 3.1 for all other steel grades of Annexes B to E shall
be issued.
Option 3.12 An inspection certificate 3.1 for steel grade S355J0WH of Annex E shall be issued if agreed
at the time of enquiry and order.
Option 3.13 An inspection certificate 3.2 shall be issued if agreed at
...
SLOVENSKI STANDARD
01-november-2020
Hladno oblikovani varjeni votli konstrukcijski profili iz jekla - 3. del: Tehnični
dobavni pogoji za jekla z visoko trdnostjo in vodoodporna
Cold formed welded steel structural hollow sections - Part 3: Technical delivery
conditions for high strength and weather resistant steels
Kaltgeformte geschweißte Hohlprofile für den Stahlbau - Teil 3: Technische
Lieferbedingungen für Anwendungen im Maschinenbau
Profils creux de construction en acier, soudés et formés à froid - Partie 3 : Conditions
techniques de livraison pour des applications de construction mécanique
Ta slovenski standard je istoveten z: EN 10219-3:2020
ICS:
77.140.45 Nelegirana jekla Non-alloyed steels
77.140.70 Jekleni profili Steel profiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 10219-3
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 77.140.75
English Version
Cold formed welded steel structural hollow sections - Part
3: Technical delivery conditions for high strength and
weather resistant steels
Profils creux de construction en acier, soudés et formés Kaltgeformte geschweißte Hohlprofile für den Stahlbau
à froid - Partie 3 : Conditions techniques de livraison - Teil 3: Technische Lieferbedingungen für höher- und
des aciers à haute limite élastique et des aciers à wetterfeste Stähle
résistance améliorée à la corrosion atmosphérique
This European Standard was approved by CEN on 10 August 2020.
This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 23 September 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10219-3:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 7
3.1 Terms and definitions . 7
3.2 Symbols . 8
4 Classification and designation . 8
4.1 Classification . 8
4.2 Designation. 8
5 Information to be obtained by the manufacturer . 10
5.1 Mandatory information . 10
5.2 Options . 10
5.3 Example of an order . 11
6 Manufacturing process . 11
6.1 General . 11
6.2 Steel manufacturing process . 11
6.3 Grain structure . 11
6.4 Condition of feedstock material . 11
6.5 Structural hollow section manufacturing process . 11
6.6 Delivery condition . 12
7 Requirements . 12
7.1 Chemical composition . 12
7.2 Mechanical properties . 15
7.3 Technological properties . 16
7.4 Product supply condition . 17
7.5 Non-destructive testing. 17
7.6 Tolerances and mass . 17
8 Inspection . 18
8.1 Types of inspection . 18
8.2 Types and contents of inspection documents . 18
8.3 Summary of inspection . 19
9 Frequency of testing and preparation of samples and test pieces . 20
9.1 Frequency of tests . 20
9.2 Selection and preparation of samples for product analysis . 21
9.3 Location and orientation of samples for mechanical tests . 21
9.4 Preparation of test pieces for mechanical tests . 22
10 Test methods . 22
10.1 Chemical analysis . 22
10.2 Mechanical tests . 22
10.3 Visual inspection and dimensional check . 23
10.4 Non-destructive testing. 23
10.5 Retests, sorting and reprocessing . 24
11 Marking . 24
Annex A (informative) Structural hollow sections of non-alloy quality steels - Chemical
composition and mechanical properties . 26
Annex B (normative) Structural hollow sections of normalized/normalized rolled steels -
Chemical composition and mechanical properties . 27
Annex C (normative) Structural hollow sections of thermomechanical formed steels -
Chemical composition and mechanical properties . 29
Annex D (normative) Structural hollow sections of quenched and tempered steels —
Chemical composition and mechanical properties . 34
Annex E (normative) Structural hollow sections of steels with improved atmospheric
corrosion resistance — Chemical composition and mechanical properties . 39
Annex F (normative) Location of samples and test pieces . 41
Bibliography . 43
European foreword
This document (EN 10219-3:2020) has been prepared by Technical Committee CEN/TC 459/SC 3
“Structural steels other than reinforcements”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
EN 10219 consists of the following parts:
— EN 10219-1, Cold formed welded steel structural hollow sections - Part 1: Technical delivery
conditions
— EN 10219-2, Cold formed welded steel structural hollow sections - Part 2: Tolerances, dimensions
and sectional properties
— EN 10219-3, Cold formed welded steel structural hollow sections - Part 3: Technical delivery
conditions for high strength and weather resistant steels.
