EN 10225:2001
(Main)Weldable structural steels for fixed offshore structures - Technical delivery conditions
Weldable structural steels for fixed offshore structures - Technical delivery conditions
This European Standard specifies requirements for weldable structural steels to be used in the fabrication of fixed offshore structures in the form of plates up to and including 150 mm thick. It also specifies sections up to 63 mm thick except for sections delivered in the as-rolled condition which are permitted up to 25 mm thick only. Seamless hollow sections up to and including 40 mm thick and high frequency electric resistance welded hollow sections up to and including 20 mm thick are specified. Greater thicknesses for sections and hollow sections may be agreed, provided the technical requirements of this European Standard are maintained.
For plates the thickness limitations are:
S355G2+N, S355G5+M, - up to and including 20 mm
S355G3+N, S355G6+M - up to and including 40 mm
S355G7+N, S355G8+N, S355G9+N, S355G10+N - up to and including 150 mm
S355G7+M, S355G8+M, S355G9+M, S355G10+M - up to and including 100 mm
S420G1+Q, S420G1+M, S420G2+Q, S420G2+M - up to and including 100 mm
S460G1+Q, S460G1+M, S460G2+Q, S460G2+M - up to and including 100 mm
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.
In the case of hollow sections formed from plate with the seam fusion welded, this European standard covers only the requirements of the plate material.
Minimum yield strengths up to 460 MPa are specified together with low temperature impact properties at temperatures down to -40 °C.
This European standard applies to material supplied ex-mill or from merchant's stock.
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische Lieferbedingungen
Diese Europäische Norm enthält die Anforderungen an schweißgeeignete Baustähle, die zur Herstellung
von feststehenden Offshore-Konstruktionen verwendet werden, und zwar in Form von Blechen mit einer
Dicke bis einschließlich 150 mm; von Profilen mit einer Dicke bis 63 mm außer bei Profilen im
Walzzustand, die nur bis zu einer Dicke von 25 mm geliefert werden, sowie von nahtlosen Hohlprofilen
mit eine Dicke bis einschließlich 40 mm und von elektrisch widerstandsgeschweißten Hohlprofilen mit
einer Dicke bis einschließlich 20 mm. Grö ß ere Dicken für Profile und Hohlprofile können vereinbart wer-den,
vorausgesetzt, die technischen Lieferbedingungen dieser Norm werden eingehalten.
Für Bleche gelten die folgenden Dickenbeschränkungen:
S355G2+N, S355G5+M: bis einschließlich 20 mm,
S355G3+N, S355G6+M: bis einschließlich 40 mm,
S355G7+N, S355G8+N, S355G9+N, S355G10+N: bis einschließlich 150 mm,
S355G7+M, S355G8+M, S355G9+M, S355G10+M: bis einschließlich 100 mm,
S420G1+Q, S420G1+M, S420G2+Q, S420G2+M: bis einschließlich 100 mm,
S460G1+Q, S460G1+M, S460G2+Q, S460G2+M: bis einschließlich 100 mm.
Diese Norm gilt für Stähle für Offshore-Konstruktionen, die für den Einsatz im Offshore-Bereich vorgese-hen
sind, jedoch nicht für Stähle zur Herstellung von Unterwasser-Pipelines, Steigleitungen (risers), Ver-fahrens-
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, vorausge-setzt,
dass die örtlichen Bedingungen, z. B. die Temperatur, genügend berücksichtigt werden.
Aciers de construction soudables destinés à la fabrication de structures marines fixes - Conditions techniques de livraison
La présente Norme européenne spécifie les prescriptions applicables aux aciers de construction soudables destinés à la fabrication de structures marines fixes sous forme de tôles, d'épaisseur inférieure ou égale à 150 mm. Elle spécifie également les prescriptions applicables aux profils d'épaisseur jusqu'à 63 mm, à l'exception des profilés livrés à l'état brut de laminage (G) qui ne sont autorisés que jusqu'à 25 mm d'épaisseur. Les spécifications applicables aux profils creux sans soudure (S) d'épaisseur inférieure ou égale à 40 mm et aux profils creux soudés par résistance électrique à haute fréquence (HFW) d'épaisseur inférieure ou égale à 20 mm sont également indiquées. Des épaisseurs plus importantes pour les profilés normaux et les profils creux peuvent être acceptées, sous réserve de respecter les prescriptions techniques de la présente norme européenne.
