prEN 10088-1

• Abstract:

  This document lists the chemical composition of stainless steels, which are subdivided in accordance with their main properties into corrosion resistant steels, heat resistant steels and creep resistant steels (see Annex C) and specified in the European Standards given in Table 1.; Table 1 — Overview of material standards for stainless steels; (...); Reference data on some physical properties are given in Annex E, Tables E.1 to E.8.; Empirical formulae for steel grade microstructure classification and pitting resistance ranking are given in Annex D.; NOTE 1 A matrix that shows which steels are included in which standard is given in Annex B.; NOTE 2 General purposes include the use of stainless steels in contact with foodstuffs.; NOTE 3 Valve steels are specified in EN 10090.; NOTE 4 Steel castings are specified in various European Standards (see Bibliography).; NOTE 5 Tool steels are specified in EN ISO 4957.; NOTE 6 Welding consumables are specified in various European Standards (see Bibliography).

• Status: Not Published
• Publication Date: 04-Apr-2028
• ICS: 77.140.20 - Stainless steels
• Technical Committee: SC 13 - Stainless steels
• Drafting Committee: WG 1 - Stainless steels for general purposes
• Current Stage: 4010 - Start of draft translation - Enquiry
• Start Date: 24-Aug-2026
• Completion Date: 20-Aug-2026
• Ref Project: oSIST prEN 10088-1:2026 - Stainless steels - Part 1: List of stainless steels

• Revises: EN 10088-1:2023 - Stainless steels - Part 1: List of stainless steels
• Effective Date: 01-Apr-2026

prEN 10088-1 is a draft European Standard from CEN that lists the chemical composition of stainless steels and sorts them into corrosion resistant steels, heat resistant steels and creep resistant steels. It is meant for engineers, purchasers and quality staff who need to identify a stainless steel grade, compare designations, or check which family and related standard a grade belongs to.

What does prEN 10088-1 specify?

prEN 10088-1 specifies the stainless steel grades covered by the EN 10088 system and gives their chemical composition limits. It also shows how the grades are organized by use and by microstructure, so readers can move from a material name to the right table and the right companion standard.

Clause 1 says the document is a list of stainless steels specified in the European Standards shown in Table 1. It points readers to Annex C for classification, Annex D for empirical ranking formulae, Annex E for physical property guidance, and Annex B for a matrix showing where grades appear in the EN system.

Annex	What it covers
Annex A	Designations of ISO stainless steels and comparable grades in other systems
Annex B	Matrix showing which steels are included in which European Standard
Annex C	Classification of stainless steel grades
Annex D	Empirical formulae for microstructure classification and pitting resistance ranking
Annex E	Guidance data on some physical properties
Annex F	Chemical composition of nickel and cobalt alloys listed in EN 10095, EN 10269 and EN 10302

What are the key requirements of prEN 10088-1?

How are stainless steels grouped?

Clause 1 and Annex C organize stainless steels by their main property into corrosion resistant, heat resistant and creep resistant steels, and then by microstructure into austenitic, austenitic-ferritic (Duplex), ferritic, martensitic and precipitation hardening grades. In practice, this is the first check a specifier makes before choosing a table, because the family determines the chemistry limits and the likely service behavior.

Annex C also explains grouping by significant alloying elements such as chromium, nickel, molybdenum, manganese, nitrogen and sulfur. That matters because the EN steel number and the order of the grades reflect the alloying pattern, which helps with substitution checks and cross-referencing.

What do the composition tables control?

Clause 4 gives the chemical composition of each family in Tables 2 to 9, using cast analysis limits. The tables separate austenitic corrosion resistant steels, austenitic-ferritic corrosion resistant steels, ferritic corrosion resistant steels, martensitic and precipitation hardening corrosion resistant steels, heat resistant steels and creep resistant steels.

For a user, these tables are the core purchasing and qualification data. They tell you what chemistry a heat or cast must meet, which elements are controlled, and which grade name and steel number correspond to that composition.

What special composition rules apply?

Clause 4 states that elements not quoted or not listed shall not be intentionally added without purchaser agreement, except for finishing the cast. That is important in practice because trace additions from scrap or process materials can change properties or suitability, so mills and buyers need to control unintended additions.

Clause 4 also gives sulfur rules for bars, rods, wire, sections, bright products and the relevant semi-finished products. It says controlled sulfur ranges may be agreed for machinability, weldability or polishability, which helps users balance easy machining against toughness and corrosion resistance.

What grade-specific adjustments are allowed?

Clause 4 includes grade-specific allowances for some compositions, such as copper limits for austenitic grades intended for cold heading and cold extruding. It also notes situations where nickel content may be increased for special reasons, such as hot workability or low magnetic permeability.

These notes matter because they show that some grades have agreed flexibility for processing or performance. A buyer should use them when writing an order, especially if forming, welding, surface finish or magnetic behavior matters.

How does the standard help with designation and comparison?

Annex A explains the European steel designation system from EN 10027, using a steel name and a steel number. It also shows how grades are compared with other systems such as ISO, UNS, JIS and GB, while warning that identical or close designations do not automatically mean identical chemistry.

This helps when substituting materials across markets. A specifier can compare a European grade with an ISO or national equivalent, but still has to verify each element before approving a replacement.

What do the empirical formulae add?

Annex D gives empirical formulae for microstructure classification and for pitting resistance ranking, including the Pitting Resistance Equivalent (PRE). These formulae are used for characterization, comparison and process control, not as a substitute for the chemistry tables.

In practice, Annex D helps engineers estimate how a composition may behave in terms of ferrite, martensite, austenite or duplex tendencies, and how grades compare for pitting resistance. It is useful when selecting a grade for corrosive service or when checking whether small composition changes may affect structure.

What terms does prEN 10088-1 define?

• stainless steel - steel with at least 10,5 % chromium and a maximum 1,20 % carbon, defined in Clause 3.
• corrosion resistant steel - a stainless steel intended for resistance to uniform or local attack from the environment, explained in Annex C.
• heat resistant steel - a stainless steel with resistance to oxidation and hot gases at temperatures higher than 550 °C, explained in Annex C.
• creep resistant steel - a stainless steel designed to resist deformation under long-term stress at temperatures above 500 °C, explained in Annex C.
• austenitic-ferritic (Duplex) - a two-phase stainless steel family with a balanced ferrite and austenite structure, described in Annex C.
• PRE - Pitting Resistance Equivalent, an empirical ranking used in Annex D to compare pitting resistance.

Who uses prEN 10088-1?

prEN 10088-1 is used by steelmakers, stockholders, purchasers, designers and quality managers who need to specify or verify a stainless steel grade. It is also used by people comparing European grades with ISO, UNS, JIS or GB designations in procurement or material approval work.

In practice, it supports buying and technical review for products covered by the EN 10088 series and related standards for pressure equipment, tubes, forgings, fasteners, springs, weld consumables and stainless steel structures. It is also relevant where stainless steels are used in contact with foodstuffs, and where welders or fabrication teams need to understand the grade family before processing.

What changed in prEN 10088-1 from the previous edition?

prEN 10088-1 supersedes EN 10088-1:2023. The foreword states one significant technical change: the composition of ferritic grade 1.4106 in Part 3 has been changed.

Which standards are used with prEN 10088-1?

• EN 10079 - provides the steel product definitions used in Clause 2 and Clause 3.
• EN 10027-1 and EN 10027-2 - define the steel name and steel number system used in Annex A.
• EN 10088-2 to EN 10088-5 - the companion parts of the EN 10088 series for technical delivery conditions.
• EN 10028-7, EN 10216-5, EN 10222-5, EN 10264-4, EN 10269, EN 10302 - application standards that use stainless steels listed in this document.
• EN 10090 and EN ISO 4957 - cover valve steels and tool steels, which are referenced in the scope notes.
• EN ISO/TR 15608 - supports the grouping language used in Annex C.
• ISO 6306 - sets the order of elements in the composition tables.
• ISO 15510 and ASTM A959 - support the comparison of grades across designation systems in Annex A.
• EN ISO 6931-1, EN ISO 14343 and EN ISO 17633 - cover stainless steel spring wire and welding consumables named in the bibliography.

