SIST EN 10225-2:2019
(Main)Weldable structural steels for fixed offshore structures - Technical delivery conditions - Part 2: Sections
Weldable structural steels for fixed offshore structures - Technical delivery conditions - Part 2: Sections
This document specifies requirements for weldable structural steels, in the form of sections (e.g. H-, I-, Z-sections, U-channels, angles and tees) excluding hollow sections, to be used in the fabrication of fixed offshore structures. The thickness limitation in this standard is up to and including 63 mm.
For steel qualities with mechanical properties in the transverse direction (named xL1O) sections with flange widths smaller than 180 mm and channels with flange widths smaller than 90 mm cannot be ordered.
Greater thicknesses may be agreed, provided the technical requirements of this European Standard are maintained.
This European Standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. design temperature.
NOTE This document has an informative Annex C on the prequalification of steels for fixed offshore structures in arctic areas.
Minimum yield strengths up to 460 MPa are specified together with impact properties at temperatures down to -40 °C.
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische Lieferbedingungen - Teil 2: Profile
Dieses Dokument legt die Anforderungen an Profile (z. B.: H-, I-, Z-, U-, T-Profile und Winkel) ausgenommen Hohlprofile aus schweißgeeigneten Baustählen fest, die zur Herstellung von feststehenden Offshore-Konstruktionen verwendet werden. Die Dickenbeschränkung in dieser Norm beträgt bis einschließlich 63 mm.
Für Stahlsorten mit mechanischen Eigenschaften in Querrichtung (Endung am Kurzname xL1O) sind Profile mit Flanschbreiten kleiner als 180 mm und U-Profile mit Flanschbreiten kleiner als 90 mm nicht bestellbar.
Größere Dicken können vereinbart werden, vorausgesetzt die technischen Lieferbedingungen dieser Europäischen Norm werden eingehalten.
Diese Europäische Norm gilt für Stähle für Offshore-Konstruktionen, die für den Offshore-Einsatz vorgesehen sind, jedoch nicht für Stähle zur Herstellung von Unterwasserpipelines, Steigleitungen (risers), Verfahrens-Ausrüstungen, Rohrsystemen und anderen Einrichtungen und Ausrüstungen. Sie gilt in erster Linie für den Bereich der Nordsee, kann jedoch auch für andere Gebiete angewendet werden, vorausgesetzt, dass die örtlichen Bedingungen, z. B. die Auslegungstemperatur, genügend berücksichtigt werden.
ANMERKUNG Dieses Dokument hat einen informativen Anhang C bezüglich einer Vorqualifizierung von Stählen für den Einsatz in arktischen Gebieten bei Offshore-Konstruktionen.
Mindestwerte der Streckgrenze bis zu 460 MPa werden zusammen mit Werten für die Kerbschlagarbeit bis herunter zu Temperaturen von -40 °C angegeben.
Aciers de construction soudables destinés à la fabrication de structures marines fixes - Conditions techniques de livraison - Partie 2 : Profilés
Le présent document spécifie les exigences applicables aux aciers de construction soudables sous la
forme de profilés (par exemple, poutrelles H, I, Z, fers U, cornières et tés) à l'exception des profilés creux,
destinés à la fabrication de structures marines fixes,. La limite d'épaisseur dans cette norme est inférieure
ou égale à 63 mm.
Pour les qualités d'acier présentant des caractéristiques mécaniques dans les profilés de direction
transversale (désigné par xL1O), il n'est pas possible de commander des profilés avec une largeur d’aile
inférieure à 180 mm et des fers U avec une largeur d’aile inférieure à 90 mm.
Des épaisseurs plus importantes peuvent être convenues, à condition que les exigences techniques de la
présente Norme européenne soient respectées.
La présente norme européenne s'applique aux aciers pour constructions marines exploitées sur le
domaine maritime européen, à l'exclusion des aciers fournis pour réaliser des oléoducs sous‐marins,
conduites montantes, équipement de procédés et autres tuyauteries de transport. Elle s’applique
prioritairement au secteur de la mer du Nord mais elle peut également s’appliquer dans d’autres zones
dans la mesure où les conditions locales sont dûment prises en compte, notamment la température de
conception.
