SIST EN 13445-2:2021+A1:2023/oprA2:2026

• Abstract:

  This document specifies the requirements for steel products used for unfired pressure vessels.; For some metallic materials other than steel, such as spheroidal graphite cast iron, aluminium, nickel, copper, titanium, requirements are or will be formulated in separate parts of this document.; For metallic materials which are not covered by a harmonized material standard and are not likely to be in near future, specific rules are given in this part or the above cited parts of this document.

• Status: Not Published
• Public Enquiry End Date: 01-Mar-2025
• ICS: 23.020.30 - Pressure vessels, gas cylinders
• ICS: 23.020.32 - Pressure vessels
• Technical Committee: TLP - Pressure vessels
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 17-Dec-2025
• Due Date: 06-May-2026
• Completion Date: 20-Feb-2026
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/601 - COMMISSION IMPLEMENTING DECISION of 1.3.2024 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards pressure equipment and assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council
• Ref Project: EN 13445-2:2026/prA1 - Unfired pressure vessels - Part 2: Materials

• Amends: SIST EN 13445-2:2026 - Unfired pressure vessels - Part 2: Materials
• Effective Date: 29-Apr-2026
• Revises: SIST EN 13445-2:2021+A1:2023 - Unfired pressure vessels - Part 2: Materials
• Effective Date: 01-Feb-2026

SIST EN 13445-2:2021+A1:2023/oprA2:2026 is the Slovenian draft amendment to EN 13445-2 from SIST and CEN. It covers the materials part of unfired pressure vessels and specifies how steel products, selected non-pressure parts, and brittle-fracture-sensitive materials are handled in pressure-vessel design and fabrication. Designers, fabricators, material suppliers, and inspectors use it to choose acceptable materials and determine the related design values.

What does SIST EN 13445-2:2021+A1:2023/oprA2:2026 specify?

SIST EN 13445-2:2021+A1:2023/oprA2:2026 specifies requirements for steel products used for unfired pressure vessels. It also points to separate parts for other metallic materials such as spheroidal graphite cast iron, aluminium, nickel, copper, and titanium, and it gives specific rules for metallic materials that are not covered by a harmonized material standard.

The amendment is organized as targeted changes to the existing part:

Section	What it covers
Clause 2	Updated normative references
Clause 5	Materials for non-pressure parts
B.2.2	Method 1 for material selection and brittle fracture prevention
B.2.3	Method 2 for impact testing and temperature selection
E.2	European standardised steels grouped by product form
Annex ZA	Link to EU Directive 2014/68/EU
Bibliography	Supporting standards and cross-references

What are the key requirements of SIST EN 13445-2:2021+A1:2023/oprA2:2026?

Clause 5 and Annex B are the main technical focus of this amendment. They set how to select materials, how to derive design-relevant strength values, and how to check brittle fracture behaviour for different product forms.

Materials for non-pressure parts

Clause 5 says that non-pressure parts welded to a vessel, such as supporting lugs, skirts, baffles and similar parts, shall use materials with specifications that cover at least chemical composition and tensile properties. Those parts shall also not restrict the operating conditions of the material they are attached to. In practice, a support or attachment must not become the limiting item for temperature or service conditions.

Strength values for ferritic and structural steels

Clause 5.2 gives the basis for yield strength and tensile strength of steels other than austenitic steels used for non-pressure parts. Where a steel has specified minimum 0,2 % proof strength at elevated temperatures, that property is used above 20 °C according to the procedure in 4.2.2. For structural steels without elevated-temperature properties, the room-temperature yield strength may be used up to 50 °C, then reduced using the factors in Table 5-1 with linear interpolation.

This matters because the designer has to convert material certificate data into usable design values at the actual service temperature. Clause 5.2.3 then links those material properties to the maximum nominal design stress for normal operating, exceptional, and test load cases, together with the safety factors in EN 13445-3:2021, Clause 6.

Strength values for austenitic steels

Clause 5.3 covers austenitic steels used for non-pressure parts. Where elevated-temperature 0,2 % proof strength is specified, the same procedure as in 4.2.2 applies. Where it is not specified, tensile strength above 20 °C is calculated using the formula in 5.3.2 and the reduction factors in Table 5-3.

For the user, this means austenitic materials are not handled by the same temperature reduction logic as ferritic steels. The document gives a separate calculation route so the allowable stress can be set consistently for these materials.

Method 1 for brittle fracture prevention

Annex B.2.2 updates Method 1 with revised guide tables for material selection. The tables group plates, strips, tubes, bars, forgings, fittings, castings, fasteners, bolts, nuts, and austenitic grades by steel group and reference thickness. They also show temperature limits and notes tied to the relevant product standards.

In practice, Method 1 is the table-based route for checking whether a chosen product form and grade can be used for the intended service temperature and thickness.

