EN 10225:2001

SLOVENSKI STANDARD
01-september-2002
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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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

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
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.
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).
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
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)
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
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
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
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.
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


L  9

L 12

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
L 6

L 9

L  12

L  15
5.2 Mass of steel
The calculated mass shall be determined using a density of 7,85 kg/dm .
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.
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,
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.
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
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.
IIW, International Institute of Welding formula
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
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 comply with the relevant requirements given in Tables 5a, 5b, 5c and
5d for plates, Table 7 for sections and Tables 9 and 11 for hollow sections.
8.3.2 Heat treatment condition of test pieces
For plates and hollow sections, samples (from which the test pieces are prepared and tested) shall be
tested in the following conditions:-
a) For nominal thicknesses up to and including 20 mm - as delivered condition only;
b) For nominal thicknesses over 20 mm up to and including 40 mm - as delivered condition. In
addition, when required by the purchaser, the manufacturer shall provide supporting data
illustrating the effect of simulated post weld heat treatment (PWHT) on the tensile and impact
properties of the type of products involved;
c) For nominal thicknesses over 40 mm - as delivered condition. In addition, when required by the
purchaser, the manufacturer shall provide supporting data illustrating the effect of simulated
PWHT on the tensile and impact properties of the type of products involved. Alternatively, the
purchaser may require the manufacturer to test the material in the simulated PWHT condition
(see option 10).
d) For supply conditions +N and +M, the simulated PWHT shall be at 580 ± 20
C (see option 11) for a
minimum time of 1 h per 25 mm thickness of product, or 4 h, whichever is the greater.
For the quenched and tempered supply condition, the simulated PWHT shall be within the range 550 to
620 °C with a maximum temperature of 25
C below the tempering temperature on the test certificate, for
a minimum time of 1 hr per 25 mm thickness or 4 h, whichever is the greater.
8.3.3 Reduced section impact test pieces
If the nominal product thickness is not sufficient for the preparation of full size impact test pieces, test
pieces of smaller width (see 10.2.5 b)) shall be taken, with a minimum width of 5 mm using the full
thickness where necessary.
The average impact values obtained from three reduced section test pieces shall be as follows:
for 10 mm x 7,5 mm section, 75 % of specified value
for 10 mm x 5 mm section, 50 % of specified value.
8.3.4 Strain age tests
Strain age tests shall not be carried out except when option 12 is specified.
See option 12.
8.3.5 Through-thickness testing
Through-thickness testing shall not be carried out, except for steels of group 3 in thickness  25 mm
when option 13 is specified.
See option 13.
8.3.6 Flattening test
A flattening test shall not be carried out except when option 14 is specified for circular welded hollow
sections.
See option 14.
8.3.7 Wide plate and CTOD data for parent plate steels of groups 2 and 3
Data is not required except when option 15 is specified.
See option 15.
8.4 Technological properties
8.4.1 Cold forming characteristics of steel plate of groups 2 and 3
When required by the purchaser, the supplier shall make available data which characterize the cold
forming behaviour of these steels. If such data is not available or are deemed inadequate by the
purchaser, additional testing may be specified (see annex D).
See option 16.
8.4.2 Hot forming procedures for steel plate of groups 2 and 3
When required by the purchaser the steel supplier shall provide general information on the procedures
and effects of hot forming on material properties.
See option 17.
NOTE Materials in delivery condition +M or +Q are generally unsuitable for subsequent normalizing or hot
forming above 580 °C. Heating above 580 °C may lower the strength values. If temperatures above 580 °C are
required, reference should be made to the supplier.
8.4.3 Weldability data for steels of groups 2 and 3
At the time of the enquiry and order for all products exceeding 40 mm in thickness the manufacturer shall
have available data on the weldability of the material. Weldability data for other thicknesses may be