NOTE Le présent document a une l’Annexe C informative pour la présélection des aciers destinés à la
construction de structures marines fixes dans les zones arctiques.
La présente norme spécifie les limites d’élasticité jusqu’à 460 MPa et les caractéristiques de flexion par
choc à des température jusqu’à - 40 °C.
Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni pogoji - 2. del: Profili
Ta del standarda EN 10225 določa zahteve za variva konstrukcijska jekla v obliki profilov (npr. profili H, I, Z, U, L in T), ki se uporabljajo za izdelavo konstrukcij naftnih ploščadi, z izjemo votlih profilov. Omejitev debeline v tem standardu je do vključno 63 mm.
Za jekla z mehanskimi lastnostmi v prečni smeri (imenovani xL2O) ni mogoče naročiti profilov s širino prirobnice manjšo od 180 mm in kanalov s širino prirobnice manj kot 90 mm.
Dogovori za večje debeline so mogoči, če se ohranijo tehnične zahteve tega evropskega standarda.
Standard velja za jekla za konstrukcije naftnih ploščadi, projektirane za delovanje v priobalnem območju, vendar ne za jekla, dobavljena za izdelavo podmorskih cevovodov, dvižnih cevi, procesne opreme, procesnih cevovodov in drugih sredstev. Uporablja se predvsem na območju Severnega morja, lahko pa se uporablja tudi na drugih območjih, če se ustrezno upoštevajo lokalni pogoji, npr. temperatura.
OPOMBA: Na voljo je dodatek E o predizbiri jekel za konstrukcije naftnih ploščadi v arktičnih območjih.
Minimalne napetosti tečenja do 460 MPa so določene skupaj z nizkotemperaturnimi lastnostmi pri temperaturah do –40 °C.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN 10225:2009
Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni
pogoji - 2. del: Profili
Weldable structural steels for fixed offshore structures - Technical delivery conditions -
Part 2: Sections
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische
Lieferbedingungen - Teil 2: Profile
Aciers de construction soudables destinés à la fabrication de structures marines fixes -
Conditions techniques de livraison - Partie 2 : Profilés
Ta slovenski standard je istoveten z: EN 10225-2:2019
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.70 Jekleni profili Steel profiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 10225-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 77.140.10 Supersedes EN 10225:2009
English Version
Weldable structural steels for fixed offshore structures -
Technical delivery conditions - Part 2: Sections
Aciers de construction soudables destinés à la Schweißgeeignete Baustähle für feststehende Offshore-
fabrication de structures marines fixes - Conditions Konstruktionen - Technische Lieferbedingungen - Teil
techniques de livraison - Partie 2 : Profilés 2: Profile
This European Standard was approved by CEN on 23 December 2018.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10225-2:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification and designation . 8
4.1 Classification . 8
4.2 Designation . 8
5 Information to be supplied by the purchaser . 9
5.1 Mandatory information . 9
5.2 Options . 9
5.3 Example of an order . 9
6 Manufacturing process . 9
6.1 Steel manufacturing process . 9
6.2 Qualification of personnel for NDT-activities . 10
6.3 Delivery condition . 10
6.4 Thickness limits . 10
7 Requirements . 10
7.1 General . 10
7.2 Chemical composition . 10
7.2.1 Heat analysis . 10
7.2.2 Product analysis . 10
7.2.3 Carbon equivalent values (CEV) and P . 11
cm
7.3 Mechanical properties . 11
7.3.1 General . 11
7.3.2 Through-thickness testing . 11
7.3.3 Prequalification for arctic areas . 11
7.4 Weldability data . 11
7.5 Internal soundness and non-destructive testing . 11
7.6 Surface quality . 12
7.7 Dimensions, tolerances, mass . 12
7.7.1 Dimensions and tolerances on dimensions and shape . 12
7.7.2 Mass of steel . 12
8 Inspection . 12
8.1 General . 12
8.2 Types of inspection documents . 12
8.3 Summary of inspections . 13
8.4 Intermediary supply . 13
9 Frequency of testing and preparation of samples and test pieces . 13
9.1 Frequency of test . 13
9.1.1 Chemical analysis . 13
9.1.2 Tensile test . 13
9.1.3 Impact test . 14