Method 2 for impact testing at low temperature

Annex B.2.3 adds a rule for applications below the dotted line in Figures B.2-2 and B.2-4. For those cases, steels shall be impact tested at -40 °C or at a lower temperature. The figures also show how the material impact test temperature T_KV relates to the design reference temperature T_R and the reference thickness e_B.

This is the practical low-temperature route: the closer the service condition is to the lower-temperature zone, the stricter the impact test temperature becomes.

Product-form grouping and special restrictions

Annex E.2 replaces the main grouping table for European standardised steels by product form. The updated table covers plate and strip, bars, seamless tube, welded tube, forgings, castings, fittings, and fasteners, and it keeps the notes that control use limits.

The table also reflects several practical restrictions. TMCP steels shall not be hot formed, certain fasteners shall not be welded, and ferritic stainless steels are limited to -10 °C and above. For bolting, the amendment identifies specific material grades that can be used when bolt design is calculated according to EN 13445-3:2021, provided the stated material requirements are met.

What terms does SIST EN 13445-2:2021+A1:2023/oprA2:2026 define?

• AW - The as-welded condition, used in Method 2 figures for deciding impact test temperature.
• PWHT - Post weld heat treatment, a heat-treatment step that the document links to minimum temperatures and fabrication rules.
• TMCP - Thermomechanically treated steels, which the document treats differently from conventionally processed steels.
• T_R - Design reference temperature, the temperature basis used in Annex B.2.3 for brittle fracture assessment.
• T_KV - Material impact test temperature, the temperature at which impact testing is set in Method 2.
• e_B - Reference thickness, the thickness parameter used together with temperature in the brittle-fracture tables and figures.
• KV - The impact energy criterion used in the Method 2 figures for low-temperature assessment.
• 0,2 % proof strength - The stress level used as the yield-property basis for several steel classes at elevated temperature.

Who uses SIST EN 13445-2:2021+A1:2023/oprA2:2026?

This part of EN 13445 is used by people who specify, buy, make, check, or approve materials for unfired pressure vessels. Typical users include:

• pressure vessel designers and calculation engineers
• material engineers and metallurgists
• buyers and procurement staff ordering plates, strips, tubes, forgings, castings, fittings, bolts, and nuts
• fabricators who need to know welding, hot-forming, and heat-treatment limits
• inspection and quality teams checking certificates, impact tests, and product-form compliance

In practice, they use it to decide whether a material grade is acceptable, what test temperature is needed, and what strength value may be used in design.

What changed in SIST EN 13445-2:2021+A1:2023/oprA2:2026 from the previous edition?

SIST EN 13445-2:2021+A1:2023/oprA2:2026 modifies EN 13445-2:2021+A1:2023. The amendment states these changes:

• Clause 2 updates the normative references to the current editions of EN 13445-4 and EN 13445-5.
• Clause 2 adds references for stainless steel products, steel castings, and butt-welding pipe fittings.
• Clause 5 is replaced with new text for non-pressure parts and temperature-dependent strength values.
• Annex B.2.2 updates the Method 1 tables for brittle fracture prevention and material selection.
• Annex B.2.3 updates Method 2 and adds the low-temperature impact-testing rule.
• Annex E.2 replaces the grouping table for European standardised steels by product form.
• Annex ZA is rewritten to reflect the current directive relationship wording.
• The bibliography is updated with new and revised supporting references.

Which standards are used with SIST EN 13445-2:2021+A1:2023/oprA2:2026?

• EN 13445-3:2021 - supplies the safety factors and design-stress framework used in Clause 5.
• EN 13445-4:2021+A1:2023 - provides fabrication rules, including heat treatment and hot-forming constraints.
• EN 13445-5:2021+A1:2024 - provides inspection and testing requirements used alongside the materials rules.
• EN 10088-2:2024, EN 10088-3:2023, EN 10088-4:2009, EN 10088-5:2009 - provide technical delivery conditions for stainless steels used in Clause 5.
• EN 10213:2007+A1:2016 - provides requirements for steel castings for pressure purposes and related heat-treatment guidance.
• EN 10253-2:2021 - provides requirements for non-alloy and ferritic alloy butt-welding fittings with specific inspection requirements.
• EN 10222-5:2017 - appears in the bibliography as a supporting standard for stainless steel forgings for pressure purposes.
• EN 10253-4:2008 - appears in the bibliography as a supporting standard for austenitic and austenitic-ferritic butt-welding fittings.

What does the SIST EN 13445-2:2021+A1:2023/oprA2:2026 document contain?

The document contains replacement tables, formulas, figures, and reference lists rather than a full rewritten standard. Its technical content includes the reduction factors in Tables 5-1 and 5-3, the list of steels in Table 5-2, and the Method 1 and Method 2 brittle-fracture selection material in Annex B.

It also contains the enlarged product-form grouping table in Annex E.2, which is the main lookup tool for matching a material grade to a product form and use note.