It forms part of a series of standards on hollow sections together with EN 10210-1 to EN 10210-3.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1 Scope
This document specifies the technical delivery conditions for high strength and weather resistant
electric welded and submerged arc welded cold formed steel structural hollow sections of circular,
square, rectangular or elliptical forms and formed cold without subsequent heat treatment other than
the heat treatment of the weld line.
NOTE 1 The requirements for tolerances, dimensions and sectional properties can be found in EN 10219-2.
NOTE 2 The attention of users is drawn to the fact that whilst cold formed grades in this document can have
equivalent mechanical properties to hot-finished grades in EN 10210-3, the sectional properties of square and
rectangular hollow sections in EN 10219-2 and EN 10210-2 are not equivalent.
NOTE 3 A range of steel grades is specified in this document and the user can select the grade most appropriate
to the intended use and service conditions. The grades and mechanical properties, but not the final supply
condition of cold formed hollow sections are generally comparable with those in EN 10025-3, EN 10025-4,
EN 10025-5, EN 10025-6, EN 10149-2 and EN 10149-3.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1011-1, Welding - Recommendations for welding of metallic materials - Part 1: General guidance for
arc welding
EN 1011-2, Welding - Recommendations for welding of metallic materials - Part 2: Arc welding of ferritic
steels
EN 10020, Definition and classification of grades of steel
EN 10021, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steels - Part 1: Steel names
EN 10027-2, Designation systems for steels - Part 2: Numerical system
EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection
method)
EN 10168, Steel products - Inspection documents - List of information and description
EN 10204, Metallic products - Types of inspection documents
EN 10219-1, Cold formed welded structural hollow sections of non-alloy and fine grain steels - Part 1:
Technical delivery conditions
EN 10219-2, Cold formed welded steel structural hollow sections - Part 2: Tolerances, dimensions and
sectional properties
CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition
EN 10266, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in
product standards
EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1)
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 643, Steels - Micrographic determination of the apparent grain size (ISO 643)
EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1)
EN ISO 4885, Ferrous materials - Heat treatments - Vocabulary (ISO 4885)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1)
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712)
EN ISO 10893-2, Non-destructive testing of steel tubes - Part 2: Automated eddy current testing of
seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections (ISO
10893-2)
EN ISO 10893-3, Non-destructive testing of steel tubes - Part 3: Automated full peripheral flux leakage
testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection
of longitudinal and/or transverse imperfections (ISO 10893-3)
EN ISO 10893-6, Non-destructive testing of steel tubes - Part 6: Radiographic testing of the weld seam of
welded steel tubes for the detection of imperfections (ISO 10893-6)
EN ISO 10893-7, Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the weld
seam of welded steel tubes for the detection of imperfections (ISO 10893-7)
EN ISO 10893-8, Non-destructive testing of steel tubes - Part 8: Automated ultrasonic testing of seamless
and welded steel tubes for the detection of laminar imperfections (ISO 10893-8)
EN ISO 10893-9, Non-destructive testing of steel tubes - Part 9: Automated ultrasonic testing for the
detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes (ISO
10893-9)
EN ISO 10893-10, Non-destructive testing of steel tubes - Part 10: Automated full peripheral ultrasonic
testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal
and/or transverse imperfections (ISO 10893-10)
EN ISO 10893-11, Non-destructive testing of steel tubes - Part 11: Automated ultrasonic testing of the
weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections (ISO
10893-11)
EN ISO 14713-2:2009, Zinc coatings - Guidelines and recommendations for the protection against
corrosion of iron and steel in structures - Part 2: Hot dip galvanizing (ISO 14713-2:2009)
EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules
(ISO 15607)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure specification - Part 1: Arc welding (ISO 15609-1)
EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO
15614-1)
ISO 11484, Steel products - Employer's qualification system for non-destructive testing (NDT) personnel
SNT TC-1A, Personnel Qualification and Certification in Nondestructive Testing
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions given in EN 10020, EN 10021,
EN 10266 and EN ISO 4885 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
cold forming
process where the forming to final shape of the welded hollow section is carried out at ambient
temperature
Note 1 to entry: Circular hollow sections produced from normalized strip with a normalized weld seam and
with a cold forming ratio of D/T ≥ 20 may be classified as hot-finished hollow sections.