9.2 Selection and preparation of samples for product analysis . 14
9.3 Location of samples and orientation of tensile test pieces . 14
9.4 Location of samples and orientation of impact test pieces . 14
9.5 Preparation of test pieces for mechanical tests . 14
9.5.1 General . 14
9.5.2 Preparation of tensile test pieces . 14
9.5.3 Preparation of impact test pieces . 14
10 Test methods . 15
10.1 Chemical analysis . 15
10.2 Mechanical tests . 15
10.2.1 Test temperatures . 15
10.2.2 Tensile test . 15
10.2.3 Impact test . 15
10.3 Visual inspection and dimensional check . 16
10.4 Non-destructive tests . 16
10.4.1 General . 16
10.4.2 NDT for sections . 16
10.5 Retests, sorting and reprocessing . 16
11 Marking and bundling . 16
11.1 Die stamping, paint marking and labelling . 16
11.2 Bundling . 17
12 Options . 17
Annex A (normative when Option 1 is specified by the purchaser) Further details of steel
manufacturing procedures to be supplied by the manufacturer . 27
Annex B (normative when Option 17 is specified by the purchaser) Weldability testing and
mechanical testing of butt welds. 28
B.1 General requirements . 28
B.2 Welding processes and procedure . 28
B.3 Butt-weld requirements . 29
B.3.1 General . 29
B.3.2 Test piece dimensions. 29
B.3.3 Bevel detail . 30
B.3.4 Welding processes . 31
B.3.5 Nominal heat input. 31
B.3.6 Dehydrogenation of test pieces . 31
B.4 Mechanical testing . 31
B.4.1 General . 31
B.4.2 Charpy-V-notch impact tests . 33
B.4.3 Fracture mechanic test . 33
B.4.4 Macrohardness . 35
B.4.5 Cross-weld tensile test . 36
Annex C (informative) Prequalification of steels for offshore structures operating in arctic
areas . 42
Annex D (normative) Applicable dimensional standards . 43
Bibliography . 44
European foreword
This document (EN 10225-2:2019) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
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 November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
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.
This document, together with EN 10225-1:2019, EN 10225-3:2019, and EN 10225-4:2019, supersedes
EN 10225:2009.
This European Standard consists of the following parts, under the general title 'Weldable structural
steels for fixed offshore structures – Technical delivery conditions'.
— Part 1: Plates
— Part 2: Sections
— Part 3: Hot finished hollow sections
— Part 4: Cold formed hollow sections
In comparison to the previous edition following technical changes were made:
— split of the standard in four parts;
— the steel names were adapted to EN 10027-1;
— steel grades will no longer be delivered in the 'as rolled' condition;
— an informative Annex C was added for the prequalification of steels for fixed offshore structures in
arctic areas.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Through its subcommittee SC 3 “Structural steels other than reinforcements” (secretariat: DIN)
1 Scope
This document specifies requirements for weldable structural steels, in the form of sections (e.g. H-, I-,
Z-sections, U-channels, angles and tees) excluding hollow sections, to be used in the fabrication of fixed
offshore structures. The thickness limitation in this standard is up to and including 63 mm.
For steel qualities with mechanical properties in the transverse direction (named xL1O) sections with
flange widths smaller than 180 mm and channels with flange widths smaller than 90 mm cannot be
ordered.
Greater thicknesses may be agreed, provided the technical requirements of this European Standard are
maintained.
This European Standard is applicable to steels for offshore structures, designed to operate in the
offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process
equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may
also be applicable in other areas provided that due consideration is given to local conditions e.g. design
temperature.
NOTE This document has an informative Annex C on the prequalification of steels for fixed offshore
structures in arctic areas.
Minimum yield strengths up to 460 MPa are specified together with impact properties at temperatures
down to –40 °C.