Annex ZA gives the relationship to Directive 2014/68/EU, so the document can be used in the pressure-equipment conformity context. The bibliography then points to the product standards that support the material tables and special cases.

SLOVENSKI STANDARD
01-februar-2026
Nekurjene tlačne posode - 2. del: Materiali - Dopolnilo A2
Unfired pressure vessels - Part 2: Materials
Unbefeuerte Druckbehälter - Teil 2: Werkstoffe
Récipients sous pression non soumis à la flamme - Partie 2 : Matériaux
Ta slovenski standard je istoveten z: EN 13445-2:2021+A1:2023/prA2
ICS:
23.020.32 Tlačne posode Pressure vessels
SIST EN 13445- en,fr,de
2:2021+A1:2023/oprA2:2026
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 13445-
NORME EUROPÉENNE
2:2021+A1:2023
EUROPÄISCHE NORM
prA2
December 2025
ICS 23.020.30
English Version
Unfired pressure vessels - Part 2: Materials
Récipients sous pression non soumis à la flamme - Unbefeuerte Druckbehälter - Teil 2: Werkstoffe
Partie 2 : Matériaux
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 54.

This draft amendment A2, if approved, will modify the European Standard EN 13445-2:2021+A1:2023. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-2:2021+A1:2023/prA2:2025
worldwide for CEN national Members. E

EN 13445-2:2021+A1:2023/prA2:2025 (E)
Contents Page
European foreword . 3
1 Modifications to Clause 2, “Normative references” . 4
2 Modifications to Clause 5, “Requirements for materials to be used for non-pressure
parts” . 4
3 Modifications to B.2.2, “Method 1” . 6
4 Modifications to B.2.3, “Method 2” . 11
5 Modifications to E.2, “European standardised steels grouped according to product
forms” . 13
6 Modifications to Annex ZA, “Relationship between this European Standard and the
Essential Requirements of EU Directive 2014/68/EU aimed to be covered” . 40