agreed between supplier and customer. Any previously obtained data which the manufacturer proposes
to submit shall have been verified by a competent third party, acceptable to the purchaser and who
witnessed the tests. All previously obtained data presented shall bear the stamp or seal of the third party.
See option 18.
NOTE This data refers only to the weldability of the material being supplied and is intended for use in
development and preparation of fabrication procedures.
8.5 Surface condition and internal defects
8.5.1 Plates
8.5.1.1 Surface condition
All surfaces shall be 100 % visually inspected. The surface condition shall comply with EN 10163-2,
Class A, sub-class 3 except as otherwise specified in this clause. Plates shall be presented for inspection
such that the steel surface can be readily examined.
Repair of defects such as cracks, shells or seams (in accordance with EN 10163-2) shall be followed by
magnetic particle inspection or dye penetrant inspection.
8.5.1.2 Internal soundness for steels of group 1
The material shall be sound and free from such internal defects as might preclude its use for the purpose
for which it is intended.
See option 19.
8.5.1.3 Internal soundness for steels of groups 2 and 3
All plates shall be ultrasonically tested in accordance with EN 10160.
Ultrasonic testing shall be carried out either prior to, or after the final heat treatment and shall meet the
requirements of EN 10160, class S /E for steels of group 3 and EN 10160, class S /E for steels of
1 2 0 1
group 2.
8.5.2 Sections
8.5.2.1 Surface condition
All surfaces shall be 100 % visually inspected for defects and the surface condition shall comply with
EN 10163-3, Class C, sub-class 2.
See option 20.
8.5.2.2 Internal soundness for steels of group 1
The material shall be sound and free from such internal defects as might preclude its use for the purpose
for which it is intended.
See option 21.
8.5.2.3 Internal soundness for steels of groups 2 and 3
The material shall be sound and free from such internal defects as might preclude its use for the purpose
for which it is intended.
Internal soundness for rolled sections with web thickness greater than 12 mm shall be subject to
ultrasonic examination of webs and flanges when specified by the purchaser and shall meet the
requirements of prEN 10306:1999, Class 21.
See option 21.
NOTE Testing of the region between the web and the flange should be subject to agreement between the
supplier and the purchaser.
8.5.3 Hollow sections
8.5.3.1 Surface condition
Hollow sections shall be free from external and internal defects that can be detected by visual inspection
in accordance with this European Standard as follows:
The outside surface condition and, where practical, the inside surface condition shall be such that surface
imperfections requiring dressing and/or surface defects can be identified.
It shall be permissible to rectify surface imperfections by grinding or machining, provided that after so
doing, the hollow section thickness in the dressed region is not less than the minimum permissible wall
thickness. All dressed areas shall blend smoothly into the contour of the section.
Surface imperfections which encroach on the minimum permissible wall thickness shall be considered as
defects and the product shall be deemed not to comply with this European Standard.
Hollow sections shall contain no dents greater than 3 mm or 1 % of the specified outside diameter or
largest outside dimensions respectively, whichever is the lesser. This shall be measured as the gap
between the lowest point of the dent and a prolongation of the original contour of the hollow section. The
length of the dent in any direction shall not exceed 25 % of the section's largest outside dimension.
Any sharp bottom gouge within a dent or otherwise shall be removed by grinding. The use of shot
peening or welding is not permitted.
When the wall thickness has been reduced by more than 7,5 % of the nominal wall thickness during
rectification, magnetic particle inspection shall be used to confirm removal of imperfections (see 11.3.4).
8.5.3.2 Internal soundness (laminations)
Hollow sections shall comply with the requirements of EN 10246-14 acceptance level U3 or EN 10246-15
acceptance level U3.
When required, compliance with this requirement shall be demonstrated.
See option 22.
8.5.3.3 Non-destructive testing of the weld seam of welded hollow sections
The weld seam of welded hollow sections shall be tested full length for longitudinal defects in accordance
with EN 10246-3, EN 10246-5 or EN 10246-8 to acceptance levels E4, F4 or U4 respectively.
NOTE For rectangular or square hollow sections this is normally carried out in the circular form before
squaring.
The method of test shall be at the discretion of the manufacturer.
When EN 10246-5 or EN 10246-8 are used, calibration shall be carried out using an external reference
notch.
When the purchaser has indicated that welded hollow sections are to be used in primary elements, the
internal weld bead shall be removed and the weld seam tested full length for longitudinal defects in
