Stainless steels for general purposes

ISO 16143-2:2014 specifies the technical delivery conditions for semi-finished products, hot formed bars, rods, and sections for general purposes made of the most important corrosion-resistant stainless steel grades.

Aciers inoxydables pour usage général

General Information

Status
Published
Publication Date
19-May-2014
Current Stage
6060 - International Standard published
Start Date
20-Mar-2014
Completion Date
20-May-2014
Ref Project

RELATIONS

Buy Standard

Standard
ISO 16143-2:2014 - Stainless steels for general purposes
English language
38 pages
sale 15% off
Preview
sale 15% off
Preview
Standard
ISO 16143-2:2014 - Stainless steels for general purposes
English language
38 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

INTERNATIONAL ISO
STANDARD 16143-2
Second edition
2014-05-15
Stainless steels for general
purposes —
Part 2:
Corrosion-resistant semi-finished
products, bars, rods and sections
Aciers inoxydables pour usage général —
Partie 2: Demi-produits, barres, fils machine et profils en acier
résistant à la corrosion
Reference number
ISO 16143-2:2014(E)
ISO 2014
---------------------- Page: 1 ----------------------
ISO 16143-2:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 16143-2:2014(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Designation ................................................................................................................................................................................................................ 2

5 Information to be supplied by the purchaser......................................................................................................................... 2

6 Classification of grades .................................................................................................................................................................................. 3

7 Requirements .......................................................................................................................................................................................................... 3

7.1 Manufacturing process..................................................................................................................................................................... 3

7.2 Delivery condition ................................................................................................................................................................................ 3

7.3 Chemical composition ...................................................................................................................................................................... 3

7.4 Susceptibility to intergranular corrosion ........................................................................................................................ 4

7.5 Mechanical properties ...................................................................................................................................................................... 4

7.6 Surface quality ......................................................................................................................................................................................... 4

7.7 Internal soundness .............................................................................................................................................................................. 5

7.8 Dimensions, tolerances on dimensions, and shape ................................................................................................. 5

8 Inspection, testing, and conformance of products ............................................................................................................ 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 Inspection and testing procedures and types of inspection documents ............................................... 5

8.3 Specific inspection and testing .................................................................................................................................................. 6

8.4 Test methods ............................................................................................................................................................................................. 6

8.5 Retests ............................................................................................................................................................................................................ 7

9 Marking .......................................................................................................................................................................................................................... 7

Annex A (informative) Guidelines for further treatment (including heat treatment)

in fabrication .........................................................................................................................................................................................................29

Annex B (informative) Designations of the steels given in Table 2 and of comparable grades

covered in ASTM, EN, JIS, and GB Standards ..........................................................................................................................34

Annex C (informative) Applicable dimensional standards ........................................................................................................37

Bibliography .............................................................................................................................................................................................................................38

© ISO 2014 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 16143-2:2014(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and

alloy steels.

This second edition cancels and replaces the first edition (ISO 16143-2:2004), which has been technically

revised.

ISO 16143 consists of the following parts, under the general title Stainless steels for general purposes:

— Part 1: Corrosion-resistant flat products
— Part 2: Corrosion-resistant semi-finished products, bars, rods and sections
— Part 3: Wire
iv © ISO 2014 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 16143-2:2014(E)
Stainless steels for general purposes —
Part 2:
Corrosion-resistant semi-finished products, bars, rods and
sections
1 Scope

This part of ISO 16143 specifies the technical delivery conditions for semi-finished products, hot formed

bars, rods, and sections for general purposes made of the most important corrosion-resistant stainless

steel grades.

NOTE 1 Throughout this part of ISO 16143, the term “general purposes” means purposes other than the special

purposes mentioned in the Bibliography.

NOTE 2 Heat-resistant steel grades can be found in ISO 4955 and they can be used for corrosion-resistant

purposes.

In addition to this part of ISO 16143, the general technical delivery requirements of ISO 404 are applicable.

This part of ISO 16143 does not apply to components manufactured by further processing the product

forms listed in the first paragraph above with quality characteristics altered as a result of such further

processing.
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.

ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method

ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical

testing
ISO 404, Steel and steel products — General technical delivery requirements

ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,

austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid

ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method

ISO 6892-1:2009, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 6892-2, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature

ISO 6929, Steel products — Vocabulary

ISO 9443, Heat-treatable and alloy steels — Surface quality classes for hot-rolled round bars and wire

rods — Technical delivery conditions
ISO 10474, Steel and steel products — Inspection documents

ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition
© ISO 2014 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 16143-2:2014(E)
ISO 15510, Stainless steels — Chemical composition

ISO 20723, Structural steels — Surface condition of hot-rolled sections — Delivery requirements

ISO/TS 4949, Steel names based on letter symbols
ISO/TR 9769, Steel and iron — Review of available methods of analysis
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6929 and the following apply.

3.1
corrosion-resistant stainless steel

steel with at least 10,5 % (mass fraction) Cr and a maximum of 1,2 % (mass fraction) C for which

resistance to corrosion is of primary importance
3.2
product form
shape of a product
Note 1 to entry: See ISO 6929 for different forms of products.
4 Designation

For the steel grades covered by this part of ISO 16143, the steel names as given in the tables are allocated

in accordance with ISO/TS 4949.