What does the prEN 10088-1 document contain?

The main body is Clause 4, which presents the chemical composition tables for the different stainless steel families. Those tables are the practical core of the document for specification, purchase, and incoming inspection.

Annex A gives designation mappings and comparable grades across European, ISO and other systems. Annex B is a matrix of which steels appear in which European Standard, and Annex C explains the classification logic by use, microstructure and alloying elements.

Annex D provides empirical formulae for classification and pitting resistance ranking, while Annex E gives guidance data on physical properties such as thermal expansion, density, modulus and magnetizability. Annex F adds nickel and cobalt alloy compositions from related standards, which is useful when comparing stainless steels with high-alloy alternatives.

SLOVENSKI STANDARD
01-oktober-2026
Nerjavna jekla - 1. del: Seznam nerjavnih jekel
Stainless steels - Part 1: List of stainless steels
Nichtrostende Stähle - Teil 1: Verzeichnis der nichtrostenden Stähle
Aciers inoxydables - Partie 1 : Liste des aciers inoxydables
Ta slovenski standard je istoveten z: prEN 10088-1
ICS:
77.140.20 Visokokakovostna jekla Stainless steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2026
ICS 77.140.20 Will supersede EN 10088-1:2023
English Version
Stainless steels - Part 1: List of stainless steels
Aciers inoxydables - Partie 1 : Liste des aciers Nichtrostende Stähle - Teil 1: Verzeichnis der
inoxydables nichtrostenden Stähle
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 13.
If this draft becomes a European Standard, 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.

This draft European Standard 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10088-1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Chemical composition . 6
Annex A (informative) Designation of ISO stainless steels and of comparable grades covered in
various designation systems listed according to the European Standards system .24
Annex B (informative) Matrix to show which steels are included in which European Standard .38
Annex C (informative) Classification of stainless steel grades .50
Annex D (informative) Empirical formulae for steel grade microstructure classification and
pitting resistance ranking .54
Annex E (informative) Guidance data on some physical properties .56
Annex F (informative) Chemical composition of nickel and cobalt alloys listed in EN 10095,
EN 10269 and EN 10302 .71
Bibliography .74