EN 13445-2:2021+A1:2023/prA2:2025 (E)
European foreword
This document (EN 13445-2:2021+A1:2023/prA2:2025) has been prepared by Technical Committee
CEN/TC 54 “Unfired pressure vessels”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of
EN 13445-2:2021.
This document includes the text of the amendment itself. The amendment will be consolidated within
EN 13445-2:2021+A1:2023 in accordance with the maintenance system of EN 13445 series approved by
the CEN/BT Decision C172/2021.
EN 13445-2:2021+A1:2023/prA2:2025 (E)
1 Modifications to Clause 2, “Normative references”
Replace the following normative references:
“EN 13445-4:2021, Unfired pressure vessels — Part 4: Fabrication
EN 13445-5:2021, Unfired pressure vessels — Part 5: Inspection and testing”
with:
“EN 13445-4:2021+A1:2023, Unfired pressure vessels — Part 4: Fabrication
EN 13445-5:2021+A1:2024, Unfired pressure vessels — Part 5: Inspection and testing”
and update the references throughout the text.
Add the following new normative references:
“EN 10088-2:2024, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip of
corrosion resistant steels for general purposes
EN 10088-3:2023, Stainless steels — Part 3: Technical delivery conditions for semi-finished products, bars,
rods, wire, sections and bright products of corrosion resistant steels for general purposes
EN 10088-4:2009, Stainless steels — Part 4: Technical delivery conditions for sheet/plate and strip of
corrosion resisting steels for construction purposes
EN 10088-5:2009, Stainless steels — Part 5: Technical delivery conditions for bars, rods, wire, sections and
bright products of corrosion resisting steels for construction purposes
EN 10213:2007+A1:2016, Steel castings for pressure purposes
EN 10253-2:2021, Butt-welding pipe fittings — Part 2: Non alloy and ferritic alloy steels with specific
inspection requirements”.
2 Modifications to Clause 5, “Requirements for materials to be used for
non-pressure parts”
Replace the current text of Clause 5 with the following:
"5 Requirements for materials to be used for non-pressure parts
5.1 General
For non-pressure parts, e.g. for supporting lugs, skirts, baffles and similar parts welded to pressure
vessels, materials shall be used which are supplied to material specifications covering at least
requirements for the chemical compositions and tensile properties.
These materials shall not limit the operating conditions of the material to which they are attached.
5.2 Yield strength and tensile strength of steels other than austenitic steels used for non- pressure
parts
5.2.1 For steel with specified minimum values of 0,2 % proof strength at elevated temperatures,
including ferritic and austenitic-ferritic steels in the annealed condition according to EN 10088-2:2024
and EN 10088-3:2023, the 0,2 % proof strength above 20 °C shall be determined in accordance with the
procedure as specified in 4.2.2.
5.2.2 For structural steels without specified elevated temperature properties, including those listed in
Table 5-2, the specified value of minimum yield strength R at room temperature can be used for R
eH p0,2/T
at temperatures less than or equal to 50 °C . The yield strength reduction factor for higher temperatures
are given in Table 5-1.
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Table 5-1 — Yield strength reduction factor for structural steel
Temperature °C 20 100 150 200 250 300 350
Factor K 1,000 0,800 0,730 0,660 0,590 0,520 0,450
c
Linear interpolation shall be performed between the values given in Table 5-1. For temperatures between
50 °C and 100 °C, interpolation shall be performed between 20 °C and 100 °C.
The values of the minimum yield strength R and tensile strength R shall be as given in the technical
eH m
specification for the material.
Table 5-2 — Steels used for non-pressure parts
Standard Steel grade
S235JR, S235J0, S235J2
EN 10025-2:2019 S275JR, S275J0, S275J2
S355JR, S355J0, S355J2, S355K2
S275N, S275NL
EN 10025-3:2019 S355N, S355NL
S275M, S275ML
EN 10025-4:2019+A1:2022 S355M, S355ML
S235J0W, S235J2W
EN 10025-5:2019 S355J0W. S355J2W, S355K2W
S355J0WP, S3J2WP
S235JRH
S275J0H, S275J2H
EN 10210-1:2006 S275NH, S275NHL
S355J0H, S355J2H, S355K2H
S355NH, S355NLH
S235JRH
EN 10219-1:2006 S275J0H, S275J2H
S275NH, S275NLH, S275MH,
S275MLH
S355J0H, S355J2H, S355K2H,
S355NH, S355NLH, S355MH,
S355MLH
5.2.3 The maximum values of the nominal design stress for normal operating, exceptional and testing
load cases shall be determined from the material properties as specified in 5.2.1 or 5.2.2 and the safety
factors given in EN 13445-3:2021, Clause 6.
EN 13445-2:2021+A1:2023/prA2:2025 (E)
5.3 Yield strength and tensile strength of austenitic steels used for non-pressure parts
5.3.1 For austenitic steels with specified minimum values of 0,2 % proof strength at elevated
temperatures, including austenitic steels according to EN 10088-2:2024, EN 10028-3:2023,
EN 10088-4:2009 and EN 10088-5:2009, the 0,2 % proof strength above 20 °C shall be determined in
accordance with the procedure as specified in 4.2.2.
5.3.2 For austenitic steels without specified minimum values of 0,2 % proof strength at elevated
temperatures, including austenitic steels according to EN 10088-2:2024, EN 10028-3:2023,
EN 10088-4:2009 and EN 10088-5:2009, the tensile strength above 20 °C shall be calculated as follows:
R = K *R (5.3-1)
m/T m m/20
where
K is obtained from Formula (5.3-2) or Table 5-3.
m
K = max (1,07-0,003 5*T; 0,82-000 09*T; 0,688-0,000 24*T) (5.3-2)
m
where
T is the temperature in °C.
Table 5-3 — Tensile strength reduction factor for austenitic steels
Temperature °C 20 50 100 150 200 250 300 350 400
Factor K 1,000 0,895 0,730 0,685 0,640 0,628 0,616 0,604 0,592
m
5.3.3 The maximum values of the nominal design stress for normal operating, exceptional and testing
condition shall be determined from the material properties as specified in 5.3.1 or 5.3.2 and the safety
factors given in EN 13445-3:2021, Clause 6.".
3 Modifications to B.2.2, “Method 1”
Replace Tables B.2-1, B.2-2, B.2-3, B.2-4, B.2-5, B.2-6 and B.2-7 with the following:
"Table B.2-1 ― Guide to material selection
Table Material or product form Steel group Clause
B.2-2 Plates and strips
B.2-3 Seamless and welded pipes
Ferritic steels B.2.2.2
B.2-4 Bars, forgings and fittings
B.2-5 Ferritic castings
Ni alloyed steels and castings
B.2-6
(1,5 < Ni ≤ 5 %)
Ferritic steels B.2.2.3
B.2-7 Ni-alloyed steel (9 % Ni)
B.2-8
Ferritic steels
B.2-9 Bolts and nuts B.2.2.4
Austenitic steels
B.2-10
B.2-11 Austenitic steel grades Austenitic steels B.2.2.5
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Table B.2-2 — General requirements for prevention of brittle fracture — Reference thicknesses
for plates and strips
Plates and strips
Max. reference
Design
Material
thickness
European
reference
Material
group to
e
B temperature
standard Grade Notes
CEN ISO/TR
No.
mm T
R
15608:2017
°C
AW PWHT
P235GH 1.0345 35 200
1.1
P265GH 1.0425 35 200
EN 10028-2:2017 – 20
P295GH 1.0481 35 110
1.2
P355GH 1.0473 35 70
P275NH 1.0487 35 200 – 20
P275NL1 1.0488 35 200 – 40 1.1
P275NL2 1.1104 35 200 – 50
EN 10028-3:2017 P355N 1.0562 35 70 – 20
P355NH 1.0565 35 70 – 20
1.2
P355NL1 1.0566 35 70 – 40
P355NL2 1.1106 35 70 – 50
11MnNi5-3 1.6212 35 80 – 60
EN 10028-4:2017 13MnNi6-3 1.6217 35 70 – 60 9.1
15NiMn6 1.6228 35 70 – 80
a
P355M 1.8821 35 - – 20
a
P355ML1 1.8832 35 - – 40 1.2
a
P355ML2 1.8833 35 - – 50
EN 10028-5:2017
a
P420M 1.8824 35 - – 20
a
P420ML1 1.8835 35 - – 40 2.1
a
P420ML2 1.8828 35 - – 50
P355Q 1.8866 35 70 – 20
P355QH 1.8867 35 70 – 20
EN 10028-6:2017 1.2
P355QL1 1.8868 35 70 – 40
P355QL2 1.8869 35 70 – 60
a
TMCP steels shall not be Post Weld Heat Treated.
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Table B.2-3 — General requirements for prevention of brittle fracture — Reference thicknesses
for seamless and welded tubes
Seamless and welded tubes
Max. reference
Design
Material
thickness
reference
European Material
group to
e
B temperature
Grade Notes
CEN ISO/TR
standard No.
mm T
R
15608:2017
°C
AW PWHT
a
P275NL1 1.0488 35 100 – 40
1.1
a
P275NL2 1.1104 35 100 – 50
P355N 1.0562 35 70 – 20
EN 10216-3:2013
P355NH 1.0565 35 70 – 20
1.2
P355NL1 1.0566 35 70 – 40
P355NL2 1.1106 35 70 – 50
a
P215NL 1.0451 10 10 – 40
a
P255QL 1.0452 35 40 – 40 1.1
a
P265NL 1.0453 25 25 – 40
EN 10216-4:2013
a
26CrMo4-2 1.7219 15 40 – 60 5.1
a
11MnNi5-3 1.6212 35 40 – 60 9.1
a
13MnNi6-3 1.6217 35 40 – 60 9.1
a
P275NL1 1.0488 35 40 – 40
1.1
a
P275NL2 1.1104 35 40 – 50
a
P355N 1.0562 35 40 – 20
EN 10217-3:2019
a
P355NH 1.0565 35 40 – 20
1.2
a
P355NL1 1.0566 35 40 – 40
a
P355NL2 1.1106 35 40 – 50
a
P215NL 1.0451 10 10 – 40 1.1
EN 10217-4:2019
a
P265NL 1.0453 16 16 – 40 1.1
a
P215NL 1.0451 10 10 – 40 1.1
EN 10217-6:2019
a
P265NL 1.0453 25 25 – 40 1.1
a
Thickness limitation results from wall thickness limitation in the European material standards and in the European
component standards respectively.

