Weldable structural steels for fixed offshore structures - Technical delivery conditions - Part 1: Plates

This part of EN 10225 specifies requirements for weldable structural steels to be used in the fabrication of fixed offshore structures in the form of plates.
Following thickness limitations are given in this standard:
-   S355NL1O up to and including 200 mm;
-   S355ML1O, S420ML1O, S460ML1O, S500ML1O up to and including 120 mm;
-   S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to and including 150 mm.
Greater thicknesses may be agreed, provided the technical requirements of this European Standard are maintained.
The 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. temperature.
NOTE   There is an Annex F on the prequalification of steels for fixed offshore structures in arctic areas.
Minimum yield strengths up to 690 MPa are specified together with low temperature impact properties at temperatures down to -40 °C.

Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische Lieferbedingungen - Teil 1: Bleche

Dieser Teil der EN 10225 legt die Anforderungen an Bleche aus schweißgeeignete Baustählen fest, die zur Herstellung von feststehenden Offshore-Konstruktionen verwendet werden.
In dieser Norm werden folgende Dickenbeschränkungen angegeben:
-   S355NL1O bis zu 200 mm,
-   S355ML1O, S420ML1O, S460ML1O, S500ML1O bis zu 120 mm,
-   S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO bis zu 150 mm.
Größere Dicken können vereinbart werden, vorausgesetzt die technischen  Lieferbedingungen dieser Europäischen Norm werden eingehalten.
Diese 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 Temperatur, genügend berücksichtigt werden.
ANMERKUNG    Im Anhang F ist eine Vorqualifizierung von Stählen für den arktischen Einsatz bei Offshore Konstruktionen angegeben.
Mindestwerte der Streckgrenze bis zu 690 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 1 : Tôles

Le présent document spécifie les exigences applicables aux aciers de construction soudables destinés à
la fabrication de structures marines fixes sous forme de tôles.
Les limites d'épaisseur suivantes sont données dans la présente norme :
- S355NLO jusqu'à 200 mm inclus ;
- S355MLO, S420MLO, S460MLO, S500MLO jusqu'à 120 mm inclus ;
- S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO jusqu'à 150 mm inclus.
Des épaisseurs plus importantes peuvent être convenues par accord, à condition que les exigences
techniques de la présente Norme européenne soient respectées.
La présente norme s'applique aux aciers pour constructions marines exploitées sur le domaine maritime
européen, y compris les tôles pour les profils creux soudés formés à froid (voir l'EN 10225‐4). Elle ne
s'applique pas aux 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 comporte une Annexe F informative sur la présélection des aciers destinés à la
construction de structures marines fixes dans les zones arctiques.
Les limites d'élasticité jusqu'à 690 MPa sont spécifiées ainsi que les énergies de rupture en flexion par
choc à des températures jusqu'à - 40 °C.

Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni pogoji - 1. del: Plošče

Ta del standarda EN 10225 določa zahteve za variva konstrukcijska jekla v obliki plošč, ki se uporabljajo za izdelavo konstrukcij naftnih ploščadi.
V tem standardu so podane naslednje omejitve debeline:
– S355NL1O do vključno 200 mm;
– S355ML1O, S420ML1O, S460ML1O, S500ML1O do vključno 120 mm;
– S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO do vključno 150 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 F o predizbiri jekel za konstrukcije naftnih ploščadi v arktičnih območjih.
Minimalne napetosti tečenja do 690 MPa so določene skupaj z nizkotemperaturnimi lastnostmi pri temperaturah do –40 °C.

General Information

Status
Published
Public Enquiry End Date
30-Nov-2017
Publication Date
29-May-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-May-2019
Due Date
29-Jul-2019
Completion Date
30-May-2019

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SLOVENSKI STANDARD
SIST EN 10225-1:2019
01-julij-2019
Nadomešča:
SIST EN 10225:2009
Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni
pogoji - 1. del: Plošče

Weldable structural steels for fixed offshore structures - Technical delivery conditions -

Part 1: Plates
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische
Lieferbedingungen - Teil 1: Bleche

Aciers de construction soudables destinés à la fabrication de structures marines fixes -

Conditions techniques de livraison - Partie 1 : Tôles
Ta slovenski standard je istoveten z: EN 10225-1:2019
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
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
SIST EN 10225-1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10225-1:2019
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SIST EN 10225-1:2019
EN 10225-1
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 1: Plates

