EN 10222-4:2017+A1:2021

SLOVENSKI STANDARD
01-september-2021
Jekleni izkovki za tlačne posode - 4. del: Variva drobnozrnata jekla z veliko
dogovorno napetostjo tečenja
Steel forgings for pressure purposes - Part 4: Weldable fine grain steels with high proof
strength
Schmiedestücke aus Stahl für Druckbehälter - Teil 4: Schweißgeeignete
Feinkornbausstähle mit hoher Dehngrenze
Pièces forgées en acier pour appareils à pression - Partie 4 : Aciers soudables à grains
fins avec limite d'élasticité élevée
Ta slovenski standard je istoveten z: EN 10222-4:2017+A1:2021
ICS:
77.140.30 Jekla za uporabo pod tlakom Steels for pressure purposes
77.140.85 Železni in jekleni kovani Iron and steel forgings
izdelki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10222-4:2017+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 77.140.30; 77.140.85 Supersedes EN 10222-4:2017
English Version
Steel forgings for pressure purposes - Part 4: Weldable fine
grain steels with high proof strength
Pièces forgées en acier pour appareils à pression - Schmiedestücke aus Stahl für Druckbehälter - Teil 4:
Partie 4 : Aciers soudables à grains fins avec limite Schweißgeeignete Feinkornbausstähle mit hoher
d'élasticité élevée Dehngrenze
This European Standard was approved by CEN on 25 December 2016 and includes Amendment 1 approved by CEN on 2 May
2021.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10222-4:2017+A1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification and designation . 4
4.1 Classification . 4
4.2 Designation. 4
5 Information to be supplied by the purchaser . 5
5.1 Mandatory information . 5
5.2 Options . 5
6 Requirements . 5
6.1 Steelmaking process and manufacture of the product . 5
6.2 Delivery condition . 5
6.3 Chemical composition . 5
6.3.1 Cast analysis . 5
6.3.2 Product analysis . 5
6.4 Mechanical properties . 6
6.5 Surface condition . 6
6.6 Internal soundness . 6
6.7 Resistance to hydrogen induced cracking . 6
7 Inspection . 6
8 Sampling . 6
9 Test methods . 6
10 Retests . 6
11 Marking . 7
Annex A (informative) Significant technical changes to the version EN 10222-4:1998 . 13
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU . 14
Bibliography . 15

European foreword
This document (EN 10222-4:2017+A1:2021) has been prepared by Technical Committee
ECISS/TC 459/SC 11 “Steel castings and forgings”, 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 December 2021, and conflicting national standards
shall be withdrawn at the latest by December 2021.
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 supersedes !EN 10222-4:2017".
This document includes Amendment 1 approved by CEN on 11 April 2021.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
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 EU Directive 2014/68/EU.
For relationship with EU Directive 2014/68/EU, see informative Annex ZA, which is an integral part of
this document.
EN 10222 consists of the following parts under the general title “Steel forgings for pressure purposes”:
— Part 1: General requirements for open die forgings
— Part 2: Ferritic and martensitic steels with specified elevated temperature properties
— Part 3: Nickel steels with specified low temperature properties
— Part 4: Weldable fine grain steels with high proof strength
— Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels.
!deleted sentence".
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.
1 Scope
This European Standard specifies the technical delivery conditions for forgings for pressure purposes,
made of weldable fine grain steels with high proof strength.
NOTE Once this 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 standard 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. The series EN 10222–1 to EN 10222–5 is structured so that the data related to different
materials is in the part allocated for that material. The presumption of conformity to the Essential Safety
Requirements of Directive 2014/68/EU depends on both the text in part 1 and the data in part 2, 3, 4 or 5.
General information on technical delivery conditions is given in EN 10021.
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 10222-1:2017, Steel forgings for pressure purposes — Part 1: General requirements
3 Terms and definitions
For the purpose of this document, the terms and definitions given in EN 10222-1:2017 apply.
4 Classification and designation
4.1 Classification
!In accordance with the classification system in EN 10020, the steel grades specified in this document
are non-alloy quality steels (P285NH, P285QH, P355NH, P355NL1), non-alloy special steel (P355NL2)
and alloy special steels (P355QH1, P355QL1, P355QL2, P420NH, P420QH, P460QH, P460QL1,
P460QL2)."
4.2 Designation
See EN 10222-1:2017.
5 Information to be supplied by the purchaser
5.1 Mandatory information
Shall be in accordance with EN 10222-1:2017.
5.2 Options
A number of options are specified in this document and listed below. Additionally, the relevant options
of EN 10222-1:2017 apply.
1) test temperature for the tensile test at elevated temperature, if applicable (see 6.4);
2) carbon equivalent for non-alloy steels (see Table 2, footnote b);
3) higher Al content (see Table 2, footnote c);
4) higher sulphur content (see Table 2, footnote f);
5) !delivery of steel grade P460N in normalized condition and determination of mechanical
properties (see Table 4, footnote e, Table 5, footnote e, and Table 6, footnote a)";
6) different test temperature for the min. impact energy (see Table 5, footnote c);
7) minimum impact energy values (see Table 5 footnote d);
8) test to evaluate the resistance to hydrogen induced cracking (see 6.7).
6 Requirements
6.1 Steelmaking process and manufacture of the product
Shall be in accordance with EN 10222-1:2017.
6.2 Delivery condition
!The products shall be delivered in the heat treatment condition specified in Table 1. Delivery of steel
grades P460QH, P460QL1 and P460QL2 in normalized condition (P460N) may be agreed at the time of
enquiry and order."
6.3 Chemical composition
6.3.1 Cast analysis
The chemical composition (cast analysis), determined in accordance with EN 10222-1:2017 shall
conform to the requirements of Table 2.
6.3.2 Product analysis
The product analysis shall not deviate from the specified cast analysis (see Table 2) by more than the
values specified in Table 3.
6.4 Mechanical properties
When heat treated in accordance with Table 1, the mechanical properties shall conform to the
requirements of Tables 4 and 5.
) values shall conform to the requirements of Table 6.
Elevated temperature proof strength (RP0,2
If verification of specified proof strength at elevated temperature is requested (see option in
EN 10222-1:2017), the testing temperature should be agreed at the time of enquiry and order.
Otherwise, the test shall be carried out at 300 °C.
6.5 Surface condition
See EN 10222-1:2017.
6.6 Internal soundness
See EN 10222-1:2017.
6.7 Resistance to hydrogen induced cracking
Steels covered by this standard may be susceptible to cracking when exposed to corrosive H S
containing environments, usually referred to as „sour service“.
A test to evaluate the resistance to hydrogen indu
...