For the steel grades covered by this part of ISO 16143, the steel numbers as given in the tables are

allocated in accordance with ISO 15510.
5 Information to be supplied by the purchaser

It shall be the responsibility of the purchaser to specify all requirements that are necessary for products

under this part of ISO 16143. Such requirements to be considered include, in the order listed but not

limited to, the following:
a) the desired quantity;
b) the product form (e.g. square bar or round rod);

c) the number of the appropriate dimensional standard (see Annex C), the nominal dimensions, plus

any choice of requirements;
d) the type of material (steel);
e) the number of this part of ISO 16143 (i.e. ISO 16143-2);
f) the steel name or steel number;

g) if, for the relevant steel in Tables 5 to 9 for the mechanical properties, more than one treatment

condition is covered, the symbol for the desired heat treatment;
h) the desired process route (see symbols in Table 4);

i) if a verification of internal soundness is required, the requirements have to be agreed at the time of

enquiry and order;

j) any further optional test agreed between the manufacturer and purchaser at the time of enquiry

and order [see 8.2.3 b)];
2 © ISO 2014 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 16143-2:2014(E)

k) the type of inspection document and its designation in accordance with ISO 10474 (see 8.2.1).

EXAMPLE 10 t round bar in accordance with ISO 1035-1 and ISO 1035-4 of 50 mm diameter made of a

steel grade with name X5CrNi18-10 and number 4301-304-00-I as specified in ISO 16143-2 in process route 1D,

inspection certificate 3.1 as specified in ISO 10474, is designated as follows:
10 t round bar ISO 1035-1 and -4 – 50
Steel ISO 16143-2 – X5CrNi18-10 + 1D
ISO 10474 – 3.1
10 t round bar ISO 1035-1 and -4 – 50
Steel ISO 16143-2 – 4301-304-00-I + 1D
ISO 10474 – 3.1
6 Classification of grades

Corrosion-resistant stainless steels covered by this part of ISO 16143 are classified according to their

structure into
— austenitic steels,
— austenitic-ferritic steels,
— ferritic steels,
— martensitic steels, or
— precipitation-hardening steels.
7 Requirements
7.1 Manufacturing process

Unless a special steelmaking process is agreed upon when ordering, the steelmaking process shall

be at the discretion of the manufacturer. When he so requests, the purchaser shall be informed what

steelmaking process is being used.
7.2 Delivery condition

The products shall be supplied in the delivery condition agreed in the order by reference to the process

route given in Table 4 and, where different alternatives exist, to the treatment conditions given in

Tables 5 to 9 (see also Annex A).
7.3 Chemical composition

7.3.1 The chemical composition requirements given in Table 2 apply with respect to the chemical

composition of the cast analysis.

7.3.2 The product analysis can deviate from the limiting values for the cast analysis given in Table 2 by

the values listed in Table 3.
© ISO 2014 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO 16143-2:2014(E)
7.4 Susceptibility to intergranular corrosion

Referring to resistance to intergranular corrosion as defined in ISO 3651-2, for austenitic, austenitic-

ferritic, and ferritic steels, the specifications in Tables 5, 6, and 7 apply.

The susceptibility of stainless steels to intergranular corrosion is dependent on the type of environment

and therefore cannot always be clearly ascertained through standard laboratory tests. The selection of

the test or tests to be agreed upon should be based on experience with the use of the selected grade of

steel in the intended environment.
7.5 Mechanical properties

The mechanical properties at room temperature as specified in Tables 5 to 9 apply for the relevant

specified heat-treatment condition. This does not apply to process route 1U (hot rolled, not heat treated,

not descaled). If, by agreement at the time of ordering, the products are to be supplied in a non-heat-

treated condition, the mechanical properties specified in Tables 5 to 9 shall be obtainable from reference

test pieces that have received the appropriate heat treatment (simulated heat treatment).

The values in Tables 10 to 14 apply for the 0,2 %- and 1 %-proof strength at elevated temperatures.

NOTE Austenitic steels are insensitive to brittle fracture in the solution-annealed condition. Because they

do not have a pronounced transition temperature, which is characteristic of other steels, they are also useful for

application at cryogenic temperatures.
7.6 Surface quality

The available surface finishes are given in Table 4. Slight surface imperfections, inherent to the

production process, are permitted. Exact requirements concerning the maximum depth of acceptable

discontinuities for bars, rods, and sections in the relevant conditions are given in Table 1.

Table 1 — Maximum depth of acceptable discontinuities for bars, rods, and sections

Max. % of delivered weight in

Conditions Product forms Permissible depth of discontinuities excess of permissible depth of

discontinuities

1U, 1C, 1E, 1D Sections To be agreed upon at the time of enquiry and order on the basis of

ISO 20723.

1U, 1C, 1E, 1D Rounds and rod Unless not specified otherwise at the time of enquiry and order, ISO 9443

class 1 za2.
1X Rounds — max. 0,2 mm for d ≤ 20 mm 1 %
— max. 0,01 d for 20 mm < d ≤ 75 mm
— max. 0,75 mm for d > 75 mm
Hexagons — max. 0,3 mm for d ≤ 15 mm 2 %
— max. 0,02 d for 15 mm < d ≤ 63 mm
Other bars — max. 0,3 mm for d ≤ 15 mm 4 %
— max. 0,02 d for 15 mm < d ≤ 63 mm
1G Rounds Technically defect free by manufacture. 0,2 %

Depth of discontinuities is understood as being the distance, measured normally to the surface, between the bottom of

the discontinuities and that surface.

At the time of enquiry and order, it can be agreed that the product shall be delivered with a surface that is technically

defect free by manufacture. In this case, also the maximum % of delivered weight in excess of permissible depth of

discontinuities shall be agreed.
For further information, see Table 4.
4 © ISO 2014 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 16143-2:2014(E)
7.7 Internal soundness

For internal soundness, where appropriate, any requirements, together with the conditions for their

verification, can be agreed upon at the time of enquiry and order.
7.8 Dimensions, tolerances on dimensions, and shape

The dimensions and the tolerances on dimensions and shape are to be agreed upon at the time of enquiry

and order, as far as possible with reference to the dimensional standards listed in Annex C.