European foreword
This document (prEN 10088-1:2026) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization ”, the secretariat of which is held by AFNOR.
This document will supersede EN 10088-1:2023.
EN 10088-1:2023:
— change in composition of ferritic grade 1.4106 (part 3)
The EN 10088 series, under the general title Stainless steels, consists of the following parts:
— Part 1: List of stainless steels;
— Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resistant steels for general
purposes;
— Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright
products of corrosion steels for general purposes;
— Part 4: Technical delivery conditions for sheet/plate and strip of corrosion steels for construction
purposes;
— Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion steels
for construction purposes.
Through its sub-committee SC 13 “Stainless steels”, (secretariat: SIS).
Introduction
The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that
compliance with this document may involve the use of patents concerning ten steel grades, given in
Clause 4, Annex A, Annex B and Annex E and which is claimed to be relevant for the following clause(s)
of this document:
— Clause 4;
— Annex A;
— Annex B;
— Annex E.
CEN takes no position concerning the evidence, validity and scope of these patent rights. The holders of
these patents right have assured CEN that they are willing to negotiate licences, under reasonable and
non-discriminatory terms and conditions, with applicants throughout the world. In this respect, the
statements of the holders of these patent rights are registered with CEN.
Information may be obtained from:
Grade 1.4662, 1.4637
Outokumpu Stainless AB
SE-77480 Avesta, Sweden
Grade 1.4420, 1.4622
Outokumpu Oyj
FI-00180, Helsinki, Salmisaarenranta 11, Finland
Grade 1.4062, 1.4669, 1.4670
Ugitech
F-73403 Ugine Cedex, France
Grade 1.4062, 1.4669
Industeel
F-71200 Creusot, 56 Rue Clemenceau, France
Grade 1.4646, 1.4611, 1.4613
Acciai Speciali Terni
I-05100 Terni, Italy
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. CEN shall not be held responsible for identifying any or
all such patent rights.
1 Scope
This document lists the chemical composition of stainless steels, which are subdivided in accordance with
their main properties into corrosion resistant steels, heat resistant steels and creep resistant steels (see
Annex C) and specified in the European Standards given in Table 1.
Table 1 — Overview of material standards for stainless steels
Stainless steels
Corrosion resistant Creep resistant
Heat resistant steels
steels steels
EN 10028-7  EN 10028-7
EN 10088-2
EN 10088-3
EN 10088-4
EN 10088-5
EN 10095
EN 10151
EN 10216-5  EN 10216-5
EN 10217-7
EN 10222-5  EN 10222-5
EN 10250-4
EN 10263-5
EN 10264-4 EN 10264-4
EN 10269  EN 10269
EN ISO 6931-1
EN 10272
EN 10296-2
EN 10297-2
EN 10302
EN 10312
EN 10357
EN 10378
Reference data on some physical properties are given in Annex E, Tables E.1 to E.8.
Empirical formulae for steel grade microstructure classification and pitting resistance ranking are given
in Annex D.
NOTE 1 A matrix that shows which steels are included in which standard is given in Annex B.
NOTE 2 General purposes include the use of stainless steels in contact with foodstuffs.
NOTE 3 Valve steels are specified in EN 10090.
NOTE 4 Steel castings are specified in various European Standards (see Bibliography).
NOTE 5 Tool steels are specified in EN ISO 4957.
NOTE 6 Welding consumables are specified in various European Standards (see Bibliography).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 10079, Definition of steel products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10079 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
stainless steel
steel with at least 10,5 % of chromium and maximum 1,20 % of carbon
Note 1 to entry: Stainless steels are further subdivided in accordance with their main property into corrosion
resistant steels, heat-resistant steels and creep resistant steels.
Note 2 to entry: One type of steel in Table 7 and five types of steel in Table 9 contain less chromium than the
minimum defined for stainless steels, but are included in the heat-resistant and creep-resistant steels standards
respectively, because they form a part of these two families of steels.
[SOURCE: EN 10020:2000, 3.2.2]
4 Chemical composition
The chemical composition of stainless steels is given:
— in Table 2 for austenitic corrosion resistant steels;
— in Table 3 for austenitic-ferritic corrosion resistant steels;
— in Table 4 for ferritic corrosion resistant steels;
— in Table 5 for martensitic and precipitation hardening corrosion resistant steels;
— in Table 6 for austenitic and austenitic-ferritic heat resistant steels;
— in Table 7 for ferritic heat resistant steels;
— in Table 8 for austenitic creep resistant steels;
— in Table 9 for martensitic creep resistant steels.
NOTE 1 The chemical composition of nickel and cobalt alloys listed in EN 10095, EN 10269 and EN 10302 is
given in Annex F, Tables F.1 and F.2.
NOTE 2 Steels in this document and in EN 10088-2 and EN 10088-3 are listed according to a line number (see
Annex A).
NOTE 3 The order of the elements listed in the tables of chemical composition is according to ISO 6306.
Table 2 — Chemical composition (cast analysis) of austenitic corrosion resistant steels
a
Steel designation
% by mass
c
Name Number C Si Mn P S Cr Mo Ni N Others
Cu
Austenitic steels without minimum Mo content
X2CrNiN18–7 1.4318 0,030 1,00 2,00 0,045 0,015 16,5 to 18,5 - 6,0 to 8,0 0,10 to 0,20 - -
0,50 to
X4CrNiCu18–7 1.4382 0,05 1,00 2,00 0,045 0,015 17,0 to 19,0 - 6,0 to 8,0 0,05 to 0,15 -
2,00
0,030 to
X10CrNi18–8 1.4310 2,00 2,00 0,045 0,015 16,0 to 19,0 0,80 6,0 to 9,5 0,10 - -
0,15
b
X2CrNi18–9 1.4307 0,030 1,00 2,00 0,045 17,5 to 19,5 - 8,0 to 10,5 0,10 - -
0,015
0,030 to
X9CrNi18–9 1.4325 1,00 2,00 0,045 0,030 17,0 to 19,0 - 8,0 to 10,0 - - -
0,15
e e
0,10 1,00 2,00 0,045 0,15 to 0,35 17,0 to 19,0 - 8,0 to 10,0 0,10 1,00 -
X8CrNiS18–9 1.4305
