oSIST prEN 10210-2:2016

Hot finished structural steel hollow sections - Part 2: Technical delivery conditions

This part of this European Standard specifies technical delivery conditions for hot-finished seamless, electric welded and submerged arc welded steel structural hollow sections of circular, square, rectangular or elliptical forms.
It applies to hollow sections formed hot, with or without subsequent heat treatment, or formed cold with subsequent heat treatment above 580 °C to obtain equivalent mechanical conditions to those obtained in the hot formed product.
The general conditions (product characteristics, test methods and performance criteria that apply under the Construction Products Regulations) are specified in prEN 10210-1 and the requirements for tolerances, dimensions and sectional properties in prEN 10210-3.
NOTE 1    prEN 10210-1 covers provision of the Construction Products Regulations (CPR) to fulfil European law for construction products. The technical delivery conditions are described within prEN 10210-2 in combination with Clauses 2, 3, 4, 5, 7 and 8 of prEN 10210-1.
NOTE 2   The attention of users is drawn to the fact that whilst cold formed grades in prEN 10219-2 can have equivalent mechanical properties to hot-finished grades in prEN 10210-2 the sectional properties of square and rectangular hollow sections in prEN 10210-3 and prEN 10219-3 are not equivalent.
NOTE 3   A range of material grades is specified in this standard and the user should select the grade most appropriate to the intended use and service conditions. The grades and mechanical properties of the finished hollow sections are comparable with those in EN 10025-2, EN 10025-3, EN 10025-4, EN 10025-5 and EN 10025-6.
NOTE 4   Seamless and welded hollow sections for offshore structures are covered in EN 10225.

Warmgefertigte Hohlprofile für den Stahlbau - Teil 2: Technische Lieferbedingungen

Dieser Teil der Europäischen Norm legt die technischen Lieferbedingungen für warmgefertigte nahtlose, elektrisch und unterpulvergeschweißte Hohlprofile für den Stahlbau mit runder, quadratischer, rechteckiger oder elliptischer Form fest.
Sie gilt für warmgefertigte Hohlprofile mit oder ohne nachfolgende Wärmebehandlung sowie für kaltgeformte Hohlprofile mit einer anschließenden Wärmebehandlung oberhalb von 580 °C um eine gleichwertige mechanische Beschaffenheit wie bei den warmgeformten Erzeugnissen zu erzielen.
Die allgemeinen Anforderungen (Erzeugnismerkmale, die Prüfverfahren und die Leistungskriterien entsprechend der Bauproduktenverordnung) sind in EN 10210-1 und Anforderungen bezüglich der Grenzabmaße, Maße und statischen Werte sind in EN 10210-3 festgelegt.
ANMERKUNG 1    Teil 1 dieser Norm behandelt die Vorschriften der Bauproduktenverordnung (CPR) um die europäischen Gesetze bezüglich Bauprodukte zu erfüllen. Die technischen Lieferbedingungen sind in Teil 2 beschrieben und zwar im Zusammenhang mit den Abschnitten 2, 3, 4, 5, 7 und 8 des Teils 1.
ANMERKUNG 2   Der Anwender wird darauf aufmerksam gemacht, dass die kaltgeformten Hohlprofile nach EN 10219-2 zwar vergleichbare mechanische Eigenschaften zu den warmgefertigten Hohlprofilen nach EN 10210-2 aufweisen können, dass aber die Maße und statischen Werte von quadratischen und rechteckigen Hohlprofilen nach EN 10210-3 und EN 10219-3 nicht vergleichbar sind.
ANMERKUNG 3   Eine Anzahl von Stahlsorten ist in dieser Norm festgelegt und der Anwender sollte die geeignetste Sorte für die beabsichtigte Verwendung aussuchen. Die Sorten und die mechanischen Eigenschaften der fertigen Hohlprofile sind vergleichbar mit den Sorten die in EN 10025-2, EN 10025-3, EN 10025-4, EN 10025-5 und EN 10025-6 aufgeführt sind.  
ANMERKUNG 4   Nahtlose und geschweißte Hohlprofile für Offshore-Konstruktionen werden in der Europäischen Norm EN 10225 behandelt.