8 Inspection, testing, and conformance of products
8.1 General

The manufacturer shall carry out appropriate process control, inspection, and testing to ensure that the

delivery complies with the requirements of the order.
This includes the following:
— a suitable frequency of verification of the dimensions of the products;

— an adequate intensity of visual examination of the surface quality of the products;

— an appropriate frequency and type of test to ensure that the correct grade of steel is delivered.

The nature and frequency of these verifications, examinations, and tests are determined by the

manufacturer, based on the degree of consistency that has been determined by the evidence of his

quality system. In view of this, verifications by specific tests for these requirements are not necessary

unless otherwise agreed upon.
8.2 Inspection and testing procedures and types of inspection documents

8.2.1 Products complying with this part of ISO 16143 shall be ordered and delivered with one of the

inspection documents as specified in ISO 10474. The type of document shall be agreed upon at the time

of enquiry and order. If the order does not contain any specification of this type, a test report 2.2 shall be

issued.

8.2.2 If, in accordance with the agreements made at the time of enquiry and order, a test report is to be

provided, this shall cover
a) a statement that the material complies with the requirements of the order and

b) the results of the cast analysis for all elements specified for the type of steel supplied.

8.2.3 If, in accordance with the agreements in the order, an inspection certificate 3.1 or 3.2 is to be

provided, the specific inspections and tests described in 8.3 shall be carried out and their results shall be

certified in the document.
In addition to 8.2.2, the document shall cover

a) the results of the mandatory tests marked in the second column of Table 15 by an “m” and

b) the results of any optional test or inspections agreed upon when ordering marked in the second

column of Table 15 by an “o”.
© ISO 2014 – All rights reserved 5
---------------------- Page: 9 ----------------------
ISO 16143-2:2014(E)
8.3 Specific inspection and testing
8.3.1 Extent of testing

The tests to be carried out, either mandatorily (m) or by agreement (o), and the composition and size

of the test units, and the number of sample products, samples, and test pieces to be taken are given in

Table 15.
8.3.2 Selection and preparation of samples and test pieces

8.3.2.1 The general conditions for selection and preparation of samples and test pieces shall be in

accordance with ISO 377 and ISO 14284.

8.3.2.2 The samples for the tensile test shall be taken in accordance with Figures 1 to 3.

The samples shall be taken from products in the as-delivered condition. If agreed, samples from bars

can be taken before straightening. For martensitic and precipitation-hardened grades being delivered in

the annealed condition, a test to demonstrate the capability of further treatment to one of the specified

conditions shall be conducted by the manufacturer on a sample taken from the product in the as-

delivered condition and further treated in accordance with a listed production route. Unless specified

in the order, that final condition and details of conditions of further treatment shall be at the option of

the manufacturer.

8.3.2.3 Samples for the hardness test and for the resistance to intergranular corrosion test, where

requested, shall be taken from the same locations as those for the mechanical tests.

8.4 Test methods

8.4.1 Unless otherwise agreed when ordering, the choice of a suitable physical or chemical method of

analysis to determine the product analysis is at the discretion of the manufacturer. In cases of dispute, the

analysis shall be carried out by a laboratory approved by the two parties. In these cases, the reference

method of analysis shall be agreed upon, where possible, with reference to ISO/TR 9769.

8.4.2 The tensile test shall be carried out in accordance with ISO 6892-1 and it shall be performed

under controlled conditions in accordance with Clause 5 of ISO 6892-1:2009.

Unless otherwise agreed, the tensile strength and elongation after fracture shall be determined and,

in addition, for ferritic, martensitic, precipitation-hardening, austenitic free-cutting, and austenitic-

ferritic steels, the 0,2 %-proof strength, and for austenitic steels, the 0,2 %- and 1 %-proof strength.

For bars made of resulfurized grades, it can be agreed upon to determine the hardness instead.

If a tensile test at elevated temperature has been ordered, this shall be carried out in accordance with

ISO 6892-2. If the proof strength is to be verified, the 0,2 %-proof strength shall be determined, for

ferritic, martensitic, precipitation-hardening, and austenitic-ferritic steels. In the case of austenitic

steels, the 0,2 %- and the 1 %-proof strength shall be determined.

8.4.3 If an impact test has been ordered, it shall be carried out in accordance with ISO 148-1 on test

pieces with a V-notch and a 2 mm hammer. The average obtained from three test pieces is considered to

be the test result (see also ISO 404).

8.4.4 The Brinell hardness test shall be carried out in accordance with ISO 6506-1.

8.4.5 The resistance to intergranular corrosion shall be tested in accordance with ISO 3651-2, unless

otherwise agreed.
6 © ISO 2014 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 16143-2:2014(E)

8.4.6 Dimensions and dimensional tolerances of the products shall be tested in accordance with the

requirements of the relevant dimensional standards given in Annex C.
8.5 Retests
See ISO 404.
9 Marking

9.1 The products shall be marked with the manufacturer’s trademark or symbol and the steel name or

number. The product shall also be marked with the cast number, thickness, or dimension, as well as an

identification number related to an appropriate inspection certificate.