1,40 to
e e
0,08 1,00 2,00 0,045 0,15 to 0,35 17,0 to 19,0 0,60 8,0 to 10,0 0,10 -
X6CrNiCuS18–9-2 1.4570
h
1,80
b
X3CrNiCu18–9-4 1.4567 0,04 1,00 2,00 0,045 17,0 to 19,0 - 8,5 to 10,5 0,10 3,00 to 4,0 -
0,015
X5CrNiN19–9 1.4315 0,06 1,00 2,00 0,045 0,015 18,0 to 20,0 - 8,0 to 11,0 0,12 to 0,22 - -
1,50 to 1,50 to
X3CrNiCu19–9-2 1.4560 0,035 1,00 0,045 0,015 18,0 to 19,0 - 8,0 to 9,0 0,10 -
2,00 2,00
0,030 to 0,030 to 1,30 to
X5CrNiCu19–6-2 1.4640 0,50 1,50 to 4,0 0,045 0,015 18,0 to 19,0 - 5,5 to 6,9 -
0,08 0,11 2,00
b
X2CrNiN18–10 1.4311 0,030 1,00 2,00 0,045 17,5 to 19,5 - 8,5 to 11,5 0,12 to 0,22 - -
0,015
b
X5CrNi18–10 1.4301 0,07 1,00 2,00 0,045 17,5 to 19,5 - 8,0 to 10,5 0,10 - -
0,015
X2CrNiSi18–10 1.4682 0,03 0,80 to 2,0 2,00 0,045 0,015 17,5 to 19,5 0,40 to 0,80 9,0 to 11,0 0,10 - -
b d
X6CrNiTi18–10 1.4541 0,08 1,00 2,00 0,045 17,0 to 19,0 - - - Ti: 5 × C to 0,70
0,015 9,0 to 12,0
d
X6CrNiNb18–10 1.4550 0,08 1,00 2,00 0,045 0,015 17,0 to 19,0 - - - Nb: 10 × C to 1,00
9,0 to 12,0
X2CrNiCu19–10 1.4650 0,030 1,00 2,00 0,045 0,015 18,5 to 20,0 - 9,0 to 10,0 0,08 1,00 -
10,0 to 12,0
b
X2CrNi19–11 1.4306 0,030 1,00 2,00 0,045 18,0 to 20,0 - 0,10 - -
0,015
d
a
Steel designation
% by mass
c
Name Number C Si Mn P S Cr Mo Ni N Others
Cu
b
X4CrNi18–12 1.4303 0,06 1,00 2,00 0,045 17,0 to 19,0 - 11,0 to 13,0 0,10 - -
0,015
X1CrNiSi18–15–4 1.4361 0,015 3,7 to 4,5 2,00 0,025 0,010 16,5 to 18,5 0,20 14,0 to 16,0 0,10 - -
X8CrMnCuN17–8-3 1.4597 0,10 2,00 6,5 to 9,0 0,040 0,030 15,0 to 18,0 1,00 3,00 0,10 to 0,30 2,00 to 3,5 -
X8CrMnNi19–6-3 1.4376 0,10 1,00 5,0 to 8,0 0,045 0,015 17,0 to 20,5  2,00 to 4,5 0,30 - -
X3CrMnNiCu15–8-5–3 1.4615 0,030 1,00 7,0 to 9,0 0,040 0,010 14,0 to 16,0 0,80 4,5 to 6,0 0,02 to 0,06 2,0 to 4,0 -
f
X12CrMnNiN17–7-5 1.4372 1,00 5,5 to 7,5 0,045 0,015 16,0 to 18,0 - 3,5 to 5,5 0,05 to 0,25 - -
0,15
X2CrMnNiN17–7-5 1.4371 0,030 1,00 6,0 to 8,0 0,045 0,015 16,0 to 17,5 - 3,5 to 5,5 0,15 to 0,25 1,00 -
1,00 to
X9CrMnNiCu17–8-5–2 1.4618 0,10 1,00 5,5 to 9,5 0,070 0,010 16,5 to 18,5 - 4,5 to 5,5 0,15 -
2,50
0,20 to 14,0 to
X30MnCrN16–14 1.4678 1,00 0,045 0,015 12,0 to 16,0 - - 0,20 to 0,40 2,00 -
0,40 18,0
X12CrMnNiN18–9-5 1.4373 0,15 1,00 7,5 to 10,5 0,045 0,015 17,0 to 19,0 - 4,0 to 6,0 0,05 to 0,25 - -
0,05 to
X8CrMnNiN18–9-5 1.4374 0,30 to 0,60 9,0 to 10,0 0,035 0,030 17,5 to 18,5 0,50 5,0 to 6,0 0,25 to 0,32 0,40 -
0,10
0,07 to
X11CrNiMnN19–8-6 1.4369 0,50 to 1,00 5,0 to 7,5 0,030 0,015 17,5 to 19,5 - 6,5 to 8,5 0,20 to 0,30 - -
0,15
11,0 to
X13CrMnNiN18–13–2 1.4020 0,15 1,00 0,045 0,030 16,5 to 19,0 - 0,5 to 2,5 0,20 to 0,45 - -
14,0
11,5 to
X6CrMnNiN18–13–3 1.4378 0,08 1,00 0,060 0,030 17,0 to 19,0 - 2,3 to 3,7 0,20 to 0,40 - -
14,5
X6CrMnNiCuN18–12–4-2 0,02 to 10,5 to 1,50 to
1.4646 * 1,00 0,050 0,015 17,0 to 19,0 0,50 3,5 to 4,5 0,20 to 0,30 -
* 0,10 12,5 3,00
X3CrMnNiN20–9-6 1.4391 0,040 1,00 8,0–10,0 0,045 0,030 19,0 to 21,5 0,75 5,5 to 7,5 0,15 to 0,40 - -
X1CrNi25–21 1.4335 0,020 0,25 2,00 0,025 0,010 24,0 to 26,0 0,20 20,0 to 22,0 0,10 - -
Austenitic steels with Mo
1,30 to
e e
0,030 1,00 2,00 0,045 0,10 to 0,20 16,5 to 18,5 2,00 to 2,50 10,0 to 13,0 0,10 -
X2CrNiMoCuS17–10–2 1.4598
1,80
X3CrNiCuMo17–11–3-2 1.4578 0,04 1,00 2,00 0,045 0,015 16,5 to 17,5 2,00 to 2,50 10,0 to 11,0 0,10 3,0 to 3,5 -
a
Steel designation
% by mass
c
Name Number C Si Mn P S Cr Mo Ni N Others
Cu
10,0 to 12,5
b
X2CrNiMoN17–11–2 1.4406 0,030 1,00 2,00 0,045 16,5 to 18,5 2,00 to 2,50 0,12 to 0,22 - -
0,015
d
10,0 to 13,0
b
X2CrNiMo17–12–2 1.4404 0,030 1,00 2,00 0,045 16,5 to 18,5 2,00 to 3,0 0,10 - -
0,015
d
b
X5CrNiMo17–12–2 1.4401 0,07 1,00 2,00 0,045 16,5 to 18,5 2,00 to 2,50 10,0 to 13,0 0,10 - -
0,015
10,5 to 13,5
b
X6CrNiMoTi17–12–2 1.4571 0,08 1,00 2,00 0,045 16,5 to 18,5 2,00 to 2,50 - - Ti: 5 × C to 0,70
0,015
d
X6CrNiMoNb17–12–2 1.4580 0,08 1,00 2,00 0,045 0,015 16,5 to 18,5 2,00 to 2,50 10,5 to 13,5 - - Nb: 10 × C to 1,00
1.4420
0,045
e
0,030 1,00 2,00 0,015 19,5 to 21,5 0,50 to 1,50 8,0 to 9,5 0,14 to 0,25 1,00 -
X2CrNiMoN21–9-1 *
e
g
*
b
X2CrNiMo17–12–3 1.4432 0,030 1,00 2,00 0,045 16,5 to 18,5 2,50 to 3,00 10,5 to 13,0 0,10 - -
0,015
10,5 to 13,0
b
X3CrNiMo17–12–3 1.4436 0,05 1,00 2,00 0,045 16,5 to 18,5 2,50 to 3,00 0,10 - -
0,015
d
X3CrNiMo18–12–3 1.4449 0,035 1,00 2,00 0,045 0,015 17,0 to 18,2 2,25 to 2,75 11,5 to 12,5 0,08 1,00 -
11,0 to 14,0
X2CrNiMoN17–13–3 1.4429 0,030 1,00 2,00 0,045 0,015 16,5 to 18,5 2,50 to 3,00 0,12 to 0,22 - -
d
10,5 to 14,0
X2CrNiMoN18–12–4 1.4434 0,030 1,00 2,00 0,045 0,015 16,5 to 19,5 3,00 to 4,0 0,10 to 0,20 - -
d
b
X2CrNiMo18–14–3 1.4435 0,030 1,00 2,00 0,045 17,0 to 19,0 2,50 to 3,00 12,5 to 15,0 0,10 - -
0,015
X2CrNiMoN17–13–5 1.4439 0,030 1,00 2,00 0,045 0,015 16,5 to 18,5 4,0 to 5,0 12,5 to 14,5 0,12 to 0,22 - -
13,0 to 16,0
b
X2CrNiMo18–15–4 1.4438 0,030 1,00 2,00 0,045 17,5 to 19,5 3,00 to 4,0 0,10 - -
0,015
d
X5CrNiMnMoNNbV22– Nb: 0,10 to
1.4681 0,060 1,00 4,0 to 6,0 0,045 0,030 20,5 to 23,5 1,5 to 3,0 11,5 to 13,5 0,20 to 0,40 -
12–5-2 0,30 V: 0,10 to 0,30
0,50 to
X1CrNiMoCuN20–18–7 1.4547 0,020 0,70 1,00 0,030 0,010 19,5 to 20,5 6,0 to 7,0 17,5 to 18,5 0,18 to 0,25 -
1,00
X1CrNiMoN25–22–2 1.4466 0,020 0,70 2,00 0,025 0,010 24,0 to 26,0 2,00 to 2,50 21,0 to 23,0 0,10 to 0,16 - -
1,00 to
X1CrNiMoCuNW24–22–6 1.4659 0,020 0,70 2,00 to 4,0 0,030 0,010 23,0 to 25,0 5,5 to 6,5 21,0 to 23,0 0,35 to 0,50 W: 1,50 to 2,50
2,00
a
Steel designation
% by mass
c
Name Number C Si Mn P S Cr Mo Ni N Others
Cu
0,30 to
X1CrNiMoCuN24–22–8 1.4652 0,020 0,50 2,00 to 4,0 0,030 0,005 23,0 to 25,0 7,0 to 8,0 21,0 to 23,0 0,45 to 0,55 -
0,60
X2CrNiMnMoN25–18–6-5 1.4565 0,030 1,00 5,0 to 7,0 0,030 0,015 24,0 to 26,0 4,0 to 5,0 16,0 to 19,0 0,30 to 0,60 - Nb: 0,15
Austenitic steels with Ni as main alloying element
1,20 to
X1NiCrMoCu25–20–5 1.4539 0,020 0,70 2,00 0,030 0,010 19,0 to 21,0 4,0 to 5,0 24,0 to 26,0 0,15 -
2,00
0,50 to
X1NiCrMoCuN25–20–7 1.4529 0,020 0,75 2,00 0,030 0,010 19,0 to 21,0 6,0 to 7,0 24,0 to 26,0 0,15 to 0,25 -
1,50
Al: 0,15 to 0,45