Profils creux de construction finis à chaud en aciers - Partie 2 : Conditions techniques de livraison

La présente partie de cette Norme européenne spécifie les conditions techniques de livraison pour les profils creux de construction finis à chaud en aciers, sans soudure, soudés électriquement et soudés à l’arc immergé sous flux en poudre, de forme circulaire, carrée, rectangulaire ou elliptique.
Elle s’applique aux profils creux formés à chaud, avec ou sans traitement thermique ultérieur, ou formés à froid avec traitement thermique ultérieur supérieur à 580 °C afin d’obtenir un état mécanique équivalent à celui des produits formés à chaud.
Les conditions générales (caractéristiques du produit, méthodes d’essai et critères de performance qui s’appliquent dans le cadre du Règlement Produits de Construction) sont spécifiées dans la prEN 10210-1 et les exigences relatives aux tolérances, dimensions et caractéristiques du profil sont spécifiées dans la prEN 10210-3.
NOTE 1   La prEN 10210-1couvre les dispositions du Règlement Produits de Construction (RPC) permettant de satisfaire à la législation européenne sur les produits de construction. Les conditions techniques de livraison sont décrites dans la prEN 10210-2 en combinaison avec les Articles 2, 3, 4, 5, 7 et 8 de la prEN 10210-1.
NOTE 2   L’attention des utilisateurs est attirée sur le fait que, même si les nuances formées à froid de la prEN 10219-2 peuvent présenter des caractéristiques mécaniques équivalentes aux nuances finies à chaud de la prEN 10210-2, les caractéristiques de profil des profils creux carrés et rectangulaires figurant dans la prEN 10210-3 et la prEN 10219-3 ne sont pas équivalentes.
NOTE 3   Dans cette norme, est spécifiée une gamme de nuances de matériau et il convient que l’utilisateur choisisse la nuance la plus appropriée à l’utilisation prévue et aux conditions de service. Les nuances et les caractéristiques mécaniques des profils creux finis sont comparables à celles figurant dans l’EN 10025-2, l’EN 10025-3, l’EN 10025-4, l’EN 10025-5 et l’EN 10025-6.
NOTE 4   Les profils creux sans soudure et soudés destinés aux structures marines sont traités dans l'EN 10225.

Vroče izdelani votli konstrukcijski profili iz jekla - 2. del: Tehnični dobavni pogoji

General Information

• Status: Not Published
• Public Enquiry End Date: 01-Mar-2016
• ICS: 77.140.45 - Non-alloyed steels
• ICS: 77.140.70 - Steel profiles
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 22-Mar-2021
• Due Date: 27-Mar-2021
• Completion Date: 22-Mar-2021
• Ref Project: prEN 10210-1 rev - Hot finished steel structural hollow sections - Part 1: Technical delivery conditions

Relations

• Revised: SIST EN 10210-1:2006 - Hot finished structural hollow sections of non-alloy and fine grain steels - Part 1: Technical delivery conditions
• Effective Date: 01-Feb-2016
• Revised: SIST EN 10210-1:2006 - Hot finished structural hollow sections of non-alloy and fine grain steels - Part 1: Technical delivery conditions
• Effective Date: 18-Jan-2023
• Revised: SIST EN 10210-1:2006 - Hot finished structural hollow sections of non-alloy and fine grain steels - Part 1: Technical delivery conditions
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 10210-2:2016
01-februar-2016
9URþHL]GHODQLYRWOLNRQVWUXNFLMVNLSURILOLL]MHNODGHO7HKQLþQLGREDYQLSRJRML
Hot finished structural steel hollow sections - Part 2: Technical delivery conditions
Warmgefertigte Hohlprofile für den Stahlbau - Teil 2: Technische Lieferbedingungen
Profils creux de construction finis à chaud en aciers - Partie 2 : Conditions techniques de
livraison
Ta slovenski standard je istoveten z: prEN 10210-2
ICS:
77.140.45 Nelegirana jekla Non-alloyed steels
77.140.70 Jekleni profili Steel profiles
oSIST prEN 10210-2:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 10210-2:2016

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oSIST prEN 10210-2:2016


DRAFT
EUROPEAN STANDARD
prEN 10210-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2016
ICS 77.140.75 Will supersede EN 10210-1:2006
English Version

Hot finished structural steel hollow sections - Part 2:
Technical delivery conditions
Profils creux de construction finis à chaud en aciers - Warmgefertigte Hohlprofile für den Stahlbau - Teil 2:
Partie 2 : Conditions techniques de livraison Technische Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
ECISS/TC 103.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10210-2:2016 E
worldwide for CEN national Members.