EN 13445-2:2021+A1:2023/prA2:2025 (E)
Table B.2-4 — General requirements for prevention of brittle fracture with reference thickness
for bars, forgings and fittings
Bars, forgings and fittings
Max. reference
Design
Material
thickness
European Material reference
group to
Grade Notes
temperature
e CEN ISO/TR
B
standard No.
15608:2017
TR (°C)
AW PWHT
P275NH 1.0487 35 75 1.1
EN 10273:2016 P355NH 1.0565 35 55 – 20 1.2
P355QH 1.8867 35 55 1.2
EN 10222-3:2017 13MnNi6-3 1.6217 35 50 – 60 9.1
15NiMn6 1.6228 35 50 – 80 9.1
P285QH 1.0478 35 85 – 20 1.2
P355QH1 1.0571 35 60 – 20 1.2
P420QH 1.8936 35 50 – 20 3.1
P285NH 1.0477 35 95 – 20 1.2
P355NH 1.0565 35 70 – 20 1.2
P420NH 1.8932 35 67 – 20 1.3
EN 10222-
P355NL1 1.0566 35 70 – 40 1.2
4:2017+A1:2021
P355NL2 1.1106 35 70 – 50 1.2
P355QL1 1.8868 35 70 – 40 1.2
P355QL2 1.8869 35 70 – 40 1.2
P460QH 1.8871 35 65 – 20 3.1
P460QL1 1.8872 35 65 – 40 3.1
P460QL2 1.8864 35 65 – 50 3.1
EN 10253-2:2021 P355N 1.0562 35 70 – 20 1.2
P355NH 1.0565 35 70 – 20 1.2
P355NL1 1.0566 35 70 – 40 1.2
P215NL 1.0451 10 10 – 40 1.1
P265NL 1.0453 25 25 – 40 1.1
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Table B.2-5 — General requirements for prevention of brittle fracture with reference thickness
for ferritic castings
Ferritic castings
Max. reference
Design
Material
European
thickness
Material reference
group to
standard Grade Notes
temperature
e CEN ISO/TR
B
No.
15608:2017
TR (°C)
a
-
EN 10213:2007+ G17Mn5 1.1131 50 – 40 1.1
A1:2016
G20Mn5 1.6220 100 – 30 1.2
G18Mo5 1.5422 100 – 45 1.1
a
Heat treatment as specified in EN 10213:2007+A1:2016.