X2NiCrAlTi32–20 1.4558 0,030 0,70 1,00 0,020 0,015 20,0 to 23,0 - 32,0 to 35,0 - -
Ti: [8 × (C + N)] to
0,60
0,70 to
X1NiCrMoCu31–27–4 1.4563 0,020 0,70 2,00 0,030 0,010 26,0 to 28,0 3,00 to 4,0 30,0 to 32,0 0,10 -
1,50
Elements not quoted (“-”) or not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions
shall be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
a
Maximum values unless indicated otherwise.
b
For bars, rods, wire, sections, bright products and the relevant semi-finished products, a maximum content of 0,030 % S applies. Particular ranges of sulfur content may provide improvement
of particular properties. For machinability a controlled sulfur content of 0,015 % to 0,030 % is recommended and permitted. For weldability, a controlled sulfur content of 0,0080 % to 0,030 %
is recommended and permitted. For polishability, a controlled sulfur content of 0,015 % max. is recommended.
c
For austenitic steel grades intended for cold heading and cold extruding, a Cu-content of max. 1,00 % is permitted.
d
Where for special reasons, e.g. hot workability for the fabrication of seamless tubes where it is necessary to minimize the delta ferrite content, or with the aim of low magnetic permeability,
the maximum Ni content may be increased by the following amounts:
- mass fraction of 0,50 %: 1.4571;
- mass fraction of 1,00 %: 1.4306, 1.4406, 1.4429, 1.4434, 1.4436, 1.4438, 1.4541, 1.4550;
- mass fraction of 1,50 %: 1.4404.
e
Parts made of high sulfur free cutting austenitic steels might not comply with European Directive 94/27 regarding articles in contact with human skin.
f
For pressure purposes a carbon limit of C ≤ 0,07 % is allowed.
g
For application according to Pressure Equipment Directive (PED) 2014/68/EU the phosphorus content is restricted to max 0,035 %.
h
For cold heading and cold extruding, a Cu-content of max. 3,5 % can be agreed upon at the time of enquiry and order
* Patented steel grade.
Table 3 — Chemical composition (cast analysis) of austenitic-ferritic corrosion resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Cu Others
Austenitic-ferritic steels without minimum Mo content
X2CrNiN22–2 * 1.4062 * 0,030 1,00 2,00 0,040 0,010 21,5 to 24,0 0,45 1,00 to 2,90 0,16 to 0,28 - -
X2CrCuNiN23–2-2 * 1.4669 * 0,045 1,00 1,00 to 3,00 0,040 0,030 21,5 to 24,0 0,50 1,00 to 3,00 0,12 to 0,20 1,60 to 3,00 -
X2CrMnNiSiN20–5-4–2 * 1.4670 * 0,030 1,50 to 3,00 4,0 to 6,0 0,040 0,010 18,0 to 21,0 0,60 3,00 to 5,5 0,10 to 0,20 1,00 -
Austenitic-ferritic steels with Mo
X2CrNiMoSi18–5-3 1.4424 0,030 1,40 to 2,00 1,20 to 2,00 0,035 0,015 18,0 to 19,0 2,50 to 3,00 4,5 to 5,2 0,05 to 0,10 - -
0,015 to
X2CrNiMnMoCuN21–3-1–1 * 1.4637 * 0,30 to 0,50 1,05 to 1,30 0,035 0,05 19,9 to 20,3 1,15 to 1,30 2,65 to 3,00 0,18 to 0,21 0,30 to 0,50 -
0,030
X2CrNiN23–4 1.4362 0,030 1,00 2,00 0,035 0,015 22,0 to 24,5 0,10 to 0,60 3,5 to 5,5 0,05 to 0,20 0,10 to 0,60 -
X2CrMnNiN21–5-1 1.4162 0,04 1,00 4,0 to 6,0 0,040 0,015 21,0 to 22,0 0,10 to 0,80 1,35 to 1,90 0,20 to 0,25 0,10 to 0,80 -
X2CrMnNiMoN21–5-3 1.4482 0,030 1,00 4,0 to 6,0 0,035 0,030 19,5 to 21,5 0,10 to 0,60 1,50 to 3,50 0,05 to 0,20 1,00 -
c c
0,030 1,00 2,00 0,035 0,015 21,0 to 23,0 2,50 to 3,5 4,5 to 6,5 0,10 to 0,22 - -
X2CrNiMoN22–5-3 1.4462
X2CrNiMnMoCuN24–4-3–2 * 1.4662 * 0,030 0,70 2,50 to 4,0 0,035 0,005 23,0 to 25,0 1,00 to 2,00 3,00 to 4,5 0,20 to 0,30 0,10 to 0,80 -
X2CrNiMoCuN25–6-3 1.4507 0,030 0,70 2,00 0,035 0,015 24,0 to 26,0 3,00 to 4,0 6,0 to 8,0 0,20 to 0,30 1,00 to 2,50 -
b
X3CrNiMoN27–5-2 1.4460 0,05 1,00 2,00 0,035 25,0 to 28,0 1,30 to 2,00 4,5 to 6,5 0,05 to 0,20 - -
0,015
X2CrNiMoN25–7-4 1.4410 0,030 1,00 2,00 0,035 0,015 24,0 to 26,0 3,00 to 4,5 6,0 to 8,0 0,24 to 0,35 - -
W: 0,50 to
X2CrNiMoCuWN25–7-4 1.4501 0,030 1,00 1,00 0,035 0,015 24,0 to 26,0 3,00 to 4,0 6,0 to 8,0 0,20 to 0,30 0,50 to 1,00
1,00
X2CrNiMoN29–7-2 1.4477 0,030 0,50 0,80 to 1,50 0,030 0,015 28,0 to 30,0 1,50 to 2,60 5,8 to 7,5 0,30 to 0,40 0,80 -
Co: 0,50 to
X2CrNiMoCoN28–8-5–1 1.4658 0,030 0,50 1,50 0,035 0,010 26,0 to 29,0 4,0 to 5,0 5,5 to 9,5 0,30 to 0,50 1,00
2,00
Elements not quoted (“-”) or not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions
shall be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
a
Maximum values unless indicated otherwise.
b
For bars, rods, wire, sections, bright products and the relevant semi-finished products, a maximum content of 0,030 % S applies. Particular ranges of sulfur content may provide improvement
of particular properties. For machinability a controlled sulfur content of 0,015 % to 0,030 % is recommended and permitted. For weldability, a controlled sulfur content of 0,008 % to 0,030 %
is recommended and permitted. For polishability, a controlled sulfur content of 0,015 % max. is recommended.
c
Minimum value of the Pitting Resistance Equivalent (PRE = Cr + 3,3 Mo + 16 N) can be agreed upon at the time of enquiry and order.
* Patented steel grade.
Table 4 — Chemical composition (cast analysis) of ferritic corrosion resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Nb Ti Others
Ferritic steels
0,15 to 11,0 to
X3CrS12 1.4045 0,060 2,00 1,50 0,040 1,00
0,35 13,0
10,5 to 0,30 to
b
X2CrNi12 1.4003 0,030 1,00 2,00 0,040 - 0,030 - - -
0,015
12,5 1,00
10,5 to
c
X2CrTi12 1.4512 0,030 1,00 1,00 0,040 0,015 - - - - -
[6 × (C + N)] to 0,65
12,5
10,5 to 0,50 to
X6CrNiTi12 1.4516 0,08 0,70 1,50 0,040 0,015 - - - 0,05 to 0,35 -
12,5 1,50
12,0 to
b
X6Cr13 1.4000 0,08 1,00 1,00 0,040 - - - - - -
0,015
14,0
12,0 to
b
X6CrAl13 1.4002 0,08 1,00 1,00 0,040 - - - - - Al: 0,10 to 0,30
0,015
14,0
X2CrMnNiTi1 1,00 to 11,0 to 0,30 to
1.4600 0,030 1,00 0,040 0,015 - 0,025 - 6 × C to 0,35 -
2 2,50 13,0 1,00
0,20
[4 × (C + N) + 0,15] to
13,0 to Al: 1,50
X2CrSiTi15 1.4630 0,030 to 1,00 0,050 0,050 0,50 0,50 - 0,50
c
16,0 Cu: 0,50
0,80
1,50
14,0 to
X1CrNb15 1.4595 0,020 1,00 1,00 0,025 0,015 - - 0,020 0,20 to 0,60 - -
16,0
16,0 to
b
X6Cr17 1.4016 0,08 1,00 1,00 0,040 -  - - - -
0,015
18,0
[4 × (C + N) + 0,15] to
16,0 to