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oSIST prEN 10210-2:2016
prEN 10210-2:2016 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 6
3.1 Terms and definitions . 6
3.2 Symbols . 7
4 Classification and designation . 7
4.1 Classification . 7
4.2 Designation. 7
5 Information to be obtained by the manufacturer . 9
5.1 Mandatory information . 9
5.2 Options . 9
5.3 Example of an order . 10
6 Manufacturing process . 10
6.1 General . 10
6.2 Steel manufacturing process . 10
6.3 Grain structure . 10
6.4 Structural hollow section manufacturing process . 10
6.5 Delivery condition . 11
7 Requirements . 11
7.1 Chemical composition . 11
7.2 Mechanical properties . 13
7.3 Technological properties . 14
7.4 Product supply condition . 14
7.5 Non-destructive testing. 15
7.6 Tolerances and mass . 15
8 Inspection . 15
8.1 Types of inspection . 15
8.2 Types and contents of inspection documents . 15
8.3 Summary of inspection . 16
9 Frequency of testing and preparation of samples and test pieces . 19
9.1 Frequency of tests . 19
9.2 Selection and preparation of samples for product analysis . 19
9.3 Location and orientation of samples for the mechanical tests . 19
9.4 Preparation of test pieces for mechanical tests . 19
10 Test methods . 20
10.1 Chemical analysis . 20
10.2 Mechanical tests . 20
10.3 Visual inspection and dimensional check . 20
10.4 Non-destructive testing. 20
10.5 Retests, sorting and reprocessing . 21
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11 Marking . 21
Annex A (normative) Structural hollow sections of non-alloy quality steels — Chemical
composition and mechanical properties . 22
Annex B (normative) Structural hollow sections of normalized/normalized rolled steels —
Chemical composition and mechanical properties . 24
Annex C (normative) Structural hollow sections of thermomechanical rolled steels —
Chemical composition and mechanical properties . 27
Annex D (normative) Structural hollow sections of quenched and tempered steels —
Chemical composition and mechanical properties . 32
Annex E (normative) Structural hollow sections of steels with improved atmospheric
corrosion resistance — Chemical composition and mechanical properties . 37
Annex F (normative) Location of samples and test pieces . 39
Annex G (informative) Hot finished hollow section production processes, manufacturing
routes and delivery conditions . 40
Bibliography . 42