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 1 : Tôles 1: Bleche
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 10225-1:2019 E

worldwide for CEN national Members.
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SIST EN 10225-1:2019
EN 10225-1:2019 (E)
Contents Page

European foreword ...................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 7

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 ..................................................................................................................................... 10

6 Manufacturing process ............................................................................................................................... 10

6.1 Steel manufacturing process .................................................................................................................... 10

6.2 Qualification of personnel for NDT-activities ..................................................................................... 10

6.3 Delivery condition ........................................................................................................................................ 10

6.4 Thickness limits ............................................................................................................................................ 11

7 Requirements ................................................................................................................................................. 11

7.1 General .............................................................................................................................................................. 11

7.2 Chemical composition ................................................................................................................................. 11

7.2.1 Heat analysis ................................................................................................................................................... 11

7.2.2 Product analysis ............................................................................................................................................ 11

7.2.3 Carbon equivalent values (CEV) and P ............................................................................................ 12

7.3 Mechanical properties ................................................................................................................................ 12

7.3.1 General .............................................................................................................................................................. 12

7.3.2 Post weld heat treatment (PWHT) ......................................................................................................... 12

7.3.3 Strain age tests ............................................................................................................................................... 12

7.3.4 Through-thickness testing ......................................................................................................................... 12

7.3.5 Fracture mechanic testing ......................................................................................................................... 12

7.3.6 Prequalification for arctic areas .............................................................................................................. 13

7.4 Technological properties ........................................................................................................................... 13

7.4.1 Cold forming characteristics of steel plate .......................................................................................... 13

7.4.2 Hot forming procedures for steel plate ................................................................................................. 13

7.4.3 Weldability data ............................................................................................................................................ 13

7.5 Internal soundness and non-destructive testing .............................................................................. 13

7.6 Surface quality ............................................................................................................................................... 13

7.7 Dimensions, tolerances, mass .................................................................................................................. 14

7.7.1 Dimensions and tolerances on dimensions and shape ................................................................... 14

7.7.2 Mass of steel .................................................................................................................................................... 14

8 Inspection ........................................................................................................................................................ 14

8.1 General .............................................................................................................................................................. 14

8.2 Types of inspection documents ............................................................................................................... 14

8.3 Summary of inspections ............................................................................................................................. 15

8.4 Intermediary supply .................................................................................................................................... 15

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SIST EN 10225-1:2019
EN 10225-1:2019 (E)

9 Frequency of testing and preparation of samples and test pieces.............................................. 15

9.1 Frequency of test ........................................................................................................................................... 15

9.1.1 Chemical analysis ......................................................................................................................................... 15

9.1.2 Tensile test ...................................................................................................................................................... 15

9.1.3 Impact test ....................................................................................................................................................... 16

9.2 Selection and preparation of samples for product analysis.......................................................... 16

9.3 Location of samples and orientation of tensile test pieces ............................................................ 16

9.4 Location of samples and orientation of impact test pieces ........................................................... 16

9.5 Preparation of test pieces for mechanical tests................................................................................. 16

9.5.1 General ............................................................................................................................................................. 16

9.5.2 Preparation of tensile test pieces ........................................................................................................... 16

9.5.3 Preparation of impact test pieces ........................................................................................................... 16

10 Test methods .................................................................................................................................................. 17

10.1 Chemical analysis ......................................................................................................................................... 17

10.2 Mechanical tests ............................................................................................................................................ 17

10.2.1 Test temperatures ........................................................................................................................................ 17

10.2.2 Tensile test ...................................................................................................................................................... 17

10.2.3 Impact test ....................................................................................................................................................... 18

10.3 Visual inspection and dimensional check ............................................................................................ 18

10.4 Non-destructive tests .................................................................................................................................. 18

10.4.1 General ............................................................................................................................................................. 18

10.4.2 NDT for plates ................................................................................................................................................ 18

10.5 Retests, sorting and reprocessing .......................................................................................................... 19

11 Marking – Die stamping and paint marking ........................................................................................ 19

12 Options ............................................................................................................................................................. 19

Annex A (normative when Option 1 is specified by the purchaser) Further details of steel

manufacturing procedures to be supplied by the manufacturer ................................................ 34