3.1.2
normalizing rolling for feedstock material
rolling process in which the final deformation is carried out in a certain temperature range leading to a
material condition equivalent to that obtained after normalizing so that the specified values of the
mechanical properties are retained even after subsequent normalizing
3.1.3
thermomechanical rolling for feedstock material
rolling process in which the final deformation is carried out in a certain temperature range leading to a
material condition with certain properties which cannot be achieved or repeated by heat treatment
alone
Note 1 to entry: Thermomechanical rolling can include processes with an increased cooling rate with or without
tempering including self-tempering but excluding direct quenching as well as quenching and tempering.
Note 2 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used.
3.1.4
steel with improved atmospheric corrosion resistance for feedstock material
steel in which a certain number of alloying elements has been added in order to increase its resistance
to atmospheric corrosion, by forming an auto-protective oxide layer on the base metal under the
influence of weather conditions
Note 1 to entry: Steel with improved atmospheric corrosion resistance is often called weathering steel.
Note 2 to entry: Additional information for the use of steel with improved atmospheric corrosion resistance is
given in Annex E.
3.1.5
quenching and tempering for feedstock material
process which consists of the following two steps:
— first quenching, where the steel is heated up above the Ac temperature and then rapidly cooled
down in liquids to create a process specific grain structure;
— afterwards tempering, during which the steel is heated up to a certain temperature to adjust the
desired properties and cooled down in air afterwards
3.1.6
fine grain steel
steel with fine grain structure with an equivalent index of ferritic grain size ≥ 6
Note 1 to entry: For the determination of grain sizes, see EN ISO 643.
3.1.7
hot-dip zinc coating
application of a zinc coating by immersing the prepared strip or hollow section in a molten bath
containing a zinc content of at least 98%
3.2 Symbols
For the purposes of this document, the symbols defined in EN 10266 apply.
4 Classification and designation
4.1 Classification
4.1.1 Within the grades of steels given in Annex B, C and D seven qualities N, NL, M, ML, Q, QL and QL1
are specified. These differ in respect of the carbon, sulphur and phosphorus content, low temperature
impact properties, production process, heat treatment and grain size.
In accordance with the classification system in EN 10020, all steel grades are alloy special steels.
4.1.2 Within the grades of steels given in Annex E, three qualities J0, J2 and K2 are specified. These
differ in respect of specified impact requirements and limits on values of various elements.
In accordance with the classification system in EN 10020, all steel grades in Annex E are alloy special
steels.
4.2 Designation
4.2.1 For the products covered by this document, the steel names are allocated in accordance with
EN 10027-1; the steel numbers are allocated in accordance with EN 10027-2.
4.2.2 The designation of steel hollow sections consists of:
a) the number of this document (EN 10219-3);
b) the capital letter S for structural steel;
c) the indication of the minimum specified yield strength for thicknesses ≤ 16 mm expressed in MPa;
d) further designations for either:
1) normalized/normalized rolled structural steels:
i) capital letter N to indicate normalized or normalized rolled with specified impact
properties at −20 °C (see 6.4);
ii) capital letters NL for qualities with specified impact properties at –50 °C; or
2) thermomechanical rolled structural steels:
i) capital letter M to indicate thermomechanical rolled with specified impact properties at
−20 °C (see 6.4);
ii) capital letters ML for qualities with specified impact properties at –50 °C; or
3) structural steels in the quenched and tempered condition:
i) capital letter Q to indicate the quenched and tempered condition with specified impact
properties at −20 °C (see 6.4);
ii) capital letters QL or QL1 for qualities with specified impact properties at –40 or –50 °C; or
4) steels with improved atmospheric corrosion resistance:
ii) the characters J0 for the qualities with specified impact properties at 0 °C;
ii) the characters J2 or K2 for the qualities with specified impact properties at −20 °C; and
iii) the letter W (weather) for improved atmospheric corrosion resistance; and;
e) the capital letter H to indicate hollow sections.