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oSIST prEN 10210-2:2016
prEN 10210-2:2016 (E)
European foreword
This document (prEN 10210-2:2016) has been prepared by Technical Committee ECISS/TC 103
“Structural steels other than reinforcements”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10210-1:2006.
This standard consists of the following parts under the general title 'Hot finished structural steel hollow
sections:
— Part 1: General
— Part 2: Technical delivery conditions
— Part 3: Tolerances, dimensions and sectional properties
It forms part of a series of standards on hollow sections together with prEN 10219-1 to prEN 10219-3.
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1 Scope
This part of this European Standard specifies technical delivery conditions for hot-finished seamless,
electric welded and submerged arc welded steel structural hollow sections of circular, square,
rectangular or elliptical forms.
It applies to hollow sections formed hot, with or without subsequent heat treatment, or formed cold
with subsequent heat treatment above 580 °C to obtain equivalent mechanical conditions to those
obtained in the hot formed product.
The general conditions (product characteristics, test methods and performance criteria that apply
under the Construction Products Regulations) are specified in prEN 10210-1 and the requirements for
tolerances, dimensions and sectional properties in prEN 10210-3.
NOTE 1 prEN 10210-1 covers provision of the Construction Products Regulations (CPR) to fulfil European law
for construction products. The technical delivery conditions are described within prEN 10210-2 in combination
with Clauses 2, 3, 4, 5, 7 and 8 of prEN 10210-1.
NOTE 2 The attention of users is drawn to the fact that whilst cold formed grades in prEN 10219-2 can have
equivalent mechanical properties to hot-finished grades in prEN 10210-2 the sectional properties of square and
rectangular hollow sections in prEN 10210-3 and prEN 10219-3 are not equivalent.
NOTE 3 A range of material grades is specified in this standard and the user should select the grade most
appropriate to the intended use and service conditions. The grades and mechanical properties of the finished
hollow sections are comparable with those in EN 10025-2, EN 10025-3, EN 10025-4, EN 10025-5 and EN 10025-6.
NOTE 4 Seamless and welded hollow sections for offshore structures are covered in EN 10225.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 10020:2000, Definition and classification of grades of steel
EN 10021, General technical delivery conditions for steel products
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
prEN 10210-1:2016, Hot finished structural steel hollow sections - Part 1: General
prEN 10210-3, Hot finished structural steel hollow sections - Part 3: Tolerances, dimensions and sectional
properties
CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition
EN 10266:2003, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for
use in product standards
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EN ISO 643, Steels - Micrographic determination of the apparent grain size (ISO 643)
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1)
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 10893-8, 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, Zinc coatings - Guidelines and recommendations for the protection against corrosion of
iron and steel in structures - Part 2: Hot dip galvanizing (ISO 14713-2)
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
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purpose of this document, the terms and definitions given in prEN 10210-1:2016 and the
following apply.
3.1.1
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 99 %
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3.2 Symbols
For the purposes of this document, the symbols defined in EN 10266:2003 apply.
4 Classification and designation
4.1 Classification
4.1.1 Within the grades of non-alloy steels given in Annex A, four qualities JR, J0, J2 and K2 are
specified. These differ in respect of specified impact requirements, limits on values of various elements,
with particular reference to sulphur and phosphorus, and the inspection and testing requirements.
In accordance with the classification system in EN 10020, all steel grades in Annex A are non-alloy
quality steels.
4.1.2 Within the grades of steels given in Annex B, C and D eight 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, steel grades S275NH, S275NLH, S355NH and
S355NLH are non-alloy quality steels and all other steel grades are alloy special steels.
4.1.3 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 general designation of steel grades see prEN 10210-1:2016, 7.2.
4.2.2 The special designation of steel hollow sections consists of:
a) the number of this European Standard (prEN 10210-2);
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) non-alloy structural steels:
i) the capital letters JR for the qualities with specified impact properties at room temperature;
ii) the characters J0 for the qualities with specified impact properties at 0 °C; and
iii) the characters J2 or K2 for the qualities with specified impact properties at -20 °C;
or
2) normalized/normalized rolled structural steels:
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i) capital letter N to indicate normalized or normalized rolled with specified impact properties
at -20 °C (see 6.4); and
ii) capital letter NL for qualities with specified impact properties at –50 °C;
or
3) thermomechanical rolled structural steels:
i) capital letter M to indicate thermomechanical rolled with specified impact properties
at -20 °C (see 6.4); and
ii) capital letter ML for qualities with specified impact properties at –50 °C;
or
4) 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); and
ii) capital letter QL or QL1 for qualities with specified impact properties at –40 or –50 °C;
or
5) steels with improved atmospheric corrosion resistance:
i) the capital letters JR for the qualities with specified impact properties at room
temperature;
ii) the characters J0 for the qualities with specified impact properties at 0 °C;
iii) the characters J2 or K2 for the qualities with specified impact properties at -20 °C and the
letter W (weather) for improved atmospheric corrosion resistance; and