9.2 Unless otherwise agreed, the method of marking and the material of marking shall be at the option

of the manufacturer. Its quality shall be such that it shall be durable for at least one year, can withstand

normal handling, and can be stored in unheated storage under cover. The corrosion resistance of the

product shall not be impaired by the marking.
9.3 Each unit shall be marked:

— for semi-finished products, bars, and sections, by means of labels attached to the bundle or, by

agreement at the time of enquiry and order, by inking, adhesive labels, electrolytic etching, or

stamping;
— for rods, by means of a label attached to the coil.
© ISO 2014 – All rights reserved 7
---------------------- Page: 11 ----------------------
ISO 16143-2:2014(E)
8 © ISO 2014 – All rights reserved
Table 2 — Chemical composition (cast analysis)
Steel designation % (mass fraction)
Name ISO number C Si Mn P S Cr Mo Ni N Others
Austenitic steels

X10CrNi18-8 4310-301-00-I 0,05 to 0,15 2,00 2,00 0,045 0,030 16,0 to 19,0 0,80 6,0 to 9,5 0,10 —

X2CrNi18-9 4307-304-03-I 0,030 1,00 2,00 0,045 0,030 17,5 to 19,5 — 8,0 to 10,0 0,10 —

X10CrNiS18-9 4305-303-00-I 0,12 1,00 2,00 0,060 ≥0,15 17,0 to 19,0 — 8,0 to 10,0 0,10 Cu:

0,12 to

X2CrNiN18-9 4311-304-53-I 0,030 1,00 2,00 0,045 0,030 17,5 to 19,5 — 8,0 to 10,0 —

0,22

X3CrNiCu18-9-4 4567-304-30-I 0,04 1,00 2,00 0,045 0,030 17,0 to 19,0 — 8,0 to 10,5 0,10 Cu: 3,0 to 4,0

Cu: 1,40 to

X6CrNiCuS18-9-2 4570-303-31-I 0,08 1,00 2,00 0,045 ≥0,15 17,0 to 19,0 0,60 8,0 to 10,0 0,10

1,80
0,10 to

X5CrNiN19-9 4315-304-51-I 0,08 1,00 2,50 0,045 0,030 18,0 to 20,0 — 7,0 to 10,5 —

0,30

X5CrNi18-10 4301-304-00-I 0,07 1,00 2,00 0,045 0,030 17,5 to 19,5 — 8,0 to 10,5 0,10 —

Ti: 5 × C to

X6CrNiTi18-10 4541-321-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — 9,0 to 12,0 —

0,70
Nb: 10 × C to

X6CrNiNb18-10 4550-347-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — 9,0 to 12,0 —

1,00

X2CrNi19-11 4306-304-03-I 0,030 1,00 2,00 0,045 0,030 18,0 to 20,0 — 10,0 to 12,0 0,10 —

X6CrNi18-12 4303-305-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — 10,5 to 13,0 0,10 —

---------------------- Page: 12 ----------------------
ISO 16143-2:2014(E)
© ISO 2014 – All rights reserved 9
Table 2 — (continued)
Steel designation % (mass fraction)
Name ISO number C Si Mn P S Cr Mo Ni N Others

X8CrMnCuN17-8-3 4597-204-76-I 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 Cu: 2,00 to 3,5

g g

X3CrMnNiCu15-8-5-3 4615-201-75-E 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 Cu: 2,0 to 4,0

7,5 to

X12CrMnNiN18-9-5 4373-202-00-I 0,15 1,00 0,060 0,030 17,5 to 19,0 — 4,0 to 6,0 0,15 to 0,30 —

10,0
0,50 to

X11CrNiMnN19-8-6 4369-202-91-I 0,07 to 0,15 5,0 to 7,5 0,030 0,015 17,5 to 19,5 — 6,5 to 8,5 0,20 to 0,30 —

1,00

X1CrNi25-21 4335-310-02-I 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

X2CrNiMo17-12-2 4404-316-03-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 3,00 10,0 to 13,0 0,10 —

X5CrNiMo17-12-2 4401-316-00-I 0,07 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 3,00 10,0 to 13,0 0,10 —

X6CrNiMoTi17-12-2 4571-316-35-I 0,08 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 2,50 10,5 to 13,5 — Ti: 5 × C to 0,70

X2CrNiMo17-12-3 4432-316-03-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 10,5 to 13,0 0,10 —

X3CrNiMo17-12-3 4436-316-00-I 0,05 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 10,5 to 13,0 0,10 —

X2CrNiMoN17-12-3 4429-316-53-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 10,5 to 13,0 0,12 to 0,22 —

X2CrNiMo18-14-3 4435-316-91-I 0,030 1,00 2,00 0,045 0,015 17,0 to 19,0 2,50 to 3,00 12,5 to 15,0 0,10 —

X2CrNiMoN18-12-4 4434-317-53-I 0,030 1,00 2,00 0,045 0,030 16,5 to 19,5 3,0 to 4,0 10,5 to 14,0 0,10 to 0,20 —

X2CrNiMoN17-13-5 4439-317-26-E 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 —

X1CrNiMoCuN20-18-7 4547-312-54-I 0,020 0,70 1,00 0,035 0,015 19,5 to 20,5 6,0 to 7,0 17,5 to 18,5 0,18 to 0,25 Cu: 0,50 to 1,00

---------------------- Page: 13 ----------------------
ISO 16143-2:2014(E)
10 © ISO 2014 – All rights reserved
Table 2 — (continued)
Steel designation % (mass fraction)
Name ISO number C Si Mn P S Cr Mo Ni N Others

X1CrNiMoN25-22-2 4466-310-50-E 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 —

Cu: 1,00 to 2,00

X1CrNiMoCuNW24-22-6 4659-312-66-I 0,020 0,70 2,0 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

X1CrNiMoCuN24-22-8 4652-326-54-I 0,020 0,50 2,0 to 4,0 0,030 0,005 23,0 to 25,0 7,0 to 8,0 21,0 to 2

...

DRAFT INTERNATIONAL STANDARD ISO/DIS 16143-2
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on Voting terminates on
2012-12-03 2013-03-03

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION

Stainless steels for general purposes —
Part 2:
Semi-finished products, bars, rods and sections
Aciers inoxydables pour usage général —
Partie 2: Demi-produits, barres, fils machine et profils
[Revision of first edition (ISO 16143-2:2004)
ICS 77.140.20

To expedite distribution, this document is circulated as received from the committee

secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at

publication stage.

Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du

secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au

Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE

REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.

IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT

INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO

WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.

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.
© International Organization for Standardization, 2012
---------------------- Page: 1 ----------------------
ISO/DIS 16143-2
Copyright notice

This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted

under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be

reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,

photocopying, recording or otherwise, without prior written permission being secured.

Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s

member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2012 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 16143-2
Contents Page

Foreword ............................................................................................................................................................iv

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Designation ............................................................................................................................................2

5 Information to be supplied by the purchaser .....................................................................................2

6 Classification of grades........................................................................................................................3

7 Requirements.........................................................................................................................................3

7.1 Manufacturing process.........................................................................................................................3

7.2 Delivery condition .................................................................................................................................3

7.3 Chemical composition ..........................................................................................................................3

7.4 Susceptibility to intergranular corrosion............................................................................................3

7.5 Mechanical properties...........................................................................................................................4

7.6 Surface quality.......................................................................................................................................4

7.7 Internal soundness................................................................................................................................4

7.8 Dimensions, tolerances on dimensions and shape...........................................................................5

8 Inspection, testing and conformance of products.............................................................................5

8.1 General ...................................................................................................................................................5

8.2 Inspection and testing procedures and types of inspection documents........................................5

8.3 Specific inspection and testing ...........................................................................................................5

8.3.1 Extent of testing ....................................................................................................................................5

8.3.2 Selection and preparation of samples and test pieces .....................................................................5

8.4 Test methods .........................................................................................................................................6

8.5 Retests....................................................................................................................................................6

9 Marking...................................................................................................................................................6

Annex A (informative) Guidelines for further treatment (including heat treatment) in fabrication ..........27

Annex B (informative) Designations of the steels given in Table 2 and of comparable grades

covered in ASTM-, EN-, JIS- and GB-Standards ..............................................................................32

Annex C (informative) Applicable dimensional standards ...........................................................................35

Bibliography......................................................................................................................................................36

© ISO 2012 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 16143-2
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 16143-2 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable

and alloy steels.

This second edition cancels and replaces the first edition (ISO 16143-2:2004) which has been technically

revised.

ISO 16143 consists of the following parts, under the general title Stainless steels for general purposes:

 Part 1: Corrosion resistant flat products
 Part 2: Corrosion resistant semi-finished products, bars, rods and sections
 Part 3: Wire
iv © ISO 2012 – All rights reserved
---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 16143-2
Stainless steels for general purposes — Part 2: Corrosion
resistant semi-finished products, bars, rods and sections
1 Scope

This part of ISO 16143 specifies the technical delivery conditions for semi-finished products, hot formed bars,

rods and sections for general purposes made of the most important corrosion-resistant stainless steel grades.

NOTE Throughout this part of ISO 16143, the term “general purposes” means purposes other than the special

purposes mentioned in the Bibliography.

In addition to this part of ISO 16143, the general technical delivery requirements of ISO 404 are applicable.

This part of ISO 16143 does not apply to components manufactured by further processing the product forms

listed in the first paragraph above with quality characteristics altered as a result of such further processing.

2 Normative references

The following referenced documents are indispensable for the application 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.

ISO 148-1, Metallic materials – Charpy pendulum impact test – Part 1: Test method

ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical

testing
ISO 404, Steel and steel products — General technical delivery requirements

ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,

austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid

ISO/TS 4949, Steel names based on letter symbols
ISO 6506-1, Metallic materials - Brinell hardness test – Part 1: Test method

ISO 6892-1, Metallic materials - Tensile testing – Part 1: Method of test at room temperature

ISO 6892-2, Metallic materials - Tensile testing – Part 2: Method of test at elevated temperature

ISO 6929, Steel products — Definitions and classification
ISO/TR 9769, Steel and iron — Review of available methods of analysis
ISO 10474, Steel and steel products — Inspection documents

ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition
© ISO 2012 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/DIS 16143-2
ISO 15510, Stainless steels – Chemical composition
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6929 and the following apply.

3.1
corrosion resistant stainless steels

steels with at least 10,5 % (mass fraction) Cr and a maximum of 1,2 % (mass fraction) C for which resistance

to corrosion is of primary importance
3.2
product forms
See ISO 6929.
4 Designation

For the steel grades covered by this International Standard, the steel names as given in the tables are

allocated in accordance with ISO/TS 4949.

For the steel grades covered by this International Standard, the steel numbers as given in the tables are

allocated in accordance with ISO 15510.
5 Information to be supplied by the purchaser

It shall be the responsibility of the purchaser to specify all requirements that are necessary for products under

this specification. Such requirements to be considered include, in the order listed but not limited to, the

following:
a) the desired quantity;
b) the product form (e.g., square bar or round rod);

c) the number of the appropriate dimensional standard (see Annex C), the nominal dimensions, plus any

choice of requirements;
d) the type of material (steel);
e) the number of this International Standard, i.e. ISO 16143-2;
f) the steel name or steel number;

g) if, for the relevant steel in the Tables 5 to 9 for the mechanical properties, more than one treatment

condition is covered, the symbol for the desired heat treatment;
h) the desired process route (see symbols in Table 4);

i) if a verification of internal soundness is required, the requirements have to be agreed at the time of

enquiry and order;

j) any further optional test agreed between manufacturer and purchaser at the time of enquiry and order

(see 8.2.3.b);

k) the type of inspection document and its designation in accordance with ISO 10474 (see 8.2.1).