Pour les tôles, les limites d'épaisseur sont les suivantes :
S355 G2+N, S355 G5+M - jusqu'à 20 mm inclus
S355 G3+N, S355 G6+M - jusqu'à 40 mm inclus
S355 G7+N, S355 G8+N, S355 G9+N, S355 G10+N - jusqu'à 150 mm inclus
S355 G7+M, S355 G8+M, S355 G9+M, S355 G10+M - jusqu'à 100 mm inclus
S420 G1+Q, S420 G1+M, S420 G2+Q, S420 G2+M - jusqu'à 100 mm inclus
S460 G1+Q, S460 G1+M, S460 G2+Q, S460 G2+M - jusqu'à 100 mm inclus
La norme 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.
Konstrukcijska jekla za varjene konstrukcije naftnih ploščadi - Tehnični dobavni pogoji
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 10225:2002
01-september-2002
.RQVWUXNFLMVNDMHNOD]DYDUMHQHNRQVWUXNFLMHQDIWQLKSORãþDGL7HKQLþQLGREDYQL
SRJRML
Weldable structural steels for fixed offshore structures - Technical delivery conditions
Schweißgeeignete Baustähle für feststehende Offshore-Konstruktionen - Technische
Lieferbedingungen
Aciers de construction soudables destinés a la fabrication de structures marines fixes -
Conditions techniques de livraison
Ta slovenski standard je istoveten z: EN 10225:2001
ICS:
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
SIST EN 10225:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 10225:2002
---------------------- Page: 2 ----------------------
SIST EN 10225:2002
EUROPEAN STANDARD
EN 10225
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 77.140.10
English version
Weldable structural steels for fixed offshore structures -
Technical delivery conditions
Aciers de construction soudables destinés à la fabrication Schweißgeeignete Baustähle für feststehende Offshore-
de structures marines fixes - Conditions techniques de Konstruktionen - Technische Lieferbedingungen
livraison
This European Standard was approved by CEN on 19 February 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10225:2001 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
Contents
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions.7
4 Information to be supplied by the purchaser.9
5 Dimensions, mass and tolerances .9
6 Classification and designation .11
7 Manufacturing process.11
8 Requirements .13
9 Inspection and testing .20
10 Sampling .22
11 Test methods.25
12 Marking, bundling and protective coating.27
13 Options.29
Annex A (normative) Location of test samples for tensile and impact tests .50
Annex B (normative) Location of tensile test piece when two rolled surfaces cannot be
retained .53
Annex C (normative when option 2 is specified by the purchaser) Details of manufacturing
procedures to be supplied by the manufacturer for steels of groups 2 and 3 .54
Annex D (normative when option 16 is specified by the purchaser) Cold forming
characteristics for steel plate of groups 2 and 3 .55
Annex E (normative when option 18 is specified by the purchaser) Weldability testing for
steels of groups 2 and 3 and mechanical testing of butt welds.56
Annex F (normative when option 18 is specified by the purchaser) Weldability testing for
steels of groups 2 and 3 - Bead-on-plate.76
Annex G (normative) Weldability testing for steels of groups 2 and 3 - Controlled thermal
severity tests (CTS).79
Annex H (informative) National standards which correspond to EURONORMS referenced .88
Bibliography .89
2
---------------------- Page: 4 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
Foreword
This European Standard has been prepared by Technical Committee ECISS/TC 10 "Structural
steels - Grades and qualities", the secretariat of which is held by NEN.
