EN 10028-2:2017

SLOVENSKI STANDARD
01-oktober-2017
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SIST EN 10028-2:2009
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Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels
with specified elevated temperature properties
Flacherzeugnisse aus Druckbehälterstählen - Teil 2: Unlegierte und legierte Stähle mit
festgelegten Eigenschaften bei erhöhten Temperaturen
Produits plats en aciers pour appareils à pression - Partie 2: Aciers non alliés et alliés
avec caractéristiques specifiées à température élevée
Ta slovenski standard je istoveten z: EN 10028-2:2017
ICS:
77.140.30 Jekla za uporabo pod tlakom Steels for pressure purposes
77.140.50 3ORãþDWLMHNOHQLL]GHONLLQ Flat steel products and semi-
SROL]GHONL products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10028-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2017
EUROPÄISCHE NORM
ICS 77.140.30; 77.140.50 Supersedes EN 10028-2:2009
English Version
Flat products made of steels for pressure purposes - Part
2: Non-alloy and alloy steels with specified elevated
temperature properties
Produits plats en aciers pour appareils à pression - Flacherzeugnisse aus Druckbehälterstählen - Teil 2:
Partie 2 : Aciers non alliés et alliés avec Unlegierte und legierte Stähle mit festgelegten
caractéristiques spécifiées à température élevée Eigenschaften bei erhöhten Temperaturen
This European Standard was approved by CEN on 7 May 2017.

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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10028-2:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Tolerances on dimensions . 4
5 Calculation of mass . 4
6 Classification and designation . 4
6.1 Classification . 4
6.2 Designation . 4
7 Information to be supplied by the purchaser . 5
7.1 Mandatory information . 5
7.2 Options . 5
7.3 Example for ordering. 5
8 Requirements . 6
8.1 Steelmaking process . 6
8.2 Delivery condition . 6
8.3 Chemical composition . 6
8.4 Mechanical properties . 10
8.5 Surface condition . 10
8.6 Internal soundness . 10
8.7 Resistance to hydrogen induced cracking . 10
8.8 Embrittlement of CrMo steels . 10
9 Inspection . 10
9.1 Types of inspection and inspection documents . 10
9.2 Tests to be carried out . 10
9.3 Retests, sorting and reprocessing . 10
10 Sampling . 10
11 Test methods . 10
12 Marking . 11
Annex A (informative) Guidelines for heat treatment . 17
Annex B (informative) Critical time temperature parameter P and possible combinations
crit.
of stress relieving temperature and holding time . 18
Annex C (informative) Reference data of strength values for 1 % (plastic) creep strain and
creep rupture . 20
Annex D (normative) Evaluation of resistance to hydrogen induced cracking . 26
Annex E (normative) Step cooling test . 27
Annex F (informative) Changes to the previous version EN 10028-2:2009 . 28
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of European Directive 2014/68/EU . 29
Bibliography. 30
European foreword
This document (EN 10028-2:2017) has been prepared by Technical Committee ECISS/TC 107 “Steels
for pressure purposes”, the secretariat of which is held by DIN.
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 January 2018 and conflicting national standards shall
be withdrawn at the latest by January 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 10028-2:2009.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of Directive 2014/68/EU.
For relationship with Directive 2014/68/EU, see informative Annex ZA, which is an integral part of this
document.
A list of changes between this document and the previous version can be found in Annex F.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
1 Scope
This European Standard specifies requirements for flat products for pressure equipment made of
weldable non-alloy and alloy steels with elevated temperature properties as specified in Table 1.
The requirements and definitions of EN 10028-1:2017 also apply.
NOTE Once this European Standard is published in the EU Official Journal (OJEU) under Directive
2014/68/EU, presumption of conformity to the Essential Safety Requirements (ESRs) of Directive 2014/68/EU is
limited to technical data of materials in this European Standard (Part 1 and this Part 2 of the series) and does not
presume adequacy of the material to a specific item of equipment. Consequently, the assessment of the technical
data stated in this material standard against the design requirements of this specific item of equipment to verify
that the ESRs of Directive 2014/68/EU are satisfied, needs to be done.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 1011-1:2009, Welding - Recommendations for welding of metallic materials - Part 1: General guidance
for arc welding
EN 1011-2:2001, Welding - Recommendations for welding of metallic materials - Part 2: Arc welding of
ferritic steels
EN 10028-1:2017, Flat products made of steels for pressure purposes - Part 1: General requirements
EN 10204:2004, Metallic products - Types of inspection documents
EN 10229:1998, Evaluation of resistance of steel products to hydrogen induced cracking (HIC)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10028-1:2017 apply.
4 Tolerances on dimensions
See EN 10028-1:2017.
5 Calculation of mass
See EN 10028-1:2017.
6 Classification and designation
6.1 Classification
In accordance with EN 10020, the grades P235GH, P265GH, P295GH and P355GH are non-alloy quality
steels. All other grades are alloy special steels.
6.2 Designation
See EN 10028-1:2017.
7 Information to be supplied by the purchaser
7.1 Mandatory information
See EN 10028-1:2017.
7.2 Options
A number of options are specified in this document and listed below. Additionally the relevant options
of EN 10028-1:2017 apply. If the purchaser does not indicate a wish to implement any of these options
at the time of enquiry and order, the products shall be supplied in accordance with the basic
specification (see also EN 10028-1:2017).
1) limitation of copper and/or tin content (see Table 1, footnote b);
2) minimum chromium content of 0,80 % (see Table 1, footnote f);
3) maximum carbon content of 0,17 % for nominal thicknesses greater than 150 mm (see Table 1,
footnote g);
4) tests in the simulated normalized condition (see 8.2.2);
5) delivery conditions deviating from those specified in Table 3 (see 8.2.2 and 8.2.3);
6) maximum carbon equivalent value for P235GH, P265GH, P295GH and P355GH (see 8.3.3);
7) specification of a minimum impact energy of 40 J (see Table 3);
8) no option, intentionally left blank;
9) specification of the delivery condition +QT where the usual delivery condition is +NT (see Table 3,
footnote b and Table 4, footnote b);
10) additional impact energy values (see Table 3, footnote e);
11) no option, intentionally left blank;
12) HIC test in accordance with EN 10229 (see 8.7);
13) step cooling test in accordance with Annex E (see 8.8);
14) mid thickness test pieces for the impact test (see Clause 10)
...