2 © ISO 2012 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/DIS 16143-2

EXAMPLE 10 t round bar in accordance with ISO 1035-1 and -4 of 50 mm diameter made of a steel grade with

name X5CrNi18-10 and number 4301-304-00-I as specified in ISO 16143-2 in process route 1D, inspection certificate 3.1

as specified in ISO 10474 is designated as follows:
10 t round bar ISO 1035-1 and -4 – 50
Steel ISO 16143-2 – X5CrNi18-10  1D
ISO 10474 – 3.1
10 t round bar ISO 1035-1 and -4 – 50
Steel ISO 16143-2 – 4301-304-00-I  1D
ISO 10474 – 3.1
6 Classification of grades

Corrosion resistant stainless steels covered by this part of ISO 16143 are classified according to their

structure into:
 austenitic steels;
 austenitic-ferritic steels;
 ferritic steels;
 martensitic steels;
 precipitation-hardening steels.
7 Requirements
7.1 Manufacturing process

Unless a special steelmaking process is agreed upon when ordering, the steelmaking process shall be at the

discretion of the manufacturer. When he so requests, the purchaser shall be informed what steelmaking

process is being used.
7.2 Delivery condition

The products shall be supplied in the delivery condition agreed in the order by reference to the process route

given in Table 4 and, where different alternatives exist, to the treatment conditions given in Tables 5 to 9

(see also Annex A).
7.3 Chemical composition

7.3.1 The chemical composition requirements given in Table 2 apply with respect to the chemical

composition of the cast analysis.

7.3.2 The product analysis may deviate from the limiting values for the cast analysis given in Table 2 by the

values listed in Table 3.

NOTE It is under discussion to change the deviations to the values according to ASTM.

7.4 Susceptibility to intergranular corrosion

Referring to resistance to intergranular corrosion as defined in ISO 3651-2, for austenitic, austenitic-ferritic

and ferritic steels the specifications in Tables 5, 6 and 7 apply.
© ISO 2012 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO/DIS 16143-2

NOTE The susceptibility of stainless steels to intergranular corrosion is dependent on the type of environment and

therefore cannot always be clearly ascertained through standard laboratory tests. The selection of the test or tests to be

agreed upon should be based on experience with the use of the selected grade of steel in the intended environment.

7.5 Mechanical properties

The mechanical properties at room temperature as specified in Tables 5 to 9 apply for the relevant specified

heat-treatment condition. This does not apply to process route 1U (hot rolled, not heat treated, not descaled).

If, by agreement at the time of ordering, the products are to be supplied in a non-heat-treated condition, the

mechanical properties specified in Tables 5 to 9 shall be obtainable from reference test pieces that have

received the appropriate heat treatment (simulated heat treatment).

The values in Tables 10 to 14 apply for the 0,2 %- and 1 %-proof strength at elevated temperatures.

NOTE Austenitic steels are insensitive to brittle fracture in the solution annealed condition. Because they do not have

a pronounced transition temperature, which is characteristic of other steels, they are also useful for application at

cryogenic temperatures.
7.6 Surface quality

The available surface finishes are given in Table 4. Slight surface imperfections, inherent to the production

process, are permitted. Exact requirements concerning maximum depth of acceptable discontinuities for bars,

rods and sections in the relevant conditions are given in Table 1.

Table 1 — Maximum depth of acceptable discontinuities for bars, rods and sections

Conditions Product forms Permissible depth of discontinuities Max. % of delivered weight in excess of

permissible depth of discontinuities

1U, 1C, 1E, 1D Sections To be agreed upon at the time of enquiry and order on the basis of ISO 20723.

1U, 1C, 1E, 1D Rounds and rod To be agreed upon at the time of enquiry and order on the basis of ISO 9443.

1X Rounds - max. 0,2 mm for d ≤ 20 mm 1 %
- max. 0,01 d for 20 < d ≤ 75 mm
- max. 0,75 mm for d > 75 mm
Hexagons - max. 0,3 mm for d ≤ 15 mm 2 %
- max. 0,02 d for 15 < d ≤ 63 mm
Other bars - max. 0,3 mm for d ≤ 15 mm 4 %
- max. 0,02 d for 15 < d ≤ 63 mm
1G Rounds Technically defect free by manufacture. 0,2 %

Depth of discontinuities is understood as being the distance, measured normally to the surface, between the bottom of the

discontinuities and that surface.

At the time of enquiry and order it may be agreed that the product shall be delivered with a surface being technically defect free by

manufacture. In this case, also the maximum % of delivered weight in excess of permissible depth of discontinuities shall be agreed.

For further information see Table 4.
7.7 Internal soundness

For internal soundness, where appropriate, any requirements, together with the conditions for their

verification, may be agreed upon at the time of enquiry and order.
4 © ISO 2012 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/DIS 16143-2
7.8 Dimensions, tolerances on dimensions and shape

The dimensions and the tolerances on dimensions and shape are to be agreed upon at the time of enquiry

and order, as far as possible with reference to the dimensional standards listed in Annex C.

8 Inspection, testing and conformance of products
8.1 General

The manufacturer shall carry out appropriate process control, inspection and testing to assure himself that the

delivery complies with the requirements of the order.
This includes the following:
 a suitable frequency of verification of the dimensions of the products;

 an adequate intensity of visual examination of the surface quality of the products;

 an appropriate frequency and type of test to ensure that the correct grade of steel is delivered.

The nature and frequency of these verifications, examinations and tests are determined by the manufacturer,

based on the degree of consistency that has been determined by the evidence of his quality system. In view of

this, verifications by specific tests for these requirements are not necessary unless otherwise agreed upon.