accordance with EN 10246-8 to acceptance level U3. Calibration shall be carried out using both internal
and external reference notches.
See option 23.
8.5.3.4 Non-destructive testing of seamless hollow sections
All seamless hollow sections shall be ultrasonically tested for longitudinal defects in accordance with
EN 10246-7 to acceptance level U3/C.
When the purchaser has indicated that the seamless hollow section is to be used in primary elements,
they shall be tested in accordance with EN 10246-7 to acceptance level U2/C.
See option 23.
9 Inspection and testing
9.1 General
The products shall be subjected to specific inspection and testing in accordance with EN 10021 and
supplied with an inspection document in accordance with EN 10204. The purchaser shall indicate on the
enquiry and order the type of inspection document required and, where applicable, their nominated
representative.
9.1.1 Ex-mill supply
The relevant inspection documents shall be issued to the purchaser at the time of despatch. An additional
number of copies as defined by the purchaser at the time of the order shall be sent to an address
nominated by the purchaser (see 4.1 e)).
Inspection documentation of types 3.1A, 3.1B, 3.1C or 3.2 in accordance with EN 10204 shall contain at
least the following information:
a) Identification
product form;
mill location;
the purchaser's order and item number where applicable;
method of steel manufacture;
heat or cast number and/or the product identification number(s) where available (see 9.1.3);
dimensions;
designation of steel (see 6.2).
b) Composition
ladle analysis;
product analysis where applicable;
carbon equivalent value where applicable (CEV);
P value where applicable.
cm
c) Heat treatment
details of heat treatment stating nominal temperature, nominal soaking times and cooling
method;
d) Mechanical properties
yield strength, tensile strength, elongation;
yield strength/tensile strength ratio where applicable;
Charpy V-notch impact test results;
through-thickness properties (if required);
strain age test results (if required).
e) Nominal or actual mass
f) Non-destructive test (NDT)
confirmation that NDT has been satisfactorily carried out is to be included on the inspection
document.
In addition to the above certification requirements, the analysis of residual elements and the results of any
additional testing including details of segregation control monitoring requested by the purchaser at the
time of enquiry and order shall be submitted.
Results of weldability testing in accordance with option 18 and annexes E, F and G shall not form any
part of the inspection document.
9.1.2 Merchant supply
If any steel is supplied from a merchant's stock, the merchant 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 including a copy of the mill
inspection document (see 9.1.1) verified by an independent inspection body;
c) satisfying the purchaser by means of numbers or identification marks on the steel (or tab when
parcels of steel are bundled) that such steel has been tested and complies with all the requirements
of this European Standard as applicable.
9.1.3 Identification of cast
The manufacturer shall identify the ingots, billets, slabs, plates, sections and hollow sections etc. in such
a way as to enable the finished product to be traced to the cast from which it was made.
9.1.4 Delivery
Steel shall be delivered together with an accompanying advice note which shall contain the following
minimum information:
mill location;
the purchaser's purchase order and item number if applicable (see 4.1);
cast number and/or the product identification number(s) (see 9.1.3);
the plate/section/hollow section sizes;
steel designation.
10 Sampling
The verification of the mechanical properties for plates, sections and hollow sections shall be by cast.
10.1 Frequency of testing
10.1.1 Tensile tests (General)
A sample product shall be taken for each 40 tonnes or part thereof, of the same thickness range as given
in Table 5, 7, 9 and 11 for the yield strengths, and for the same cast and in the same heat treatment
condition but not showing a thickness variation of more than 5 mm above and below the thickness of the
product sampled. Where ingot practice is used for plates, one sample product shall be taken from each
parent plate.
10.1.2 Impact tests (General)
A sample product shall be taken for each 40 tonnes or part thereof, of the same thickness range as given
in Table 5, 7, 9 and 11 for the yield strengths, and for the same cast and in the same heat treatment
condition.
10.1.3 Additional requirements for welded hollow sections
When required (see option 24) the weld of welded hollow sections shall be subjected to the following
testing:-
Test position Group Frequency
Tensile Impact
a b
Weld 1 1/test unit 1/test unit
a b
Weld 2 and 3 1/test unit 2/test unit
a
For HFW hollow sections with a nominal length of side greater than 150 mm or diameter greater than 219 mm
b
For HFW hollow sections with a nominal length of side greater than 150 mm or diameter greater than 168,3 mm.
10.2 Preparation of samples and test pieces
10.2.1 General
The manufacturer shall randomly sel
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