EXAMPLE 1 Hollow section made of structural steel (S) with a specified minimum yield strength for thickness
not greater than 16 mm of 460 MPa, quenched and tempered condition (Q), with a minimum impact energy value
of 30 J at −20 °C, hollow section (H):
EN 10219-3 — S460QH
or
EN 10219-3 — 1.8608
EXAMPLE 2 Hollow section made of structural steel (S) with a specified minimum yield strength for thickness
not greater than 16 mm of 355 MPa, with a minimum impact energy value of 27 J at −20 °C (J2), weather resistant
steel (W), hollow section (H):
EN 10219-3 — S355J2WH
or
EN 10219-3 — 1.8645
5 Information to be obtained by the manufacturer
5.1 Mandatory information
The following information shall be contained in the order document at the time of enquiry and order:
a) the quantity (mass or total length);
b) details of the product form:
1) CFCHS = cold formed circular hollow section;
2) CFRHS = cold formed square or rectangular hollow section;
3) CFEHS = cold formed elliptical hollow section;
c) the name of the standard for dimensions and tolerances (EN 10219-2);
d) the dimensions and the type of length, length range or length (see EN 10219-2);
e) the steel designation (see 4.2).
5.2 Options
A number of options are specified in EN 10219-2 and this document. These are listed below with
appropriate clause references. In the event that the purchaser does not indicate a wish to implement
any of these options at the time of enquiry and order, the hollow sections shall be supplied in
accordance with the basic specification.
3.1 Internal weld bead trimmed (see 6.5.2);
3.2 Other surface condition than as rolled (see 6.6);
3.3 Product analysis (see 7.1.1);
3.4 Empty;
3.5 Tensile test in corner region (see 7.2.1);
3.6 Impact test in corner region (see 7.2.2);
3.7 Verification of impact properties for quality J0 (see 7.2.3);
3.8 The product shall have a chemical composition suitable for hot-dip-zinc coating (see 7.3.2);
3.9 Weld repairs to the body of structural steel hollow sections are permitted (see 7.4.4);
3.10 Full peripheral NDT (non-destructive testing) of the circular tube for imperfections – not
possible for elliptical, rectangular, square and SAW (submerged arc welded) hollow sections (see
7.5);
3.11 Ultrasonic testing for laminar imperfections (see 7.5);
3.12 Inspection certificate 3.1 for steel grade S355J0WH of Annex E instead of a test report 2.2 (see
8.1);
3.13 Inspection certificate 3.2.
5.3 Example of an order
10 t cold formed welded square hollow sections in accordance with EN 10219-2 with specified outside
dimensions 100 mm × 100 mm and wall thickness of 8 mm of 12 m approximate lengths, grade S460QH
according to this document and chemical composition for hot-dip zinc coating (Option 3.8) and supplied
with inspection certificate 3.1:
EXAMPLE 10 t – CFRHS – EN 10219-2 — 100 × 100 × 8 – approximate length 12 m
EN 10219-3 — S460QH – Option 3.8
6 Manufacturing process
6.1 General
Structural welded cold formed hollow sections of normalized/normalized rolled, thermomechanical
rolled and quenched and tempered steels shall conform to Annexes B to D and steels with improved
atmospheric corrosion resistance shall conform to the requirements of Annex E.
In addition, the general technical delivery requirements specified in EN 10021 shall apply.
6.2 Steel manufacturing process
6.2.1 The steel manufacturing process shall be at the discretion of the hollow section manufacturer
with the exception that the open hearth (Siemens-Martin) process shall not be employed.
6.2.2 The method of deoxidation shall be as specified in Tables B.1, C.1, D.1 and E.1.
6.3 Grain structure
The steel grades given in Annexes B to D shall have a ferritic grain size equal to or finer than 6 when
measured in accordance with EN ISO 643 (see 7.2.4).
6.4 Condition of feedstock material
According to the designation given in the order the following delivery conditions apply for the feedstock
material used for the manufacture of cold formed hollow sections:
— normalized/normalized rolled for steels of qualities N and NL according to Annex B;
— thermomechanical rolled for steels of quality M and ML according to Annex C;
— quenched and tempered for steels of qualities Q, QL and QL1 according to Annex D;
— as rolled or normalized/normalized rolled or thermomechanical formed for steels with improved
atmospheric corrosion resistance W according to Annex E.
6.5 Structural hollow section manufacturing process
6.5.1 Structural hollow sections shall be manufactured by electric welding or submerged arc welding
without subsequent heat treatment (see 6.6). Hollow sections manufactured by a continuous process
shall not include the welds used to join the lengths of strip prior to forming the hollow section, except
that for helically welded submerged arc-welded (SAW) hollow sections, such welds shall be permitted
when tested in accordance with 10.4.3.