8.2 Inspection and testing procedures and types of inspection documents

8.2.1 Products complying with this International Standard shall be ordered and delivered with one of the

inspection documents as specified in ISO 10474. The type of document shall be agreed upon at the time of

enquiry and order. If the order does not contain any specification of this type, a test report 2.2 shall be issued.

8.2.2 If, in accordance with the agreements made at the time of enquiry and order, a test report is to be

provided, this shall cover:
a) a statement that the material complies with the requirements of the order;

b) the results of the cast analysis for all elements specified for the type of steel supplied.

8.2.3 If, in accordance with the agreements in the order, an inspection certificate 3.1 or 3.2 is to be

provided, the specific inspections and tests described in 8.3 shall be carried out and their results shall be

certified in the document.
In addition to 8.2.2 the document shall cover

a) the results of the mandatory tests marked in the second column of Table 15 by an “m”;

b) the results of any optional test or inspections agreed upon when ordering marked in the second column of

Table 15 by an “o”.
8.3 Specific inspection and testing
8.3.1 Extent of testing

The tests to be carried out, either mandatorily (m) or by agreement (o) and the composition and size of the

test units, and the number of sample products, samples and test pieces to be taken are given in Table 15.

8.3.2 Selection and preparation of samples and test pieces

8.3.2.1 The general conditions for selection and preparation of samples and test pieces shall be in

accordance with ISO 377 and ISO 14284.
© ISO 2012 – All rights reserved 5
---------------------- Page: 9 ----------------------
ISO/DIS 16143-2

8.3.2.2 The samples for the tensile test shall be taken in accordance with Figures 1 to 3.

The samples shall be taken from products in the as-delivered condition. If agreed, samples from bars may be

taken before straightening. For martensitic and precipitation-hardened grades being delivered in the annealed

condition, a test to demonstrate the capability of further treatment to one of the specified conditions shall be

conducted by the manufacturer on a sample taken from the product in the as-delivered condition and further

treated in accordance with a listed production route. Unless specified in the order, that final condition and

details of conditions of further treatment shall be at the option of the manufacturer.

8.3.2.3 Samples for the hardness test and for the resistance to intergranular corrosion test, where

requested, shall be taken from the same locations as those for the mechanical tests.

8.4 Test methods

8.4.1 Unless otherwise agreed when ordering, the choice of a suitable physical or chemical method of

analysis to determine the product analysis is at the discretion of the manufacturer. In cases of dispute, the

analysis shall be carried out by a laboratory approved by the two parties. In these cases, the reference

method of analysis shall be agreed upon, where possible, with reference to ISO/TR 9769.

8.4.2 The tensile test shall be carried out in accordance with ISO 6892-1 and it shall be performed under

controlled conditions in accordance with clause 5 of ISO 6892-1.

Unless otherwise agreed, the tensile strength and elongation after fracture shall be determined and, in

addition, for ferritic, martensitic, precipitation-hardening, austenitic free-cutting and austenitic-ferritic steels, the

0,2 % proof strength, and for austenitic steels, the 0,2 % and 1 % proof strength.

For bars made of resulfurized grades it may be agreed upon to determine the hardness instead.

If a tensile test at elevated temperature has been ordered, this shall be carried out in accordance with ISO

6892-2. If the proof strength is to be verified, the 0,2 %-proof strength shall be determined, for ferritic,

martensitic, precipitation hardening and austenitic-ferritic steels. In the case of austenitic steels, the 0,2 %-

and the 1 %-proof strength shall be determined.

8.4.3 If an impact test has been ordered, it shall be carried out in accordance with ISO 148-1 on test pieces

with a V-notch and a 2 mm hammer. The average obtained from three test pieces is considered to be the test

result (see also ISO 404).

8.4.4 The Brinell hardness test shall be carried out in accordance with ISO 6506-1.

8.4.5 The resistance to intergranular corrosion shall be tested in accordance with ISO 3651-2, unless

otherwise agreed.

8.4.6 Dimensions and dimensional tolerances of the products shall be tested in accordance with the

requirements of the relevant dimensional standards given in Annex A.
8.5 Retests
See ISO 404.
9 Marking

9.1 The products shall be marked with the manufacturer's trademark or symbol and the steel name or

number. The product shall also be marked with cast number, thickness or dimension as well as an

identification number related to an appropriate inspection certificate.

9.2 Unless otherwise agreed the method of marking and the material of marking shall be at the option of the

manufacturer. Its quality shall be such that it shall be durable for at least one year, can withstand normal

6 © ISO 2012 – All rights reserved
---------------------- Page: 10 ----------------------
ISO/DIS 16143-2

handling and can be stored in unheated storage under cover. Corrosion resistance of the product shall not be

impaired by the marking.
9.3 Each unit shall be marked:

 For semi-finished products, bars and sections by means of labels attached to the bundle or, by

agreement at the time of enquiry and order, by inking, adhesive labels, electrolytic etching or stamping;

 For rods by means of a label attached to the coil.
© ISO 2012 – All rights reserved 7
---------------------- Page: 11 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 16143-2
Table 2 — Chemical composition (cast analysis)
Steel designation % (mass fraction)
Name ISO-number C Si Mn P S Cr Mo Ni N Others
Austenitic steels

X10CrNi18-8 4310-301-00-I 0,05 to 0,15 2,00 2,00 0,045 0,030 16,0 to 19,0 0,80 6,0 to 9,5 0,10 —

8,0 to 10,0
X2CrNi18-9 4307-304-03-I 0,030 1,00 2,00 0,045 0,030 17,5 to 19,5 — 0,10 —
(10,5)

X10CrNiS18-9 4305-303-00-I 0,12 1,00 2,00 0,060 ≥ 0,15 17,0 to 19,0 — 8,0 to 10,0 0,10 Cu:

0,12 to

X2CrNiN18-9 4311-304-53-I 0,030 1,00 2,00 0,045 0,030 17,5 to 19,5 — 8,0 to 10,0 —

0,22
Cu: 3,0 to

X3CrNiCu18-9-4 4567-304-30-I 0,04 1,00 2,00 0,045 0,030 17,0 to 19,0 — 8,0 to 10,5 0,10

4,0
Cu:1,40 to

X6CrNiCuS18-9-2 4570-303-31-I 0,08 1,00 2,00 0,045 ≥ 0,15 17,0 to 19,0 0,60 8,0 to 10,0 0,10

1,80
0,10 to

X5CrNiN19-9 4315-304-51-I 0,07 1,00 2,50 0,045 0,030 18,0 to 20,0 — 8,0 to 11,0 —

0,16

X5CrNi18-10 4301-304-00-I 0,07 1,00 2,00 0,045 0,030 17,5 to 19,5 — 8,0 to 10,5 0,10 —

9,0 to 12,0 Ti: 5  C to
X6CrNiTi18-10 4541-321-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — —
(13,0) 0,70
9,0 to 12,0 Nb: 10  C
X6CrNiNb18-10 4550-347-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — —
(13,0) to 1,00
10,0 to 12,0
X2CrNi19-11 4306-304-03-I 0,030 1,00 2,00 0,045 0,030 18,0 to 20,0 — 0,10 —
(13,0)

X6CrNi18-12 4303-305-00-I 0,08 1,00 2,00 0,045 0,030 17,0 to 19,0 — 10,5 to 13,0 0,10 —

© ISO 2012 – All rights reserved 8
---------------------- Page: 12 ----------------------
ISO/DIS 16143-2
Table 2 (continued)
Steel designation % (mass fraction)
Name ISO-number C Si Mn P S Cr Mo Ni N Others
6,5 to 0,10 to

X8CrMnCuN17-8-3 4597-204-76-I 0,10 2,00 0,040 0,030 15,0 to 18,0 1,00 3,00 Cu: 2,00 to 3,5

9,0 0,30
7,0 to 0,02 to

X3CrMnNiCu15-8-5-3 4615-201-75-E 0,030 1,00 0,040 0,010 14,0 to 16,0 0,80 4,5 to 6,0 Cu: 2,0 to 4,0

9,0 0,06
7,5 to 0,15 to

X12CrMnNiN18-9-5 4373-202-00-I 0,15 1,00 0,060 0,030 17,5 to 19,0 — 4,0 to 6,0 —

10,0 0,30
0,07 to 0,50 to 5,0 to 0,20 to
X11CrNiMnN19-8-6 4369-202-91-I 0,030 0,015 17,5 to 19,5 — 6,5 to 8,5 —
0,15 1,00 7,5 0,30

X1CrNi25-21 4335-310-02-I 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
10,0 to 13,0

X2CrNiMo17-12-2 4404-316-03-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 3,00 0,10 —

(14,5)

X5CrNiMo17-12-2 4401-316-00-I 0,07 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 3,00 10,0 to 13,0 0,10 —

10,5 to 13,5 Ti: 5  C to

X6CrNiMoTi17-12-2 4571-316-35-I 0,08 1,00 2,00 0,045 0,030 16,5 to 18,5 2,00 to 2,50 —

(14,0) 0,70
10,5 to 13,0

X2CrNiMo17-12-3 4432-316-03-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 0,10 —

(14,5)
10,5 to 13,0

X3CrNiMo17-12-3 4436-316-00-I 0,05 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 0,10 —

(14,0)
10,5 to 13,0 0,12 to

X2CrNiMoN17-12-3 4429-316-53-I 0,030 1,00 2,00 0,045 0,030 16,5 to 18,5 2,50 to 3,00 —

(14,0) 0,22

X2CrNiMo18-14-3 4435-316-91-I 0,030 1,00 2,00 0,045 0,015 17,0 to 19,0 2,50 to 3,00 12,5 to 15,0 0,10 —

10,5 to 14,0 0,10 to

X2CrNiMoN18-12-4 4434-317-53-I 0,030 1,00 2,00 0,045 0,030 16,5 to 19,5 3,0 to 4,0 —

(15,0) 0,20
0,12 to

X2CrNiMoN17-13-5 4439-317-26-E 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 —

0,22
0,18 to Cu: 0,50 to

X1CrNiMoCuN20-18-7 4547-312-54-I 0,020 0,70 1,00 0,035 0,015 19,5 to 20,5 6,0 to 7,0 17,5 to 18,5

0,25 1,00
© ISO 2012 – All rights reserved 9
---------------------- Page: 13 ----------------------
ISO/DIS 16143-2
Table 2 (continued)
Steel designation % (mass fraction)
Name ISO-number C Si Mn P S Cr Mo Ni N Others
2,00 to

X1CrNiMoN25-22-2 4466-310-50-E 0,020 0,70 2,00 0,025 0,010 24,0 to 26,0 21,0 to 23,0 0,10 to 0,16 —

2,50
Cu: 1,00 to 2,00

X1CrNiMoCuNW24-22-6 4659-312-66-I 0,020 0,70 2,0 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

X1CrNiMoCuN24-22-8 4652-326-54-I 0,020 0,50 2,0 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 Cu: 0,30 to 0,60

X2CrNiMnMoN25-18-6-5 4565-345-65-I 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/Co as main alloying elements

X1NiCrMoCu25-20-5 4539-089-04-I 0,020 0,75 2,00 0,035 0,015 19,0 to 22,0 4,0 to 5,0 23,5 to 26,0 0,15 Cu: 1,20 to 2,00

Cu: 0,50 t
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.