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 February 2002, and conflicting national standards
shall be withdrawn at the latest by February 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
3
---------------------- Page: 5 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
1 Scope
This European Standard specifies requirements for weldable structural steels to be used in the fabrication
of fixed offshore structures in the form of plates up to and including 150 mm thick. It also specifies
sections up to 63 mm thick except for sections delivered in the as-rolled condition which are permitted up
to 25 mm thick only. Seamless hollow sections up to and including 40 mm thick and high frequency
electric resistance welded hollow sections up to and including 20 mm thick are specified. Greater
thicknesses for sections and hollow sections may be agreed, provided the technical requirements of this
European Standard are maintained.
For plates the thickness limitations are:
S355G2+N, S355G5+M, - up to and including 20 mm
S355G3+N, S355G6+M - up to and including 40 mm
S355G7+N, S355G8+N, S355G9+N, S355G10+N - up to and including 150 mm
S355G7+M, S355G8+M, S355G9+M, S355G10+M - up to and including 100 mm
S420G1+Q, S420G1+M, S420G2+Q, S420G2+M - up to and including 100 mm
S460G1+Q, S460G1+M, S460G2+Q, S460G2+M - up to and including 100 mm
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.
In the case of hollow sections formed from plate with the seam fusion welded, this European standard
covers only the requirements of the plate material.
Minimum yield strengths up to 460 MPa are specified together with low temperature impact properties at
temperatures down to –40 °C.
This European standard applies to material supplied ex-mill or from merchant's stock.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revisions. For undated
references the latest edition of the publication referred to applies (including amendments).
4
---------------------- Page: 6 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
EN 288-3, Specification and approval of welding procedures for metallic materials — Part 3: Welding
procedure tests for the arc welding of steels
EN 473, Non destructive testing - Qualification and certification of NDT personnel - General principles
EN 571-1, Non-destructive testing — Penetrant testing — Part 1: General principles
EN 895, Destructive tests of welds in metallic materials — Transverse tensile tests
EN 1011-1, Welding — Recommendations for welding of metallic materials — Part 1: General guidance
for arc welding
EN 10002-1, Metallic materials - Tensile testing — Part 1: Method of test (at ambient temperature)
EN 10020, Definition and classification of grades of steels
EN 10021, General technical delivery requirements for steel and iron products
EN 10024, Hot rolled taper flange I sections — Tolerances on shape and dimensions
EN 10027-1, Designation systems for steels — Part 1: Steel names, principal symbols
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,shape and mass
EN 10034, Structural steel I and H sections — Tolerances on shape and dimensions
EN 10045-1, Metallic materials — Charpy impact test — Part 1: Test method
EN 10052, Vocabulary of heat treatment terms for ferrous products
EN 10055, Hot-rolled steel equal flange tees with radiused root and toes - Dimensions and tolerances on
shape and dimensions
EN 10056-2, Structural steel equal and unequal leg angles — Part 2: Tolerances on shape and
dimensions
EN 10067, Hot-rolled bulb flats — Dimensions and tolerances on shape, dimensions and mass
EN 10079, Definition of steel products
EN 10113-1, Hot-rolled products in weldable fine grain structural steels — Part 1: General delivery
conditions
EN 10113-2, Hot-rolled products in weldable fine grain structural steels — Part 2: Delivery conditions for
normalized/normalized rolled steels
EN 10113-3, Hot-rolled products in weldable fine grain structural steels — Part 3: Delivery conditions for
thermomechanical rolled steels
EN 10160, Ultrasonic testing of steel flat product of thickness equal to or greater than 6 mm (reflection
method)
EN 10163-2, Delivery requirements for surface conditions of hot-rolled steel plates, sheets, wide flats and
sections — Part 2: Plates and wide flats
5
---------------------- Page: 7 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
EN 10163-3, Delivery requirements for surface conditions of hot-rolled steel plates, sheets, 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 10204, Metallic products — Types of inspection documents
EN 10210-1, Hot finished structural hollow sections of non-alloy and fine grain structural steels —
Part 1: Technical delivery requirements