Annex B (normative when Option 17 is specified by the purchaser) Weldability testing and

mechanical testing of butt welds............................................................................................................. 35

Annex C (normative when Option 17 is specified by the purchaser) Weldability testing -

Bead-on-plate ................................................................................................................................................. 48

Annex D (normative when Option 17 is specified by the purchaser) Weldability testing -

Controlled thermal severity tests (CTS) ............................................................................................... 51

Annex E (normative when Option 15 is specified by the purchaser) Cold forming

characteristics for steel plates ................................................................................................................. 58

Annex F (informative) Prequalification of steels for offshore structures operating in arctic

areas .................................................................................................................................................................. 59

Annex G (informative) List of options of EN 10225-1 to -4 ......................................................................... 60

Bibliography ................................................................................................................................................................. 62

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SIST EN 10225-1:2019
EN 10225-1:2019 (E)
European foreword

This document (EN 10225-1:2019) 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 10225-2:2019, 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 the following technical changes were made:
— split of the standard in four parts;
— the steel names were adapted to EN 10027-1;

— former grades of group 3 are no longer listed, new options with the same enhanced properties have

been introduced (Options 2 and 3);

— an informative Annex F 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)

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SIST EN 10225-1:2019
EN 10225-1:2019 (E)
1 Scope

This document specifies requirements for weldable structural steels, in the form of plates, to be used in

the fabrication of fixed offshore structures.
The following thickness limitations are given in this standard:
— S355NLO up to and including 200 mm;
— S355MLO, S420MLO, S460MLO, S500MLO up to and including 120 mm;

— S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to and including 150 mm.

Greater thicknesses can 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, including plate for structural hollow sections (see EN 10225-4). It does not apply to

plates 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 F on the prequalification of steels for fixed offshore

structures in arctic areas.

Minimum yield strengths up to 690 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 10029, Hot-rolled steel plates 3 mm thick or above — Tolerances on dimensions and shape

EN 10051, Continuously hot-rolled strip and plate/sheet cut from wide strip of non-alloy and alloy steels

— Tolerances on dimensions and shape
EN 10079, Definition of steel products

EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection

method)
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SIST EN 10225-1:2019
EN 10225-1:2019 (E)

EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections

— Part 1: General requirements

EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections

— Part 2: Plate and wide flats

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 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-

EN ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles (ISO 3452-1)

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 6947, Welding and allied processes — Welding positions (ISO 6947)

EN ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel (ISO 9712)

EN ISO 9934-1, Non-destructive testing — Magnetic particle testing — Part 1: General principles (ISO

9934-1)

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

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SIST EN 10225-1:2019
EN 10225-1:2019 (E)

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
normalizing

heat treatment with the object of refining and eventually making uniform the grain size of a ferrous

product and comprising heating it at a temperature slightly above A [A for hypereutectoid steels],

3 1

without prolonged soaking at this temperature, followed by cooling at a suitable rate

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SIST EN 10225-1:2019
EN 10225-1:2019 (E)
3.7
parent product
product rolled from one ingot or slab
3.8
purchaser
purchaser or their representative
3.9
quenching

operation which consists of cooling a ferrous product more rapidly than in still air

Note 1 to entry: Quenching includes direct quenching.
3.10
tempering

heat treatment applied to a ferrous product generally after quenching or other heat treatment to bring

the properties to the required level

Note 1 to entry: Tempering consists of heating to specific temperatures ( followed by cooling at an appropriate rate.
3.11
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 10225-1);
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SIST EN 10225-1:2019
EN 10225-1:2019 (E)
— 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/normalized rolled structural steels: capital letters NL - letter N to indicate

normalized or 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); or

— quenched and tempered structural steels: capital letters QL - capital letter Q to indicate the

quenched and tempered condition, letter L to indicate specified impact properties at –40 °C

(see 6.3); 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, normalized/normalized rolled condition with a minimum impact energy value of 50 J at

−40 °C, for offshore application:
EN 10225–1 — S355NLO
EN 10225–1 — 1.8808

NOTE For a transition period the old steel names and numbers are given in Tables 3 to 11 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 plates or mass);
b) details of the product form: plate;

c) the name of the standard for dimensions and tolerances and the dimensions and tolerances:

EN 10029 (or EN 10051);

d) the name of this standard (EN 10225-1) 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
...

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