6.5.2 Electric welded hollow sections shall be supplied with the external weld bead trimmed to an
essentially flush condition. Trimming of the internal weld bead is at the discretion of the manufacturer
unless Option 1.1 is specified.
Option 3.1 Electric welded hollow sections shall be supplied with the internal weld bead trimmed, the
maximum height of the internal weld bead after trimming shall be agreed at the time of enquiry and
order.
6.5.3 All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel
authorized to operate by the employer.
The qualification shall be in accordance with ISO 11484 or SNT TC-1A or EN ISO 9712.
It is recommended that the level 3 personnel be certified in accordance with EN ISO 9712 or ASNT.
The operating authorization issued by the employer shall be in accordance with a written procedure.
NDT operations shall be authorized by a level 3 NDT individual approved by the employer.
NOTE The definition of levels 1, 2 and 3 can be found in the appropriate standards, e.g. EN ISO 9712 and
ISO 11484.
6.6 Delivery condition
The hollow sections shall be delivered cold formed without subsequent heat treatment except that the
weld seam may be in the as welded or heat treated condition.
NOTE For SAW hollow sections, it could be necessary to perform a warm shaping operation, which does not
affect the mechanical properties, in order to meet the out-of-roundness tolerance requirements.
The surface of the hollow sections shall be typical of the feedstock employed and manufacturing
method used.
Option 3.2 Other possible surface conditions are:
a) S2 pickled feedstock;
b) S3 pickled hollow section;
c) S4 hot-dip-zinc coated feedstock;
d) S5 hot-dip-zinc coated hollow section (There shall also be an agreement on the coating of the weld
seam).
7 Requirements
7.1 Chemical composition
7.1.1 The chemical composition determined by the cast analysis and reported by the steel producer
shall comply with the requirements given in Tables B.1, C.1, D.1 or E.1.
The maximum carbon equivalent value (CEV) for all grades, based on the cast analyses, given in Tables
B.2, C.2, D.2 or E.2 shall apply.
When determining the CEV, the following formula of the International Institute of Welding (IIW) shall
be used:
Mn Cr++Mo V Ni+ Cu
CEV=C+ + +
6 5 15
In addition to the cast analysis, the following option can be specified by the purchaser at the time of
enquiry and order:
Option 3.3 For products supplied with specific inspection and testing, a product analysis shall be
reported.
Deviations of the product analysis from the specified limits of the cast analysis shall be in accordance
with Table 1.
7.1.2 When products are supplied with a control on Si e.g. for hot-dip zinc-coating there could be a
need, for certain grades and thicknesses, to increase the content of other elements such as C and Mn, to
achieve the required mechanical properties. In such cases, the maximum carbon equivalent values of
Table B.2 to Table E.2 may be increased as follows:
— for Si ≤ 0,04 %, increase the value of the CEV by 0,02;
— for Si ≤ 0,25 %, increase the value of the CEV by 0,01.
Table 1 — Permissible deviations of the product analysis from the specified limits of the cast
analysis given in Tables B.1, C.1, D.1 and E.1
Permissible deviation of the
Permissible maximum content in the cast
Element product analysis from specified
analysis
limits for the cast analysis
% by mass % by mass
≤ 0,20 + 0,02
C
> 0,20 + 0,03
≤ 0,60 + 0,05
Si
> 0,60 + 0,06
normalized ≤ 1,70 – 0,05 / + 0,10
thermomechanical rolled ≤ 2,20 + 0,10
Mn
quenched and tempered ≤ 1,70 + 0,10
weather ≤ 1,50 – 0,05 / + 0,10
normalized/thermomechanical rolled ≤ 0,030,
+ 0,005
quenched and tempered ≤ 0,025
P
weather ≤ 0,035 + 0,010
normalized/ thermomechanical rolled ≤ 0,025 + 0,005
S quenched and tempered ≤ 0,015 + 0,002
weather ≤ 0,035 + 0,010
Nb ≤ 0,060 + 0,010
V ≤ 0,20 + 0,02
≤ 0,03 + 0,01
Ti
> 0,03 + 0,02
≤ 0,30 + 0,05
Cr
> 0,30 + 0,10
≤ 0,80 + 0,05
Ni
> 0,80 + 0,10
≤ 0,10 + 0,03
Mo
> 0,10 + 0,04
normalized/thermomechanical rolled,
±0,04
weather ≤ 0,35
Cu normalized/thermomechanical rolled, weather
+ 0,07
0,35 < Cu ≤ 0,55
quenched and tempered ≤ 0,50 + 0,05
normalized/thermomechanical rolled,
+ 0,002
weather ≤ 0,025
N
quenched and tempered ≤ 0,020 + 0,001
Al
≥ 0,020 – 0,005
total
B ≤ 0,005 0 + 0,000 5
Zr ≤ 0,15 + 0,02
7.2 Mechanical properties
7.2.1 Under the inspection and testing conditions as specified in Clause 8 and in the delivery
condition as specified in 6.5, the mechanical properties of the finished hollow section shall conform to
the relevant requirements of Tables B.3, B.4, C.3, C.4, D.3, D.4 or E.3.