EN 10210-2, Hot finished structural hollow sections of non-alloy and fine grain structural steels —
Part 2: Tolerances, dimensions and sectional properties
EN 10233, Metallic materials — Tube — Flattening test
EN 10246-3, Non-destructive testing of steel tubes — Part 3: Automatic eddy current testing of seamless
and welded (except submerged arc welded) steel tubes for the detection of imperfections
EN 10246-5, Non-destructive testing of steel tubes — Part 5: Automatic full peripheral magnetic
transducer/flux leakage testing of seamless and welded (except submerged arc welded) ferromagnetic
steel tubes for the detection of longitudinal imperfections
EN 10246-7, Non-destructive testing of steel tubes — Part 7: Automatic full peripheral ultrasonic testing of
seamless and welded (except submerged arc welded) steel tubes for the detection of longitudinal
imperfections
EN 10246-8, Non-destructive testing of steel tubes — Part 8: Automatic ultrasonic testing of the weld
seam of electric welded steel tubes for the detection of longitudinal imperfections
EN 10246-12, Non-destructive testing of steel tubes — Part 12: Magnetic particle inspection of seamless
and welded ferromagnetic steel tubes for the detection of surface imperfections
EN 10246-14, Non-destructive testing of steel tubes — Part 14: Automatic ultrasonic testing of seamless
and welded (except submerged arc welded) steel tubes for the detection of laminar imperfections
EN 10246-15, Non-destructive testing of steel tubes — Part 15: Automatic ultrasonic testing of strip/plate
in the manufacture of welded steel tubes for the detection of laminar imperfections
EN 10256, Non-destructive testing of steel tubes — Qualifications and competence of levels 1 and 2 non-
destructive testing personnel
EN 10279, Hot rolled steel channels — Tolerances on shape, dimensions and mass
prEN 10306:1999, Iron and steel - Ultrasonic testing of broad flanged beams with parallel flanges and
IPE beams
EN ISO 4063, Welding, brazing, soldering and braze welding of metals — Nomenclature of processes
and reference numbers for symbolic representation on drawings (ISO 4063:1990)
EN ISO 2566-1, Steel - Conversion of elongation values — Part 1: Carbon and low alloy steels
(ISO 2566-1:1984)
EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1:1997)
EN ISO 6947, Welds — Working positions — Definitions of angles of slope and rotation (ISO 6947:1993)
6
---------------------- Page: 8 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
prEN ISO 9934-1, Non destructive testing - Magnetic particle testing — Part 1: General principles
(ISO/DIS 9934-1:1996)
ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical
composition
3 Terms and definitions
For the purposes of this standard, the following terms and definitions and those given in EN 10020,
EN 10021, EN 10052, EN 10079 and ISO 14284 apply:
3.1
parent product
the product rolled from one piece of steel
3.2
manufacturer
the manufacturer of the steel products
3.3
supplier
the manufacturer of material supplied ex-mill or the merchant for material supplied from a merchant’s
stock (see clause 1)
3.4
purchaser
the purchaser or his representative
3.5
concast
material produced by a continuous casting process route
3.6
primary elements
elements that are essential to the overall integrity of the installation including critical load transfer
points and stress concentrations such as nodes. This definition also includes bracing and piling
7
---------------------- Page: 9 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
3.7
secondary elements
elements of minor importance, failure of which would be unlikely to affect the overall integrity of the
installation
3.8
seamless hollow section (S)
hollow long product, open at both ends, of circular, square or rectangular section. Made by piercing a
solid product to obtain a tube hollow which is further processed, hot or cold, into its final dimensions
3.9
high frequency welded hollow section (HFW)
hollow long product, open at both ends, of circular, square or rectangular section. Made by pressure
welding in a continuous or non-continuous process, in which strip is formed cold into a hollow profile
and the seam weld made by heating the adjacent edges through the resistance to the passage of a
high frequency current and pressing the edges together. The electric current may be applied by direct
electrode contact or by induction. After welding, the tube hollow is further processed, hot or cold, into
its final dimensions
3.10
normalizing rolling
rolling process in which the final deformation is carried out in a particular 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
For the purposes of this European standard, the designation of this delivery condition and of the
normalized condition is +N.