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 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 10079, Definition of steel products
EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections
— Part 1: General requirements
EN 10163-3, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections
— Part 3: Sections
EN 10164, Steel products with improved deformation properties perpendicular to the surface of the
product — Technical delivery conditions
EN 10168, Steel products — Inspection documents — List of information and description
EN 10204, Metallic products — Types of inspection documents
CEN/TR 10261, Iron and steel — European standards for the determination of chemical composition
EN 10306, Iron and steel — Ultrasonic testing of H beams with parallel flanges and IPE beams
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 4063, Welding and allied processes — Nomenclature of processes and reference numbers (ISO
4063)
EN ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test (ISO 4136)
EN ISO 4885, Ferrous materials — Heat treatments — Vocabulary (ISO 4885)
EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1)
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO
6892-1)
EN ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel (ISO 9712)
EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition (ISO 14284)
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
ISO 12135, Metallic materials — Unified method of test for the determination of quasistatic fracture
toughness
ISO 15653, Metallic materials — Method of test for the determination of quasistatic fracture toughness of
welds
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10020, EN 10021,
EN ISO 4885, EN 10079 and EN ISO 14284 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 http://www.iso.org/obp
3.1
continuous casting process route (concast)
steel produced by a continuous casting process route
3.2
fine grain steel
steels with fine grain structure with an equivalent index of ferritic grain size ≥ 6 for steel grades with
ferritic/perlitic microstructure or with an equivalent index of former austenitic grain size ≥ 5 for steel
grades with martensitic/bainitic microstructure
Note 1 to entry: For the determination of grain sizes see EN ISO 643.
3.3
intermediary
organization that is supplied with products by the manufacturers and that then, in turn, supplies them
without further processing or after processing without changing the properties specified in the
purchase order and referenced product specification
3.4
manufacturer
organization that manufactures the respective products according to the requirements of the order and
to the properties specified in the referenced product specification to the final customer
3.5
normalized rolled
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 normalizing
Note 1 to entry: In international publications for both the normalizing rolling, as well as the thermomechanical
rolling, the expression “controlled rolling” may be found. However in view of the different applicability of the
products a distinction of the terms is necessary.
3.6
parent product
product rolled from one piece of steel
3.7
purchaser
purchaser or their representative
3.8
thermomechanical rolling
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: Hot forming or post weld heat treatment at a temperature above 580 °C may lower the strength
values and it is not recommended to be performed. Flame straightening can be applied in accordance with
CEN/TR 10347.
Note 2 to entry: Thermomechanical rolling can include processes with an increasing cooling rate with or
without tempering including self-tempering but excluding direct quenching and quenching and tempering.
Note 3 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used.
4 Classification and designation
4.1 Classification
All steel grades specified in this European Standard are classified as alloy special steels according to
EN 10020.
NOTE The steel grades in this European Standard are substantially modified from steel grades in EN 10025-2,
-3, -4 and -6.
4.2 Designation
4.2.1 For the products covered by this European Standard 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 For steels for offshore structures the steel designation consists of:
— the number of this European Standard (EN 10225-2);
— the capital letter S for structural steel;
— the indication of the minimum specified yield strength for thicknesses ≤ 16 mm expressed in MPa;
— further designations for either
— normalized rolled structural steels: capital letters NL - letter N to indicate normalized rolled,
letter L to indicate specified impact properties at –40 °C (see 6.3); or
— thermomechanical rolled structural steels: capital letters ML - letter M to indicate
thermomechanical rolled, letter L to indicate specified impact properties at –40 °C (see 6.3);
— no number or number 1:
— no number for longitudinal Charpy –V-notch impact test (test pieces are cut parallel to the
rolling direction); or
— number 1 for transverse Charpy-V-notch impact test (test pieces are cut transverse to the
rolling direction); and
— the capital letter O for offshore structures.
EXAMPLE 1 Structural steel (S) with a specified minimum yield strength for a thickness not greater than
16 mm of 355 MPa, thermomechanical rolled condition with a minimum impact energy value of 50 J at −40 °C
(longitudinal Charpy-impact test pieces), for offshore application:
EN 10225–2 — S355MLO
or
EN 10225–2 — 1.8811
NOTE For a transition period the old steel names and numbers are given in Tables 3 to 8 in brackets.
5 Information to be supplied by the purchaser
5.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) the quantity (number of sections or total length);
b) details of the product form: H-, I-, L-, T-, U- or Z-section;
c) the name of the standard for dimensions and tolerances and the dimensions and tolerances (see
Annex D);
d) the name of this standard (EN 10225-2) and the steel designation (steel name or steel number, see
4.2.2);
e) standard designation in accordance with EN 10204 for an inspection certificate 3.1 or, if required,
inspection certificate 3.2 (see also Option 24).