Any heat treatment at more than 580 °C and any heat treatment not processed in the normalizing
temperature range could result in a reduction in the mechanical properties and is therefore not
recommended.
NOTE Flame straightening can be applied in accordance with CEN/TR 10347.
The following option can be specified by the purchaser at the time of enquiry and order:
Option 3.5 Longitudinal test pieces for the tensile test shall be taken from the centre of the corner, but
remote from the weld (see Annex F).
7.2.2 Another temperature as given in the Tables B.4, C.4, D.4 and E.3 may be agreed at the time of the
order.
If a Charpy test is performed at a lower temperature than specified in the document and the impact
energy values obtained meet the requirements at the higher temperature, then the material is deemed
to conform to the document.
The following option can be specified by the purchaser at the time of enquiry and order:
Option 3.6 Longitudinal test pieces for the impact test shall be taken from the centre of the corner but
remote from the weld with the notch orientated through the material thickness.
7.2.3 Subject to limitations to 7.2.2:
a) the impact properties of structural hollow sections of steel qualities J2, K2, N, NL, M, ML, Q, QL and
QL1 shall be verified;
b) the impact properties of structural hollow sections of steel quality J0 need not be verified unless
Option 3.7 is specified by the purchaser at the time of enquiry and order.
Option 3.7 For products in quality J0 supplied with specific inspection and testing (see Options 3.12
and 3.13), the verification of the impact properties is specified.
7.2.4 The following requirement for fine grain steel hollow sections can be specified:
— For fine grain steel hollow sections in thicknesses which do not permit impact test pieces of
width ≥ 5 mm to be taken, the ferritic grain size (see 6.3) shall be verified by the method as
described in EN ISO 643.
— When aluminium is used as the grain refining element, the grain size requirement shall be deemed
to be fulfilled if the cast analysis shows the aluminium content to be ≥ 0,020 % total aluminium or
alternatively ≥ 0,015 % soluble aluminium. In these cases, verification of the grain size is not
required.
7.3 Technological properties
7.3.1 Weldability
The steels specified in this document are weldable as given in Annexes B to E. General requirements for
welding the products in accordance with this document are given in EN 1011-1 and EN 1011-2.
NOTE 1 When welding hollow sections, as product thickness, strength level and CEV increase, the occurrence
of cold cracking in the welded zone forms the main risk. Cold cracking is caused by a combination of the following
factors:
— high levels of diffusible hydrogen in the weld metal;
— a brittle structure in the heat affected zone;
— significant tensile stress concentrations in the welded joint.
NOTE 2 By using guidelines, specified for example in EN 1011-1, EN 1011-2 or any other relevant welding
standard, the recommended welding conditions and the various welding ranges for the steel grades can be
determined. These will vary depending on the product thickness, the applied welding energy, the design
requirements, the electrode efficiency, the welding process and the weld metal properties.
Care should be taken when welding in corner regions of cold formed hollow sections. Eurocode 3
(EN 1993-1-8:2005, Table 4.2) includes conditions and restrictions for welding within 5t of the corner
of cold formed square and rectangular hollow sections. For steel qualities J2H, K2H, MH, MLH, NH, NLH,
where these limits are not satisfied, welding within 5t of the corner may be permitted, for products of
nominal thickness not exceeding 12,5 mm, subject to their meeting specific analysis of C < = 0,18 %,
P < = 0,020 % and S < = 0,012 %. For more information, refer to EN 1993-1-8:2005, Table 4.2 and see
below.