NOTE In international publications for both normalizing rolling and 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.
3.11
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
For the purposes of this European standard, the designation of this delivery condition is +M.
NOTE Thermomechanical rolling leading to the delivery condition +M can include processes with an
increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and
quenching and tempering.
3.12
quenching and tempering
3.12.1
quenching
operation which consists of cooling a ferrous product more rapidly than in still air. Quenching also
includes direct quenching
8
---------------------- Page: 10 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
3.12.2
tempering
heat treatment applied to a ferrous product generally after quench hardening or other heat treatment
to bring the properties to the required level. It consists of heating to specific temperatures (Ac ) and
1
soaking one or more times followed by cooling at an appropriate rate
For the purposes of this European standard, the designation of delivery condition quenched and
tempered is +Q.
4 Information to be supplied by the purchaser
4.1 General
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) details of the product form;
b) number of this European standard i.e. EN 10225;
c) the steel grade (steel name or steel number);
d) the type of inspection documents required (see 9.1);
e) where applicable, the number of additional copies of inspection documents required and the
forwarding address (see 9.1.1);
f) nominal dimensions and when necessary tolerances;
g) where applicable, that the material is required for the manufacture of piling;
h) purchaser’s order number and item number if applicable;
i) quantity.
4.2 Options
A number of options are specified in clause 13. In the event that the purchaser does not indicate a wish to
implement any of these options, the supplier shall supply in accordance with the basic specification.
5 Dimensions, mass and tolerances
5.1 Dimensions and tolerances
5.1.1 The dimensions and tolerances of the product shall be in accordance with one of the
following relevant European Standards and Euronorms and as further specified in 5.1.2 and 5.1.3:-
EN 10024, EN 10029, EN 10034, EN 10055, EN 10056-2, EN 10067, EN 10210-2, EN 10279.
5.1.2 Unless otherwise agreed plate thickness tolerances shall be in accordance with EN 10029
Class A.
See option 1.
9
---------------------- Page: 11 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
5.1.3 On plates, with ripples or corrugations less than 2 m apart (peak to peak) the following
criteria shall apply.
a) The flatness tolerance shall, in all cases, be measured to the upper surface of the plate laid on a
level surface;
b) The maximum depth of any ripple or corrugation under the 2 m straight edge shall be 5 mm. The
average depth of all ripples on any one plate shall not exceed 4 mm;
c) The minimum depth to constitute a ripple or corrugation shall be 2 mm;
d) The maximum number of ripples or corrugations allowed in any one plate shall be as given in
Tables 1 and 2, and shall apply to all plates 10 mm thick and over and for all plate widths.
Table 1 — Maximum number of ripples or corrugations in plate
with thickness 12 mm
Length (L) Maximum number of ripples or
corrugations
m
L 6 2
3
L 9
4
L 12
5
L 15
Table 2 — Maximum number of ripples or corrugations inplate
with thickness 10 mm < 12 mm
Length (L) Maximum number of ripples or
corrugations
m
4
L 6
5
L 9
6
L 12
8
L 15
5.2 Mass of steel
3
The calculated mass shall be determined using a density of 7,85 kg/dm .
10
---------------------- Page: 12 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
6 Classification and designation
6.1 Classification
The steel grade S355 specified in this European Standard is classified as an alloy quality steel and the
steel grades S420 and S460 specified in this European Standard are classified as alloy special steels
according to EN 10020.