X2CrTi17 1.4520 0,025 0,50 0,50 0,040 0,015 - - 0,015 - -
c
18,0
0,80
[4 × (C + N) + 0,15] to
16,0 to
b
X3CrTi17 1.4510 0,05 1,00 1,00 0,040 - - - - -
0,015
c
18,0
0,80
16,0 to
b
X3CrNb17 1.4511 0,05 1,00 1,00 0,040 - - - 12 × C to 1,00 - -
0,015
18,0
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Nb Ti Others
16,0 to Zr ≥ 7 × (C + N)
X2CrNbZr17 1.4590 0,030 1,00 1,00 0,040 0,015 -  - 0,35 to 0,55 -
17,5 + 0,15
16,0 to 1,20 to
X6CrNi17–1 1.4017 0,08 1,00 1,00 0,040 0,015 - - - - -
18,0 1,60
17,5 to [3 × C + 0,30] to
b
X2CrTiNb18 1.4509 0,030 1,00 1,00 0,040 -  - 0,10 to 0,60 -
0,015
18,5 1,00
0,20
[3 × C + 0,30] to
X2CrAlSiNb1 17,5 to Al: 0,20 to 1,50
1.4634 0,030 to 1,00 0,050 0,050 0,50 0,50 - -
c
8 18,5 Cu: 0,50
1,00
1,50
[4 × (C + N) + 0,15] to
18,5 to
X2CrNbTi20 1.4607 0,030 1,00 1,00 0,040 0,015 -  0,030 1,00 -
c
20,5
0,80
[4 × (C + N) + 0,20] to
19,0 to Cu: 0,50,
X2CrTi21 * 1.4611 * 0,030 1,00 1,00 0,050 0,050 0,50 0,50 - -
c
22,0 Al: 0,05
1,00
20,0 to
X2CrNbCu21 1.4621 0,030 1,00 1,00 0,040 0,015 - - 0,030 0,20 to 1,00 - Cu: 0,10 to 1,00
21,5
V: 0,03 to 0,50
X2CrCuNbTiV 20,0 to
d
1.4622 * 0,030 1,00 0,80 0,040 0,015 - - 0.030 0,10 to 0,70 0,10 to 0,70
d
22–1 * 24,0
Cu: 0,30 to 0,80
[4 × (C + N) + 0,20] to
22,0 to Cu: 0,50,
X2CrTi24 * 1.4613 * 0,030 1,00 1,00 0,050 0,050 0,50 0,50 - -
c
25,0 Al: 0,05
1,00
Ferritic steels with Mo
X5CrNiMoTi1 13,5 to 1,00 to
1.4589 0,08 1,00 1,00 0,040 0,015 0,20 to 1,20 - - 0,30 to 0,50 -
5–2 15,5 2,50
0,15 to 16,0 to
X6CrMoS17 1.4105 0,08 1,50 1,50 0,040 0,20 to 0,60 - - - - -
0,35 18,0
16,0 to
b
X6CrMo17–1 1.4113 0,08 1,00 1,00 0,040 0,90 to 1,40 - - - - -
0,015
18,0
[4 × (C + N) + 0,15] to
X2CrMoTi17– 16,0 to
1.4513 0,025 1,00 1,00 0,040 0,015 0,80 to 1,40 - 0,020 - -
c
1 18,0
0,80
X6CrMoNb17 16,0 to [7 × (C+N)+0,10] to
1.4526 0,08 1,00 1,00 0,040 0,015 0,80 to 1,40 - 0,040 - -
–1 18,0 1,00
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Nb Ti Others
[4 × (C + N) + 0,15] to
X2CrMoTi18– 17,0 to
1.4521 0,025 1,00 1,00 0,040 0,015 1,75 to 2,50 - 0,030 - -
c
2 20,0
0,80
[4 × (C + N) + 0,15] to
X2CrMoTiS18 0,15 to 17,5 to
1.4523 0,030 1,00 0,50 0,040 2,00 to 2,50 - - - (C + N) : 0,040
c
–2 0,35 19,0
0,80
X2CrMoSiS18 0,25 to 17,0 to
1.4106 0,030 2,00 1,00 0,040 1,50 to 2,50 - - - - -
–2-1 0,35 19,0
X6CrMoS19– 0,15 to 17,5 to
1.4114 0,080 1,00 2,50 0,040 1,50 to 2,50 0,75 - - - -
2 0,35 19,5
[4 × (C + N) + 0,15] to
X2CrMoTi29– 28,0 to
1.4592 0,025 1,00 1,00 0,030 0,010 3,50 to 4,50 - 0,045 - -
c
4 30,0
0,80
Elements not quoted (“-”) or not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions
shall be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
a
Maximum values unless indicated otherwise.
b
For bars, rods, wire, sections, bright products and the relevant semi-finished products, a maximum content of 0,030 % S applies. Particular ranges of sulfur content may provide improvement
of particular properties. For machinability a controlled sulfur content of 0,015 % to 0,030 % is recommended and permitted. For weldability, a controlled sulfur content of 0,008 % to 0,030 %
is recommended and permitted. For polishability, a controlled sulfur content of 0,015 % max. is recommended.
c
The stabilization may be made by use of Ti and/or Nb and/or Zr. According to the atomic mass of these elements and the content of Carbon and Nitrogen, the equivalence shall be the following:
Nb (% by mass) ≡ Zr (% by mass) ≡ 7/4 Ti (% by mass).
d
Ti + Nb: 8 × (C + N) to 0,80 %.
* Patented steel grade.
Table 5 — Chemical composition (cast analysis) of martensitic and precipitation hardening corrosion resistant steels
a
Steel designation
% by mass
c
Name Number Si Mn P S Cr Mo Ni Cu Others
C
Martensitic steels without minimum Mo content
0,08 to
b
X12Cr13 1.4006 1,00 1,50 0,040 11,5 to 13,5 - 0,75 - -
0,015
0,15
0,06 to
X12CrS13 1.4005 1,00 1,50 0,040 0,15 to 0,35 12,0 to 14,0 0,60 - - -
0,15
0,12 to
b
X15Cr13 1.4024 1,00 1,00 0,040 12,0 to 14,0 - - - -
0,015
0,17
0,16 to
b
X20Cr13 1.4021 1,00 1,50 0,040 12,0 to 14,0 - - - -
0,015
0,25
0,26 to
b
X30Cr13 1.4028 1,00 1,50 0,040 12,0 to 14,0 - - - -
0,015
0,36
0,25 to
X29CrS13 1.4029 1,00 1,50 0,040 0,15 to 0,25 12,0 to 13,5 0,60 - - -
0,32
0,36 to
b
X39Cr13 1.4031 1,00 1,00 0,040 12,5 to 14,5 - - - -
0,015
0,42
0,43 to
b
X46Cr13 1.4034 1,00 1,00 0,040 12,5 to 14,5 - - - -
0,015
0,50
0,43 to
X46CrS13 1.4035 1,00 2,00 0,040 0,15 to 0,35 12,5 to 14,0 - - - -
0,50
0,58 to
b e
X65Cr13 1.4037 1,00 1,00 0,040 12,5 to 14,5 - - -
0,015 N: see
0,70
N: 0,13 to 0,22
0,29 to
b
X34CrN16 1.4060 1,00 1,00 0,040 15,0 to 16,5 - - - (C + N) ≥ 0,45
0,015
0,38
(Cr + 16 × N - 5 × C) ≥ 16,2
0,12 to
b
X17CrNi16–2 1.4057 1,00 1,50 0,040 15,0 to 17,0 - 1,50 to 2,50 - -
0,015
0,22
a
Steel designation
% by mass
c
Name Number Si Mn P S Cr Mo Ni Cu Others
C
Martensitic steels with Mo
0,36 to
X38CrMo14 1.4419 1,00 1,00 0,040 0,015 13,0 to 14,5 0,60 to 1,00 - - -
0,42
0,48 to
b
X55CrMo14 1.4110 1,00 1,00 0,040 13,0 to 15,0 0,50 to 0,80 - - V: 0,15
0,015
0,60
X3CrNiMo13–4 1.4313 0,05 0,70 1,50 0,040 0,015 12,0 to 14,0 0,30 to 0,70 3,5 to 4,5 - N ≥ 0,020
X1CrNiMoCu12–5- 0,20 to
1.4422 0,020 0,50 2,00 0,040 0,003 11,0 to 13,0 1,30 to 1,80 4,0 to 5, 0 N: 0,020
2 0,80
V: 0,10 to 0,20
0,35 to
b
X50CrMoV15 1.4116 1,00 1,00 0,040 14,0 to 15,5 0,50 to 0,80 - -
0,015
e
0,55
N: see
0,60 to
b
X70CrMo15 1.4109 0,70 1,00 0,040 14,0 to 16,0 0,40 to 0,80 - - -
0,015
0,75
Ti: 0,010
X2CrNiMoV13–5-2 1.4415 0,030 0,50 0,50 0,040 0,015 11,5 to 13,5 1,50 to 2,50 4,5 to 6,5 -
V: 0,10 to 0,50
X1CrNiMoCu12–7- 0,20 to
1.4423 0,020 0,50 2,00 0,040 0,003 11,0 to 13,0 2,30 to 2,80 6,0 to 7, 0 N: 0,020
3 0,80
1,30
0,45 to V: 0,20 to 0,40
X53CrSiMoVN16–2 1.4150 to 0,80 0,030 0,010 15,0 to 16,5 0,20 to 0,40 0,40 -
0,60 N: 0,05 to 0,20
1,70
b
X4CrNiMo16–5-1 1.4418 0,06 0,70 1,50 0,040 15,0 to 17,0 0,80 to 1,50 4,0 to 6,0 - N ≥ 0,020
0,015
0,10 to
X14CrMoS17 1.4104 1,00 1,50 0,040 0,15 to 0,35 15,5 to 17,5 0,20 to 0,60 - - -
0,17
0,33 to
b
X39CrMo17–1 1.4122 1,00 1,50 0,040 15,5 to 17,5 0,80 to 1,30 1,00 - -
0,015
0,45