Table B.2-6 — General requirements for prevention of brittle fracture with reference thickness
for Ni-alloyed steels with 1,5 % < Ni ≤ 5 %
a
Ni-alloyed steel, 1,5 % < Ni ≤ 5 %
Max. reference
Design
Material
European
thickness
Material reference
group to
standard Grade Notes
e temperature
B CEN ISO/TR
No.
15608:2017
T (°C)
R
AW PWHT
plates and strips
b
12Ni14 1.5637 35 80 – 100
EN 10028-4:2017 9.2
X12Ni5 1.5680 35 50 – 120
seamless tubes
b
12Ni14 25 ― – 100
1.5637
b
12Ni14 35 40 – 90
EN 10216-4:2013 9.2
X12Ni5 25 ― – 120
1.5680
X12Ni5 35 40 – 110
fittings
b
12Ni14 1.5637 25 ― – 100
EN 10253-2:2021 9.2
b
12Ni14 35 40 – 90
forgings
b
12Ni14 35 ―
b
12Ni14 1.5637 35 50 – 100
b
EN 10222-3:2017 12Ni14 35 70 9.2
X12Ni5 35 ―
1.5680 – 120
X12Ni5 35 50
EN 13445-2:2021+A1:2023/prA2:2025 (E)
a
Ni-alloyed steel, 1,5 % < Ni ≤ 5 %
Max. reference
Design
Material
European
thickness
Material reference
group to
standard Grade Notes
e temperature
B CEN ISO/TR
No.
15608:2017
T (°C)
R
AW PWHT
castings
c, d
G9Ni10 1.5636 As per – 70 9.1
EN
G17NiCrMo 13-6 1.6781 – 80 9.2
EN 10213:2007+A1:
10213:2007+A1:
G9Ni14 1.5638 – 90 9.2
2016, Table 3
GXCrNi13-4 1.6982 – 120 9.2
NOTE Thickness limitation result from wall thickness limitation in European material standards.

a
Nickel content is nominal.
b
If used at – 105 °C (e. g. ethylene application), then 27 J shall be guaranteed at this temperature.
c
See EN 10213:2007+A1:2016, Table A.1 for recommended preheating and interpass temperature when welding is applied.
d
PWHT, if required, shall be performed in accordance with EN 13445-4:2021+A1:2023, Clause 10 with a minimum temperature
not lower than the temperature specified in EN 10213:2007+A1:2016, Table A.1.

Table B.2-7 — General requirements for prevention of brittle fracture with reference thickness
for Ni-alloyed steels with 9 % Ni
a
9 % - Ni alloys
Max. reference
Material
Design
European
group to
thickness
Material reference
standard Grade CEN ISO/TR Notes
temperature
eB
No.
15608:201
TR (°C)
AW PWHT
plates and strips
b
X8Ni9 1.5662
EN 10028-4:2017 ― – 196 9.3
b
X7Ni9 1.5663
seamless tubes and fittings
EN 10216-4:2013
b
X10Ni9 1.5682 ― – 196 9.3
EN 10253-2:2021
forgings
b
EN 10222-3:2017 X8Ni9 1.5662 ― – 196 9.3
a
Nickel content is nominal.
b
Materials can be used to maximum thickness permitted in harmonized European material standards.
”.
4 Modifications to B.2.3, “Method 2”
Add the following text before Table B.2-13 in B.2.3.1:
"For applications that fall below the dotted line in the Figures B.2-2 and B.2-4 (T below -60 °C with
R
T = 0 °C), steels shall be impact tested at -40 °C or at lower temperatures.".
A
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Replace Figures B.2-2 and B.2-4 in B.2.3.3 with the following:
“
Key
T design reference temperature
R
T material impact test temperature
KV
e reference thickness
B
For applications that fall below the dotted line (T below -60 °C with T = 0 °C), test temperature T shall
R A KV
not be higher than -40 °C independent of thickness e .
B
If any combination of thickness e and T result in a lower test temperature T as -40 °C, the lower test
B R KV
temperature shall be taken, always rounded up to the next lowest level (e.g T =-63 °C becomes T = -
KV KV
70 °C).
Figure B.2-2 — METHOD 2: Design reference temperature and impact test temperature as-
welded (AW) condition, for Re ≤ 265 MPa and KV ≥ 27 J
EN 13445-2:2021+A1:2023/prA2:2025 (E)