This standard includes the following grades:
a) Group 1 grades with few changes from EN 10113 Parts 1-3 and EN 10210-1: (minor changes to
chemical analysis, CEV and impact requirements only);
b) Groups 2 and 3 grades substantially modified from EN 10113 Parts 1-3 and EN 10210-1 including
qualities with enhanced through-thickness ductility.
6.2 Designation
For the steel grades covered by this European Standard the steel names are based on EN 10027-1 and
CR 10260. The steel numbers are allocated in accordance with EN 10027-2.
The designation consists of:
a) the number of this European Standard i.e. EN 10225;
b) the symbol S;
c) the indication of the minimum specified yield strength for thicknesses 16 mm expressed in MPa;
d) the letter G, followed by the relevant digit(s) characterizing the steel grade
e) where applicable, the letter indicating the delivery condition i.e. +N, +M or +Q (see ).
7.3
7 Manufacturing process
7.1 Steel manufacturing process
The steels shall be made by the basic oxygen or basic electric arc furnace process. All steels shall be
fully killed and made to fine grain practice.
Steels of group 3 shall be vacuum degassed or ladle refined.
See option 2.
7.2 Thickness limits and segregation control
7.2.1 For concast steels of groups 2 and 3, provided that the resultant products comply with all the
relevant requirements of this European Standard, the maximum thickness of product from the
continuous casting process shall be at the manufacturer's discretion.
See option 3.
11
---------------------- Page: 13 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
7.2.2 The minimum rolling reduction ratio of concast material for plate shall be 4:1 except for piling
where it shall be 3:1.
See option 4.
7.2.3 Intermediate or finished products, produced by the continuous casting route shall be
examined for centre line segregation in accordance with the manufacturer’s procedures and as
agreed by the purchaser. This does not apply to seamless hollow sections.
See option 2.
7.3 Delivery condition
7.3.1 Plates of group 1
Plates shall be supplied in the furnace normalized/normalized rolled (+N) or thermomechanically rolled
(+M) condition. The customer shall specify the appropriate grade at the time of enquiry and order.
Delivery conditions (+N) and (+M) are limited to a maximum thickness of 40 mm.
See option 5.
Examples:
a) Plate to grade S355G2+N
Plate with few changes from EN 10113-2 and with minimum specified R = 355 MPa and impact
e
values measured at –20 °C, supplied in the normalized or normalized rolled condition.
b) Plate to grade S355G6+M
Plate with few changes from EN 10113-3 and with minimum specified R = 355 MPa and impact
e
values measured at –40 °C, supplied in the thermomechanically rolled condition.
7.3.2 Plates of groups 2 and 3
Plates shall be supplied in the furnace normalized (+N), thermomechanically rolled (+M) or quenched and
tempered (+Q) condition. The customer shall specify the appropriate grade at the time of enquiry and
order.
Delivery condition (+N) is limited to a maximum thickness of 150 mm and delivery conditions (+M) and
(+Q) to 100 mm.
See option 5.
Examples:
a) Plate to grade S355G7+N (or S355G7+M)
Plate substantially modified from EN 10113-2 (or EN 10113-3) and with minimum specified
R = 355 MPa and impact values measured at –40 °C, supplied in the normalized or normalized
e
rolled (or thermomechanically rolled) condition.
NOTE The normalized rolled condition is only permitted when Option 5 has been called up.
b) Plate to grade S460G2+Q (or S460G2+M)
Plate substantially modified from EN 10137-2 (or EN 10113-3), with controlled chemistry,
12
---------------------- Page: 14 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
particularly carbon, minimum specified R = 460 MPa and impact values measured at –40 °C with
e
specified through-thickness properties, supplied in the quenched and tempered (or
thermomechanically rolled) condition.
7.3.3 Sections
Sections shall be supplied in the as-rolled, normalized/normalized rolled (+N) or thermomechanically
rolled (+M) condition as shown in Tables 6 and 7, at the manufacturer’s discretion.
The as-rolled delivery condition is limited to a maximum thickness of 25 mm.