7.3.2 Hot-dip-zinc coating
EN ISO 1461 should be used to specify coating requirements. EN ISO 14713-2 provides further
guidance, including information on the influence of various factors, including steel chemical
composition, on the coating formation.
Option 3.8 can be used to order steels with a chemical composition required for hot-dip-zinc coating.
When Option 3.8 is implemented, the purchaser and manufacturer shall agree a steel composition (cast
analysis) of silicon and phosphorous according to either:
— Category A (or steels satisfying the formula Si ≤ 0,03 % and Si + 2,5 P ≤ 0,09 %); or
— Category B (limited to 0,14 % ≤ Si ≤ 0,25 %); or
— Category D (limited to 0,25 % < Si ≤ 0,35 %);
with required values as cited by the ranges given in EN ISO 14713-2:2009, Table 1, column 2.
Option 3.8 The chemical composition shall be suitable for hot dip zinc coating. If no additional
information is given, the delivered category is at the discretion of the manufacturer.
NOTE EN ISO 14713-2:2009, Table 1 gives guidance on typical coating characteristics on the basis of the
surface composition of silicon and phosphorous associated with certain steel compositions.
The maximum carbon equivalent shall be increased by 0,02 or by 0,01 (see 7.1.2).
7.4 Product supply condition
7.4.1 The hollow sections shall have a smooth surface corresponding to the manufacturing method
used; bumps, cavities or shallow longitudinal grooves resulting from the manufacturing process are
permissible, provided the remaining thickness is within tolerance, see EN 10219-2.
Surface imperfections may be removed by the manufacturer by grinding, provided that the thickness of
the hollow section after the repair is not less than the minimum permissible thickness in accordance
with EN 10219-2.
7.4.2 The ends of the hollow section shall be cut nominally square to the axis of the product.
7.4.3 Repair of the weld shall not be permitted for cold formed hollow sections except in the case of
submerged arc welds.
7.4.4 For hollow sections repair of the body by welding shall not be permitted unless otherwise
specified. The conditions under which, and the extent to which, welding repair to the body may be
carried out shall be agreed between the manufacturer and the purchaser.
Option 3.9 Weld repairs to the body of structural steel hollow sections are permitted.
7.4.5 Any permitted weld repairs shall be carried out by operators qualified in accordance with
EN ISO 9606-1. Welding repair procedures shall be issued in a written form and qualified in accordance
with EN ISO 15607, EN ISO 15609-1 and EN ISO 15614-1.
A hollow section repaired in this way shall be considered to meet all the requirements of this document.
7.4.6 For SAW helical hollow sections where strip/plate was joined together these butt welds shall be
carried out by operators qualified in accordance with EN ISO 9606-1. Welding procedures shall be
issued in a written form and qualified in accordance with EN ISO 15614-1.
7.5 Non-destructive testing
The seam weld of all welded hollow sections supplied with specific inspection and testing shall be
subjected to an applicable non-destructive test in accordance with 10.4.1 to 10.4.3.
Option 3.10 If agreed at the time of enquiry and order, every circular hollow section shall be full
peripheral NDT-tested for imperfections according to one of the following standards: EN ISO 10893-2,
EN ISO 10893-3 or EN ISO 10893-10 (see 10.4.4).
NOTE Full peripheral NDT is not possible for elliptical, square and rectangular SAW hollow sections.
Option 3.11 If agreed at the time of enquiry and order, every circular hollow section shall be tested for
laminar imperfections according to EN ISO 10893-8 or testing is also possible prior to welding
according to EN ISO 10893-9 or EN 10160 (see 10.4.5).
7.6 Tolerances and mass
7.6.1 Tolerances of dimensions and shape shall be as specified in EN 10219-2.
7.6.2 A density value of 7,85 kg/dm shall be used in mass calculations.
NOTE Dimensions, sectional properties and mass per unit length for a limited range of sizes of cold formed
structural hollow sections are given in EN 10219-2. The purchaser will preferably select hollow section
dimensions from this limited range of sizes.
8 Inspection
8.1 Types of inspection
Products complying with this document shall in accordance with EN 10021 be ordered and delivered
with an inspection document 2.2, 3.1 or 3.2 as specified in EN 10204. A test report 2.2 for steel grade
S355J0WH of Annex E and an inspection certificate 3.1 for all other steel grades of Annexes B to E shall
be issued.
Option 3.12 An inspection certificate 3.1 for steel grade S355J0WH of Annex E shall be issu
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