0,95 to
b
X105CrMo17 1.4125 1,00 1,00 0,040 16,0 to 18,0 0,40 to 0,80 - - -
0,015
1,20
0,35 to V: 1,50
X40CrMoVN16–2 1.4123 1,00 1,00 0,040 0,015 14,0 to 16,0 1,00 to 2,50 0,50 -
0,50 N: 0,10 to 0,30
0,85 to
b
X90CrMoV18 1.4112 1,00 1,00 0,040 17,0 to 19,0 0,90 to 1,30 - - V: 0,07 to 0,12
0,015
0,95
a
Steel designation
% by mass
c
Name Number Si Mn P S Cr Mo Ni Cu Others
C
Precipitation hardening steels without minimum Mo content
b
X5CrNiCuNb16–4 1.4542 0,07 0,70 1,50 0,040 15,0 to 17,0 0,60 3,00 to 5,0 3,00 to 5,0 Nb: 5 × C to 0,45
0,015
d
X7CrNiAl17–7 1.4568 0,09 0,70 1,00 0,040 0,015 16,0 to 18,0 - - Al: 0,70 to 1,50
6,5 to 7,8
Precipitation hardening steels with Mo
X5CrNiMoCuNb14 1,20 to
1.4594 0,07 0,70 1,00 0,040 0,015 13,0 to 15,0 1,20 to 2,00 5,0 to 6,0 Nb: 0,15 to 0,60
–5 2,00
Al: 0,60 to 0,80
X1CrNiMoAlTi12–
1.4530 0,015 0,10 0,10 0,010 0,005 11,5 to 12,5 1,85 to 2,15 8,5 to 9,5 - Ti: 0,28 to 0,37
9-2
N: 0,010
Al: 0,80 to 1,10
X1CrNiMoAlTi12–
1.4596 0,015 0,10 0,10 0,010 0,005 11,5 to 12,5 1,85 to 2,15 9,2 to 10,2 - Ti: 0,28 to 0,40
10–2
N: 0,020
Al: 1,35 to 1,75
X1CrNiMoAlTi12–
1.4612 0,015 0,10 0,10 0,010 0,005 11,0 to 12,5 1,75 to 2,25 10,2 to 11,3 - Ti: 0,20 to 0,50
11–2
N: 0,010
B: 0,001 0 to 0,010
X5NiCrTiMoVB25– 1,00 to Al: 0,35
1.4606 0,08 1,00 0,025 0,015 13,0 to 16,0 1,00 to 1,50 24,0 to 27,0 -
15–2 2,00 Ti: 1,90 to 2,30
V: 0,10 to 0,50
Elements not quoted (“-”) or not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate
precautions shall be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the
steel.
a
Maximum values unless indicated otherwise.
b
For bars, rods, wire, sections, bright products and the relevant semi-finished products, a maximum content of 0,030 % S applies. Particular ranges of sulfur content may provide
improvement of particular properties. For machinability a controlled sulfur content of 0,015 % to 0,030 % is recommended and permitted. For weldability, a controlled sulfur content
of 0,008 % to 0,030 % is recommended and permitted. For polishability, a controlled sulfur content of 0,015 % max. is recommended.
c
Tighter carbon ranges may be agreed at the time of enquiry and order.
d
For better cold deformability, the upper limit may be increased to 8,3 %.
e
For increased mechanical properties, nitrogen may be added up to 0,20 %.
Table 6 — Chemical composition (cast analysis) of austenitic and austenitic- ferritic heat-resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Ni N Others
X8CrNiTi18–10 1.4878 0,10 1,00 2,00 0,045 0,015 17,0 to 19,0 9,0 to 12,0 - Ti: 5 × C to 0,80
X6CrNiSiNCe19–10 1.4818 0,04 to 0,08 1,00 to 2,00 1,00 0,045 0,015 18,0 to 20,0 9,0 to 11,0 0,12 to 0,20 Ce: 0,03 to 0,08
b b
X15CrNiSi25–4 1.4821 0,10 to 0,20 0,8 to 1,50 2,00 0,040 0,015 24,5 to 26,5 3,5 to 5,5 0,10 -
X15CrNiSi20–12 1.4828 0,20 1,50 to 2,50 2,00 0,045 0,015 19,0 to 21,0 11,0 to 13,0 0,10 -
X9CrNiSiNCe21–
1.4835 0,05 to 0,12 1,40 to 2,50 1,00 0,045 0,015 20,0 to 22,0 10,0 to 12,0 0,12 to 0,20 Ce: 0,03 to 0,08
11–2
X12CrNi23–13 1.4833 0,15 1,00 2,00 0,045 0,015 22,0 to 24,0 12,0 to 14,0 0,10 -
X25CrMnNiN25–9- 8,0 to
1.4872 0,20 to 0,30 1,00 0,045 0,015 24,0 to 26,0 6,0 to 8,0 0,20 to 0,40 -
7 10,0
X8CrNi25–21 1.4845 0,10 1,50 2,00 0,045 0,015 24,0 to 26,0 19,0 to 22,0 0,10 -
X15CrNiSi25–21 1.4841 0,20 1,50 to 2,50 2,00 0,045 0,015 24,0 to 26,0 19,0 to 22,0 0,10 -
X12NiCrSi35–16 1.4864 0,15 1,00 to 2,00 2,00 0,045 0,015 15,0 to 17,0 33,0 to 37,0 0,10 -
Al: 0,15 to 0,60
X10NiCrAlTi32–21 1.4876 0,12 1,00 2,00 0,030 0,015 19,0 to 23,0 30,0 to 34,0 -
Ti: 0,15 to 0,60
X10NiCrSi35–19 1.4886 0,15 1,00 to 2,00 2,00 0,030 0,015 17,0 to 20,0 33,0 to 37,0 0,10 -
X10NiCrSiNb35–22 1.4887 0,15 1,00 to 2,00 2,00 0,030 0,015 20,0 to 23,0 33,0 to 37,0 0,10 Nb: 1,00 to 1,50
Al: 0,025
X6NiCrNbCe32–27 1.4877 0,04 to 0,08 0,30 1,00 0,020 0,010 26,0 to 28,0 31,0 to 33,0 0,10 Ce: 0,05 to 0,10
Nb: 0,60 to 1,00
X6NiCrSiNCe35–25 1.4854 0,04 to 0,08 1,20 to 2,00 2,00 0,040 0,015 24,0 to 26,0 34,0 to 36,0 0,12 to 0,20 Ce: 0,03 to 0,08
Elements not quoted (“-”) or not listed in the table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All
appropriate precautions shall be taken to avoid addition of such elements from scrap and other materials used in production which would impair mechanical properties and
the suitability of the steel.
a
Maximum values unless indicated otherwise.
b
Austenitic-ferritic grade.
Table 7 — Chemical composition (cast analysis) of ferritic heat-resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Al Others
X10CrAlSi7 1.4713 0,12 0,50 to 1,00 1,00 0,040 0,015 6,0 to 8,0 0,50 to 1,00 -
X10CrAlSi13 1.4724 0,12 0,70 to 1,40 1,00 0,040 0,015 12,0 to 14,0 0,70 to 1,20 -
X10CrAlSi18 1.4742 0,12 0,70 to 1,40 1,00 0,040 0,015 17,0 to 19,0 0,70 to 1,20 -
X3CrAlTi18–2 1.4736 0,04 1,00 1,00 0,040 0,015 17,0 to 18,0 1,70 to 2,10 Ti: [4 (C + N) +0,2] to 0,80
X10CrAlSi25 1.4762 0,12 0,70 to 1,40 1,00 0,040 0,015 23,0 to 26,0 1,20 to 1,70 -
X18CrN28 1.4749 0,15 to 0,20 1,00 1,00 0,040 0,015 26,0 to 29,0 - N: 0,15 to 0,25
Elements not quoted (“-”) or not listed in the table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All
appropriate precautions shall be taken to avoid addition of such elements from scrap and other materials used in production which would impair mechanical properties and the
suitability of the steel.
a
Maximum values unless indicated otherwise.
Table 8 — Chemical composition (cast analysis) of austenitic creep-resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Al Nb Ti V W Others
Austenitic creep resistant steels without minimum Mo content
17,0 to
0,04 to 8,0 to
X6CrNi18–10 1.4948 1,00 2,00 0,035 0,015 - 0,10 - - - - - -
0,08 11,0
19,0
17,0 to 9,0 to
0,04 to 10 × C to
X7CrNiNb18–10 1.4912 1,00 2,00 0,045 0,015 - - - - - - -
0,10 1,20
19,0 12,0
5 × (C+N
0,04 to 17,0 to 9,0 to
)
X7CrNiTi18–10 1.4940 1,00 2,00 0,040 0,015 - 0,10 - - - - -
0,08 19,0 13,0
to 0,80
17,0 to
0,04 to 9,0 to 5 × C to B: 0,001 5
X6CrNiTiB18–10 1.4941 1,00 2,00 0,035 0,015  - - - - -