7.3.4 Hollow sections
Hollow sections shall be supplied in the normalized/normalized rolled (+N) or quenched and tempered
(+Q) condition as shown in Tables 8 to 11 at the manufacturer’s discretion.
NOTE S420 and S460 grades are normally only available in circular form.
8 Requirements
8.1 General
In addition to the requirements of this European Standard, the general technical delivery requirements
specified in EN 10021 also apply.
8.2 Chemical composition
8.2.1 Ladle analysis
a) The chemical composition for all qualities determined by ladle analysis shall comply with the
values in Tables 4, 6, 8 and 10.
b) For residual element control in steels of groups 2 and 3, boron (B) shall not be intentionally
added to the steel. The deliberate addition of any elements other than those listed in Tables 4, 6,
8 and 10 shall not be permitted.
c) When a restricted ladle analysis is agreed for steels of groups 2 and 3, the steel shall comply with
the agreed analysis range.
See option 7.
8.2.2 Product analysis
8.2.2.1 Steels of group 1
Product analysis shall not be carried out except when option 8 is specified.
13
---------------------- Page: 15 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
8.2.2.2 Steels of groups 2 and 3
a) The chemical composition determined by product analysis shall comply with the values given in
Tables 4, 6, 8 and 10.
See option 6.
b) When restricted product analysis is agreed the steel shall comply with the agreed analysis range.
See option 7.
8.2.3 Carbon equivalent value (CEV) and P
cm
8.2.3.1 General
1
CEV and P shall be calculated using the following equations where each element is expressed as a
cm
mass percentage:-
Mn Cr + Mo + V Ni + Cu
CEV = C + + +
6 5 15
Si Mn + Cu + Cr Ni Mo V
= C + + + + + + 5B
P
cm
30 20 60 15 10
8.2.3.2 Plates
The maximum permissible CEV and P values for plates are given in Table 3. These apply to product
cm
analysis except for grades S355G2+N, G3+N, G5+M and G6+M which shall be based on ladle analysis.
The CEV value shall apply for all designations except S355G9+N, G9+M, G10+N and G10+M where the
P value shall apply.
cm
See option 9.
1
IIW, International Institute of Welding formula
14
---------------------- Page: 16 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
Table 3 — CEV and P values for plates
cm
a
Steel name CEV P
cm
max. max.
S355G2+N
S355G3+N
0,43 Not specified
S355G5+M
S355G6+M
S355G7+N
S355G7+M
0,43 0,24
S355G8+N
S355G8+M
S355G9+N
0,43 0,22
S355G10+N
S355G9+M
b c b c
0,41 /0,42 0,21 /0,22
S355G10+M
S420G1+Q
S420G1+M
d
0,42 0,22
S420G2+Q
S420G2+M
S460G1+Q
S460G1+M
d
0,43 0,22
S460G2+Q
S460G2+M
a
For steel numbers, see Tables 4 to 11.
b
For t 75 mm.
c
For 75 mm < t 100 mm.
d
A P value of 0,23 for t 15 mm is permitted.
cm
15
---------------------- Page: 17 ----------------------
SIST EN 10225:2002
EN 10225:2001 (E)
8.2.3.3 Sections
The CEV of all sections shall not exceed 0,43.
See option 9, where a P value not exceeding 0,24 shall apply in lieu of CEV.
cm
These values apply to the product analysis except for grades S355G1, G1+N, G4 and G4+M where ladle
analysis shall apply.
8.2.3.4 Hollow sections
The CEV of all hollow sections shall not exceed 0,43.
See option 9, where a P value not exceeding 0,25 shall apply in lieu of a CEV.
cm
These values apply to the product analysis except for the grade S355G1+N where ladle analysis shall
apply.
8.3 Mechanical properties
8.3.1 General
Under the inspection and testing conditions as specified in clause 9 and in the heat treatment conditions
given in 8.3.2 for plates and hollow sections, the tensile properties and the impact properties at the
verification test temperature shall c
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.