5.2 Options
A number of options are specified in Clause 12. In the event that the purchaser does not indicate a wish
to implement any of these options, the manufacturer shall supply in accordance with the basic
specification (see 5.1). The options in Clause 12 are numbered through all four parts of EN 10225,
therefore some options are not available for this part.
5.3 Example of an order
30 sections HEA500 with specified dimensions according to EN 10365 of 10 m length each and
tolerances according to EN 10034 made of steel S355ML0 for offshore application according to
EN 10225-2 supplied with inspection document 3.1:
30 sections HEA500 according to EN 10365, length 10 m, tolerances according to EN 10034,
EN 10225-2 — S355MLO – inspection certificate 3.1
or
30 sections HEA 500 – according to EN 10365, length 10 m, tolerances according to EN 10034,
EN 10225-2 — 1.8811 inspection certificate 3.1
6 Manufacturing process
6.1 Steel manufacturing process
The steel manufacturing process shall be at the discretion of the manufacturer with the exception that
the open hearth (Siemens-Martin) process shall not be employed.
All steels shall be fully killed.
All steels shall be made to fine grain practice.
See Option 1 (further details of steel manufacturing process)
See Option 2 (vacuum degassed and/or ladle refined)
All products shall be traceable to the cast.
6.2 Qualification of personnel for NDT-activities
All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel
authorized to carry out this work 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.
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.
6.3 Delivery condition
Sections shall be supplied in the normalized rolled (N) or thermomechanically rolled (M) condition as
shown in Tables 3 to 8.
6.4 Thickness limits
6.4.1 The maximum thickness of product from the continuous casting process shall be at the
manufacturer's discretion.
7 Requirements
7.1 General
In addition to the requirements of this European Standard, the general technical delivery requirements
specified in EN 10021 apply.
7.2 Chemical composition
7.2.1 Heat analysis
The chemical composition determined by heat analysis shall comply with the values in Tables 3 and 6.
The deliberate addition of any elements other than those listed in Tables 3 and 6 shall not be permitted.
For residual element control, Boron (B) shall not be intentionally added to steel grades up to and
including S460.
Any further restrictions in heat analysis shall be agreed between the manufacturer and the purchaser at
the time of the enquiry and order, see Option 6 (restricted heat analysis).
7.2.2 Product analysis
The chemical composition determined by product analysis shall comply with the values given in Tables
3 and 6, for verification see Option 7 (product analysis).
Any further restrictions in product analysis shall be agreed between the manufacturer and the
purchaser at the time of enquiry and order, see Options 6 and 7 (restricted product analysis).
7.2.3 Carbon equivalent values (CEV) and P
cm
CEV and P shall be calculated using the following formulae where each element is expressed as a
cm
mass percentage:
Mn Cr++Mo V Ni+ Cu
CEV=C++ +
6 5 15
(1)
Si Mn+ Cu+ Cr Ni Mo V
Pcm=C++ + + ++ 5B
30 20 60 15 10
(2)
The maximum permissible CEV and P values are given in Tables 4 and 7. Either the P or/and the
cm cm
CEV is reported at the discretion of the manufacturer, unless otherwise agreed between manufacturer
and purchaser at the time of enquiry and order. See Option 8 (agreement whether to report a P
cm
or/and CEV value).
7.3 Mechanical properties
7.3.1 General
Under the inspection and testing conditions as specified in Clauses 8, 9 and 10 the mechanical
properties at the verification test temperature shall comply with the relevant requirements given in
Tables 5 and 8.
7.3.2 Through-thickness testing
Through-thickness testing shall not be carried out, except when Option 12 is specified.
See Option 12 (through thickness testing)
7.3.3 Prequalification for arctic areas
If specified at the time of enquiry and order testing at specified lower temperatures shall be carried out.
See informative Annex C (testing at lower temperatures as prequalification for arctic areas shall be
done, e.g. for arctic area 1, 2 or 3 at −20 °C, −30 °C or −40 °C).
7.4 Weldability data
Weldability data is not required, except when option 17 is specified.