Key
T design reference temperature
R
T material impact test temperature
KV
e reference thickness
B
For applications that fall below the dotted line (T below -60 °C with T = 0 °C), test temperature T shall
R A KV
not be higher than -40 °C independent of thickness e .
B
If any combination of thickness e and T result in a lower test temperature T as -40 °C, the lower test
B R KV
temperature shall be taken, always rounded up to the next lowest level (e.g T =-63 °C becomes T = -
KV KV
70 °C).
Figure B.2-4 — METHOD 2: Design reference temperature and impact test temperature as-
welded (AW) condition, Re ≤ 355 MPa and KV ≥ 27 J
.”
5 Modifications to E.2, “European standardised steels grouped according to
product forms”
Delete the first sentence.
Replace Table E.2-1 with the following:

EN 13445-2:2021+A1:2023/prA2:2025 (E)
“Table E.2-1 — European standardised steels grouped according to product forms
Material
Max.
European Material group to
b
Product form Grade thickness Notes
standard number CEN ISO/TR
mm
15608:2017
plate and strip EN 10028-2 P235GH 1.0345 250 1.1
plate and strip EN 10028-2 P265GH 1.0425 250 1.1
plate and strip EN 10028-2 P295GH 1.0481 250 1.2
plate and strip EN 10028-2 P355GH 1.0473 250 1.2