iv) the capital letter H to indicate hollow sections.
EXAMPLE 1 Hollow section made of structural steel (S) with a specified minimum yield strength for a
thickness not greater than 16 mm of 275 MPa, with a minimum impact energy value of 27 J at 0 °C (J0), hollow
section (H):
EN 10210-2 — S275H
or
EN 10210-2 — 1.0149
EXAMPLE 2 Hollow section made of structural steel (S) with a specified minimum yield strength for a
thickness not greater than 16 mm of 355 MPa, normalized condition (N), with a minimum impact energy value of
27 J at -50 °C (L), hollow section (H):
EN 10210-2 — S355NLH
or
EN 10210-2 — 1.0549
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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) HFCHS = hot finished circular hollow sections;
2) HFRHS = hot finished square or rectangular hollow sections;
3) HFEHS = hot finished elliptical hollow sections;
c) the name of the standard for dimensions and tolerances (prEN 10210-3);
d) the dimensions and the type of length, length range or length (see prEN 10210-3);
e) the steel designation (see 4.2);.
5.2 Options
A number of options are specified in parts 2 and 3 of this European Standard. Those relevant to this part
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.
2.1 Internal weld bead trimmed (see 6.4.2);
2.2 Product analysis (see 7.1.1);
2.3 Cr, Cu, Mo, Ni, Ti and V cast analysis contents to be reported for non-alloy quality steels (see
7.1.2);
2.4 Verification of impact properties for grades qualities JR and J0 (see 7.2.1);
2.5 The product shall have a chemical composition required for hot-dip-zinc coating (see 7.3.2);
2.6 Weld repairs to the body of structural steel hollow sections are permitted (see 7.4.4);
2.7 Full peripheral NDT of circular tubes for imperfections - not possible for elliptical, rectangular,
square and SAW hollow sections (see 7.5);
2.8 Ultrasonic testing for laminar imperfections (see 7.5);
2.9 Inspection certificate 3.1 for steel grades S235JRH, S275J0H, S355J0H of Annex A and S355J0WH
of Annex E instead of the test report (see 8.1);
2.10 Inspection certificate 3.2 instead of the standard document (see 8.1);
2.11 Tensile test in corner region (see 9.3);
2.12 Impact test in corner region (see 9.3).
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5.3 Example of an order
100 t hot finished square hollow section in accordance with prEN 10210-3 with specified outside
dimensions 100 mm × 100 mm and wall thickness of 8 mm of 12 m exact length, made from non-alloy
quality structural steel S355J0H according to prEN 10210-2, verified impact properties at 0 °C (Option
2.4), supplied with inspection certificate 3.1 (option 2.9) and with regulatory marking according to
prEN 10210-1:
100 t– HFRHS – prEN 10210-3 —100 × 100 × 8 – exact length 12 m
prEN 10210-2 — S355H – Options 2.4 and 2.9
6 Manufacturing process
6.1 General
Structural hot finished hollow sections of non-alloy steels shall conform to the requirements of Annex A.
Structural hot finished 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 unless in
combination with a secondary steelmaking or ladle refining process.
6.2.2 The method of deoxidation shall be as specified in Tables A.1, B.1, C.1, D.1 and E.1.
6.3 Grain structure
The fine grain steels 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 7.2.2).
6.4 Structural hollow section manufacturing process
6.4.1 Structural hollow sections shall be manufactured by a seamless or by a welding process (see
informative Annex G). Welded 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 as permitted in 10.4.3.
6.4.2 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 2.1 is specified.
Option 2.1 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.
6.4.3 All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel
authorised to operate by the employer.
The qualification shall be in accordance with ISO 11484 or, at least, an equivalent to it.
It is recommended that the level 3 personnel be certified in accordance with EN ISO 9712 or, at least, an
equivalent to it.
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The operating authorisation issued by the employer shall be in accordance with a written procedure.
NDT operations shall be authorised 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.
6.5 Delivery condition
The products shall be delivered in the conditions indicated below:
— Qualities JR, J0, J2 and K2 — hot finished,
— Qualities N and NL — full body normalized. Normalized includes normalized rolled and normalized
formed,
— Qualities M and ML – thermomechanical rolled,
— Qualities Q, QL and QL1 — quenched and tempered.
For steels of qualities JR, J0, J2, K2 of Annex A and steel of qualities N, NL of Annex B it may be necessary
for hollow sections to apply accelerated cooling after austenitizing to achieve the intended structure, or
liquid quenching and tempering to achieve the specified mechanical properties. The decision shall be
left to the discretion of the manufacturer, but shall be stated to the purchaser at the time of enquiry and
order. Hollow sections treated in such a way by quenching and tempering shall be designated by the
steel name supplemented with the symbol "+QT".
7 Requirements
7.1 Chemical composition
7.1.1 In addition to prEN 10210-1:2016, 4.1 the following option can be specified by the purchaser at
the time of enquiry and order:
Option 2.2 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 For non-alloy steel products the following option may be specified:
Option 2.3 The recording on the inspection certificate of the Cr, Cu, Mo, Ni, Ti and V content (cast
analysis).
7.1.3 When products are supplied with a control on Si e.g. for hot-dip zinc-coating so that there could
be a need to increase the content of other elements like C and Mn to achieve the required tensile
properties, the maximum carbon equivalent values of Tables A.2 to E.2 shall 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.
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oSIST prEN 10210-2:2016
prEN 10210-2:2016 (E)
Table 1 — Permissible deviations of the product analysis from the specified limits of the cast
analysis specified in Tables A.1, B.1, C.1, D.1 and E.1
Permissible deviation of the
Permissible maximum content in product analysis from
Element
the cast analysis specified limits for the cast
analysis
 % by mass % b
...