See Option 17 (weldability data, this option shall already be requested at the time of enquiry)
Regardless of the revision of the standard, weldability studies performed with a former version of
EN 10225 remains valid, provided chemical composition and mechanical properties comply with the
current version.
This data refers only to the weldability of the material being supplied and is intended for use in
development and preparation of fabrication procedures. The manufacturer does not have to fulfil the
requirements of a welding procedure qualification test (WPQT), nor provide data to it.
7.5 Internal soundness and non-destructive testing
Internal soundness for rolled sections with web thickness greater than 12 mm shall be subject to an
ultrasonic examination of webs and flanges if specified by the purchaser.
See Option 19 (Ultrasonic test)
IIW, International Institute of Welding formula
Testing of the region between the web and the flange should be subject to agreement between the
manufacturer and the purchaser.
7.6 Surface quality
All surfaces of rolled sections shall be 100 % visually inspected for defects and the surface condition
shall comply with EN 10163-1 and EN 10163-3, Class C, sub-class 2.
See Option 23 (other surface conditions according to EN 10163-3).
7.7 Dimensions, tolerances, mass
7.7.1 Dimensions and tolerances on dimensions and shape
The dimensions and tolerances of the product shall be in accordance with one of the relevant European
Standards in Annex D.
7.7.2 Mass of steel
The calculated mass shall be determined using a density of 7,85 kg/dm .
8 Inspection
8.1 General
Products complying with this European Standard shall be ordered and delivered with an inspection
certificate 3.1 or 3.2 as specified in EN 10204. The type of document shall be agreed upon at the time of
enquiry and order. If the order does not contain any specification of this type, an inspection certificate
3.1 shall be issued.
See Option 24 (inspection certificate 3.2).
8.2 Types of inspection documents
The inspection certificate 3.1 or 3.2 shall include, in accordance with EN 10168, the following codes
and/or relevant information where applicable:
A — Commercial transactions and parties involved;
B — Description of products to which the inspection certificate applies;
C01-C03 — Location of the samples, direction of test pieces and test temperature;
C10-C13 — Tensile test — Test piece shape and test results;
C40-C43 — Impact test — Test piece type and test results, if applicable;
C50-C69 — other tests if applicable (e.g. through thickness properties);
C71-C92 — Heat analysis and, if applicable, product analysis (as a minimum all the elements referred
to in Tables 3 and 6 as applicable), the CEV or the P shall be reported;
cm
D01 — statement that marking and identification, surface appearance, shape and dimensional
properties are satisfactory;
D02-D50 — if applicable, statement confirming that the NDT testing has been carried out and that the
test results are satisfactory;
D51-D99 —results on the agreed additional product tests (options);
Z — Validation.
In addition, if an inspection certificate 3.2 is ordered, the purchaser shall notify the manufacturer of the
address of the organization or person nominated by him to carry out the inspection and validate the
inspection document.
Results of weldability testing in accordance with Option 17 and Annex B shall not form any part of the
inspection document.
8.3 Summary of inspections
Table 1 — Mandatory specific inspection for structural steels for offshore structures
Inspection requirements Inspection programme
Subclause
Type of test
reference(s)
7.2 see 9.1.1
1 Heat analysis
10.1 One per cast
see 9.1.2
7.3.1
2 Tensile test One test per test unit
10.2.2
each 40 tonnes
Mandatory
see 9.1.3
tests
7.3.1 One set of test pieces per
3 Impact test
10.2.3 test unit
each 40 tonnes
Surface condition and 7.6, 7.7
4 see 10.3
dimensions 10.3
8.4 Intermediary supply
If any steel is supplied from an intermediary's stock, the intermediary shall be responsible for:
a) supplying to the purchaser a copy of the original order requirements placed on the mill and the
subsequent sales history of the product;
b) supplying to the purchaser all documentation required by this standard;
c) satisfying the purchaser by means of numbers or identification marks on the steel (or label when
parcels of sections are bundled) that such steel has been tested and complies with all the
requirements of this European Standard as applicable.
9 Frequency of testing and preparation of samples and test pieces
9.1 Frequency of test
9.1.1 Chemical analysis
The heat analysis and, if required, the product analysis (see Option 7) shall be determined once per cast.