0,08 19,0 12,0 0,80 to 0,005 0
15,0 to
0,04 to 0,30 to 12,0 to 10 × C to
X8CrNiNb16–13 1.4961 1,50 0,035 0,015 - - - - - - -
0,10 0,60 14,0 1,20
17,0
15,5 to
0,07 to 12,5 to 0,40 to 2,50 to B: 0,001 5
X12CrNiWTiB16–13 1.4962 0,50 1,50 0,035 0,015 - - - - -
0,15 14,5 0,70 3,00 to 0,006 0
17,5
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Al Nb Ti V W Others
15,5 to
0,04 to 0,30 to 15,5 to 0,06 to 10 × C to 2,50 to
X6CrNiWNbN16–16 1.4945 1,50 0,035 0,015 - - - - -
0,10 0,60 17,5 0,14 1,20 3,5
17,5
22,0 to
0,04 to 12,0 to
X6CrNi23–13 1.4950 0,70 2,00 0,035 0,015 - 0,10 - - - - - -
0,08 15,0
24,0
24,0 to
0,04 to 19,0 to
X6CrNi25–20 1.4951 0,70 2,00 0,035 0,015 - 0,10 - - - - - -
0,08 22,0
26,0
19,0 to
0,03 to 30,0 to 0,20 to 0,20 to Co: 0,50
X5NiCrAlTi31–20 1.4958 0,70 1,50 0,015 0,010 - 0,030 0,10 - -
0,08 32,5 0,50 0,50 Cu: 0,50
22,0
19,0 to
0,05 to 30,0 to 0,25 to 0,25 to Co: 0,50
X8NiCrAlTi32–21 1.4959 0,70 1,50 0,015 0,010 - 0,030 - - -
0,10 34,0 0,65 0,65 Cu: 0,50
22,0
Austenitic creep resistant steels with Mo
14,0 to
X10CrNiMoMnNbVB15– 0,07 to 5,5 to 0,80 to 9,0 to 0,75 to 0,15 to B:0,003 to
1.4982 1,00 0,040 0,030 0,10 - - -
10–1 0,13 7,0 1,20 11,0 1,25 0,40 0,009
16,0
0,04 to 0,30 to 15,5 to 1,10 to 12,5 to 0,06 to 10 × C to 0,60 to
X8CrNiMoVNb16–13 1.4988 1,50 0,035 0,015 - - - -
0,10 0,60 17,5 1,50 14,5 0,14 1,20 0,85
0,04 to 0,30 to 15,5 to 1,60 to 15,5 to 10 × C to
X8CrNiMoNb16–16 1.4981 1,50 0,035 0,015 - - - - - -
0,10 0,60 17,5 2,00 17,5 1,20
Nb + Ta:
0,04 to 0,30 to 15,5 to 1,60 to 15,5 to B: 0,05 to
X7CrNiMoBNb16–16 1.4986 1,50 0,045 0,030 - - 10 × C to - - -
0,10 0,60 17,5 2,00 17,5 0,10
1,20
16,5 to
0,04 to 2,00 to 10,0 to B: 0,001 5
X6CrNiMoB17–12–2 1.4919 1,00 2,00 0,035 0,015 0,10 - - - - -
0,08 2,50 13,0 to 0,005 0
18,5
0,04 to 16,0 to 2,00 to 12,0 to 5 × C to B: 0,0015
X6CrNiMoTiB17–13 1.4983 0,75 2,00 0,035 0,015 - - - - -
0,08 18,0 2,50 14,0 to 0,0060
0,80
0,04 to 16,0 to 2,00 to 12,0 to
X6CrNiMo17–13–2 1.4918 0,75 2,00 0,035 0,015 0,10 - - - - - -
0,08 18,0 2,50 14,0
16,0 to 2,00 to 12,0 to 0,10 to B: 0,001 5
X3CrNiMoBN17–13–3 1.4910 0,04 0,75 2,00 0,035 0,015 - - - - -
18,0 3,00 14,0 0,18 to 0,005 0
0,08 to 20,0 to 2,50 19,0 to 0,10 to 0,75 to 2,00 to Co: 18,5 to
X12CrCoNi21–20 1.4971 1,00 2,00 0,035 0,015 - - -
0,16 22,5 to 3,5 21,0 0,20 1,25 3,00 21,0
13,5 to
0,03 to 1,00 to 1,00 to 24,0 to 1,90 to 0,10 to B: 0,003 0
X6NiCrTiMoVB25–15–2 1.4980 1,00 0,025 0,015 - 0,35 - -
0,08 2,00 1,50 27,0 2,30 0,50 to 0,010
16,0
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Al Nb Ti V W Others
Elements not quoted (“-”) or not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions shall
be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
a
Maximum values unless indicated otherwise.
Table 9 — Chemical composition (cast analysis) of martensitic creep-resistant steels
a
Steel designation
% by mass
Name Number C Si Mn P S Cr Mo Ni N Al Nb V W Others
0,08 to 0,30 to 0,85 to 0,030 to 0,060 to 0,18 to
X10CrMoVNb9–1 1.4903 0,50 0,025 0,015 8,0 to 9,5 0,40 0,040 - -
0,12 0,60 1,05 0,070 0,10 0,25
X11CrMoWVNb9–1- 0,09 to 0,10 to 0,30 to 0,90 to 0,10 to 0,050 to 0,060 to 0,18 to 0,90 to B: 0,000 5 to
1.4905 0,020 0,010 8,5 to 9,5 0,040
1 0,13 0,50 0,60 1,10 0,40 0,090 0,10 0,25 1,10 0,005 0
0,17 to 0,40 to 10,0 to 0,50 to 0,20 to 0,050 to 0,25 to 0,10 to
X19CrMoNbVN11–1 1.4913 0,50 0,025 0,015 0,020 - B: 0,0015
0,23 0,90 11,5 0,80 0,60 0,10 0,55 0,30
0,17 to 0,30 to 10,0 to 0,80 to 0,30 to 0,20 to
X20CrMoV11–1 1.4922 0,40 0,025 0,015 - - - - -
0,23 1,00 12,5 1,20 0,80 0,35
0,18 to 0,40 to 11,0 to 0,80 to 0,30 to 0,25 to
X22CrMoV12–1 1.4923 0,50 0,025 0,015 - - - - -
0,24 0,90 12,5 1,20 0,80 0,35
0,17 to 0,10 to 0,30 to 11,0 to 0,80 to 0,30 to 0,20 to 0,40 to
X20CrMoWV12–1 1.4935 0,025 0,015 - - - -
0,24 0,50 0,80 12,5 1,20 0,80 0,35 0,60
0,08 to 0,40 to 11,0 to 1,50 to 2,00 to 0,020 to 0,25 to
X12CrNiMoV12–3 1.4938 0,50 0,025 0,015 - - - -
0,15 0,90 12,5 2,00 3,00 0,040 0,40
0,05 to 0,10 to 0,30 to 0,50 to 0,20 to 0,20 to 0,10 to B:
...