plate and strip EN 10028-2 16Mo3 1.5415 250 1.2
plate and strip EN 10028-2 18MnMo4-5 1.5414 250 1.2
plate and strip EN 10028-2 20MnMoNi4-5 1.6311 250 3.1
plate and strip EN 10028-2 15NiCuMoNb5-6-4 1.6368 200 3.1
plate and strip EN 10028-2 13CrMo4-5 1.7335 250 5.1
plate and strip EN 10028-2 13CrMoSi5-5 1.7336 100 5.1
plate and strip EN 10028-2 10CrMo9-10 1.7380 250 5.2
plate and strip EN 10028-2 12CrMo9-10 1.7375 250 5.2
plate and strip EN 10028-2 X12CrMo5 1.7362 250 5.3
plate and strip EN 10028-2 13CrMoV9-10 1.7703 250 6.2
plate and strip EN 10028-2 12CrMoV12-10 1.7767 250 6.2
plate and strip EN 10028-2 X10CrMoVNb9-1 1.4903 250 6.4
plate and strip EN 10028-3 P275NH 1.0487 250 1.1
plate and strip EN 10028-3 P275NL1 1.0488 250 1.1
plate and strip EN 10028-3 P275NL2 1.1104 250 1.1
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Material
Max.
European Material group to
b
Product form Grade thickness Notes
standard number CEN ISO/TR
mm
15608:2017
plate and strip EN 10028-3 P355N 1.0562 250 1.2
plate and strip EN 10028-3 P355NH 1.0565 250 1.2
plate and strip EN 10028-3 P355NL1 1.0566 250 1.2
plate and strip EN 10028-3 P355NL2 1.1106 250 1.2
plate and strip EN 10028-3 P420NH 1.8932 250 1.3
plate and strip EN 10028-3 P420NL1 1.8912 250 1.3
plate and strip EN 10028-3 P420NL2 1.8913 250 1.3
plate and strip EN 10028-3 P460NH 1.8935 250 1.3
plate and strip EN 10028-3 P460NL1 1.8915 250 1.3
plate and strip EN 10028-3 P460NL2 1.8918 250 1.3
plate and strip EN 10028-4 11MnNi5-3 1.6212 80 9.1
plate and strip EN 10028-4 13MnNi6-3 1.6217 80 9.1
plate and strip EN 10028-4 15NiMn6 1.6228 80 9.1
plate and strip EN 10028-4 12Ni14 1.5637 80 9.2
plate and strip EN 10028-4 X12Ni5 1.5680 50 9.2
plate and strip EN 10028-4 X8Ni9+QT640 1.5662 125 9.3
plate and strip EN 10028-4 X8Ni9+QT680 1.5662 125 9.3
plate and strip EN 10028-4 X7Ni9 1.5663 125 9.3
d
plate and strip EN 10028-5 P355M 1.8821 63 1.2
d
plate and strip EN 10028-5 P355ML1 1.8832 63 1.2
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Material
Max.
European Material group to
b
Product form Grade thickness Notes
standard number CEN ISO/TR
mm
15608:2017
d
plate and strip EN 10028-5 P355ML2 1.8833 63 1.2
d
plate and strip EN 10028-5 P420M 1.8824 63 2.1
d
plate and strip EN 10028-5 P420ML1 1.8835 63 2.1
d
plate and strip EN 10028-5 P420ML2 1.8828 63 2.1
d
plate and strip EN 10028-5 P460M 1.8826 63 2.1
d
plate and strip EN 10028-5 P460ML1 1.8837 63 2.1
d
plate and strip EN 10028-5 P460ML2 1.8831 63 2.1
plate and strip EN 10028-6 P355Q 1.8866 200 1.2
plate and strip EN 10028-6 P355QH 1.8867 200 1.2
plate and strip EN 10028-6 P355QL1 1.8868 200 1.2
plate and strip EN 10028-6 P355QL2 1.8869 200 1.2
plate and strip EN 10028-6 P460Q 1.8870 200 3.1
plate and strip EN 10028-6 P460QH 1.8871 200 3.1
plate and strip EN 10028-6 P460QL1 1.8872 200 3.1
plate and strip EN 10028-6 P460QL2 1.8864 200 3.1
plate and strip EN 10028-6 P500Q 1.8873 200 3.1
plate and strip EN 10028-6 P500QH 1.8874 200 3.1
plate and strip EN 10028-6 P500QL1 1.8875 200 3.1
plate and strip EN 10028-6 P500QL2 1.8865 200 3.1
plate and strip EN 10028-6 P690Q 1.8879 200 3.1
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Material
Max.
European Material group to
b
Product form Grade thickness Notes
standard number CEN ISO/TR
mm
15608:2017
plate and strip EN 10028-6 P690QH 1.8880 200 3.1
plate and strip EN 10028-6 P690QL1 1.8881 200 3.1
plate and strip EN 10028-6 P690QL2 1.8888 200 3.1
plate and strip EN 10028-7 X2CrNiN18-7 1.4318 75 8.1
plate and strip EN 10028-7 X2CrNi18-9 1.4307 75 8.1
plate and strip EN 10028-7 X2CrNi19-11 1.4306 75 8.1
plate and strip EN 10028-7 X2CrNiN18-10 1.4311 75 8.1
plate and strip EN 10028-7 X5CrNi18-10 1.4301 75 8.1
plate and strip EN 10028-7 X5CrNiN19-9 1.4315 75 8.1
plate and strip EN 10028-7 X6CrNi18-10 1.4948 75 8.1
plate and strip EN 10028-7 X6CrNi23-13 1.4950 75 8.2
plate and strip EN 10028-7 X6CrNi25-20 1.4951 75 8.2
plate and strip EN 10028-7 X6CrNiTi18-10 1.4541 75 8.1
plate and strip EN 10028-7 X6CrNiTiB18-10 1.4941 75 8.1
plate and strip EN 10028-7 X2CrNiMo17-12-2 1.4404 75 8.1
plate and strip EN 10028-7 X2CrNiMoN17-12-2 1.4406 75 8.1
plate and strip EN 10028-7 X5CrNiMo17-12-2 1.4401 75 8.1
plate and strip EN 10028-7 X6CrNiMoTi17-12-2 1.4571 75 8.1
plate and strip EN 10028-7 X2CrNiMo17-12-3 1.4432 75 8.1
plate and strip EN 10028-7 X2CrNiMo18-14-3 1.4435 75 8.1
EN 13445-2:2021+A1:2023/prA2:2025 (E)
Material
Max.
European Material group to
b
Product form Grade thickness Notes
standard number CEN ISO/TR
mm
15608:2017
plate and strip EN 10028-7 X2CrNiMoN17-13-5 1.4439 75 8.1
plate and strip EN 10028-7 X1NiCrMoCu25-20-5 1.4539 75 8.2
plate and strip EN 10028-7 X5NiCrAlTi31-20 1.4958 75 8.2
plate and strip EN 10028-7 X8NiCrAlTi32-21 1.4959 75 8.2
plate and strip EN 10028-7 X3CrNiMoBN17-13-3 1.4910 75 8.2
plate and strip EN 10028-7 X1CrNi25-21 1.4335 75 8.2
plate and strip EN 10028-7 X6CrNiNb18-10 1.4550 75 8.1
plate and strip EN 10028-7 X8CrNiNb16-13 1.4961 75 8.1
plate and strip EN 10028-7 X1CrNiMoN25-22-2 1.4466 75 8.2
plate and strip EN 10028-7 X6CrNiMoNb17-12-2 1.4580 75 8.1
plate and strip EN 10028-7 X2CrNiMoN17-13-3 1.4429 75 8.1
plate and strip EN 10028-7 X3CrNiMoN17-13-3 1.4436 75 8.1
plate and strip EN 10028-7 X2CrNiMoN18-12-4 1.4434 75 8.1
plate and strip EN 10028-7 X2CrNiMo18-15-4 1.4438 75 8.1
plate and strip EN 10028-7 X1NiCrMoCu31-27-4 1.4563 75 8.2
plate and strip EN 10028-7 X1CrNiMoCuN25-25-5 1.4537 75 8.2
plate and strip EN 10028-7 X1CrNiMoCuN20-18-7 1.4547 75 8.2
plate and strip EN 10028-7 X1NiCrMoCuN25-20-7 1.4529 75 8.2
plate and strip EN 10028-7 X2CrNiN23-4 1.4362 50 10.1
plate and strip EN 10028-7 X2CrNiMoN22-5-3 1.4462 75 10.1
...