9.1.2 Tensile test
The verification of the mechanical properties shall be carried out by test unit. A test unit comprises 40
tonnes or part thereof, of material from the same steel cast in the same heat treatment condition and of
the same thickness range for the yield strength as given in Tables 5 and 8 providing that the thickness
variation for the order quantity is not more than 5 mm above or below the thickness of the product
sample. One sample for one tensile test shall be taken from one sample product of each test unit.
9.1.3 Impact test
For the test unit see 9.1.2. One sample sufficient for 2 sets of three impact test pieces shall be taken
from one sample product of each test unit.
9.2 Selection and preparation of samples for product analysis
Samples for product analysis, if required, shall be taken from the sample product or alternatively from
test pieces used for mechanical testing or from the full thickness at the same location as for the
mechanical test samples. The preparation of samples shall be in accordance with EN ISO 14284.
9.3 Location of samples and orientation of tensile test pieces
Samples shall be taken from the relevant flange positions shown in Figure 1. In the case of sections with
tapered flanges, it is permissible, at the manufacturer’s discretion, for the samples to be taken from the
web at a quarter of the total height or from the flange.
Tensile test pieces shall be prepared with their longitudinal axis parallel to the principal direction of
rolling.
9.4 Location of samples and orientation of impact test pieces
Samples shall be taken of the positions shown in Figure 1. For sections of non-uniform thickness,
samples shall be taken from the thickest part of the section at the locations specified.
Test pieces shall be cut parallel or transverse to the principal direction of rolling i.e.: longitudinal or
transverse test pieces (see Tables 5 and 8).
For sections with flange width smaller than 180 mm and channels with flange smaller widths than
90 mm the CVN test in transverse direction is not possible.
9.5 Preparation of test pieces for mechanical tests
9.5.1 General
The requirements of EN ISO 377 shall apply.
9.5.2 Preparation of tensile test pieces
Tensile test pieces shall be prepared in accordance with EN ISO 6892-1 and according to Figure 1.
9.5.3 Preparation of impact test pieces
9.5.3.1 Three V-notch test pieces shall be machined and prepared in accordance with EN ISO 148-1.
The axis of the notch shall be perpendicular to the rolled surface of the product. In addition the
following shall apply:
a) for nominal thicknesses > 12 mm standard 10 mm × 10 mm test pieces shall be so machined that
one side is not further than 2 mm from a rolled surface;
b) for nominal thicknesses ≤ 12 mm, reduced width test pieces shall be used, with a minimum width of
5 mm.
Impact tests for material less than 6 mm thick are not normally carried out but may be agreed with
mechanical values between the purchaser and the manufacturer at the time of the enquiry and order.
9.5.3.2 If the nominal product thickness is not sufficient for the preparation of full size impact test
pieces, test pieces of smaller width [see 9.5.3.1 b)] shall be taken, but not less than 5 mm; the largest
obtainable standard width, either 7,5 mm or 5 mm, shall be used.
The average impact values obtained from three reduced section test pieces shall be as follows:
— for 10 mm × 7,5 mm section, 75 % of specified value;
— for 10 mm × 5 mm section, 50 % of specified value.
10 Test methods
10.1 Chemical analysis
The elements to be determined and reported shall be those given in Tables 3 and 6 as applicable. The
choice of a suitable physical or chemical analytical method for the analysis shall be at the discretion of
the manufacturer.
In case of dispute, the method used shall be agreed taking into account CEN/TR 10261.
10.2 Mechanical tests
10.2.1 Test temperatures
Tensile tests shall be carried out in the temperature range 10 °C to 35 °C. Impact tests shall be carried
out at the temperatures specified in Tables 5 and 8.
10.2.2 Tensile test
The tensile test shall be carried out in accordance with EN ISO 6892-1. The tensile strength R , the
m
yield strength R , and the elongation A, shall be determined.
e
For the specified yield strength, the upper yield strength R shall be determined.
eH
If a yield phenomenon is not present, the 0,2 % proof strength (R ) or the 0,5 % proof strength for
p0,2
total elongation (R ) shall be determined.
t0,5
where S is the
The specified elongation values relate to a proportional gauge length of 5,65 S
o o
original cross-sectional area of the test pieces. If other gauge lengths are used, the percentage value
obtained shall be converted to the value for a gauge length of 5,65 S using the
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