ISO/FDIS 16143-4
(Main)Stainless steels for general purposes — Part 4: Bright products
Stainless steels for general purposes — Part 4: Bright products
This document specifies the technical delivery requirements for bright products made of stainless steels in the form of bars in the drawn, peeled/turned or additionally ground condition and they are intended for mechanical purposes, for example for machine parts.
Aciers inoxydables pour usage général — Partie 4: Produits transformés à froid
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DRAFT INTERNATIONAL STANDARD
ISO/DIS 16143-4
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-07-08 2022-09-30
Stainless steels for general purposes —
Part 4:
Bright products
ICS: 77.140.20
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ISO/DIS 16143-4:2022(E)
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ISO/DIS 16143-4:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16143-4
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
Stainless steels for general purposes —
Part 4:
Bright products
ICS: 77.140.20
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NATIONAL REGULATIONS.
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NOTIFICATION OF ANY RELEVANT PATENT
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ii
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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ISO/DIS 16143-4:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 3
4.1 Classification . 3
4.2 Designation . 3
5 Information to be supplied by the purchaser . 3
5.1 Mandatory information . 3
5.2 Options/Supplementary or special requirements . 4
5.3 Example . 4
6 Manufacturing process . 4
6.1 General . 4
6.2 Treatment and surface condition at delivery . 4
6.2.1 Treatment condition . 4
6.2.2 Particular surface conditions . 5
6.3 Traceability of the cast . 5
7 Requirements . 5
7.1 General . 5
7.2 Chemical composition . 5
7.3 Mechanical properties . 5
7.4 Machinability . 5
7.5 Internal soundness . 5
7.6 Shape, dimensions and tolerances . 6
7.7 Surface quality . 6
8 Inspection . 6
8.1 Testing procedures and types of documents. 6
8.2 Frequency of testing . 7
8.3 Specific inspection and testing . 7
8.3.1 Verification of the mechanical properties . 7
8.3.2 Visual and dimensional inspection . 7
9 Test methods . 7
9.1 Chemical analysis . 7
9.2 Mechanical tests . 8
9.2.1 Tensile test and hardness test . 8
9.2.2 Impact test . 8
9.3 Verification of dimensions . 8
9.4 Retests . 8
10 Marking . . 8
Annex A (informative) Steel grades and chemical composition according to ISO 16143-2 .23
Annex B (normative) Ruling sections for mechanical properties .26
Annex C (normative) Supplementary or special requirements .30
Annex D (normative) Methods for evaluating straightness.32
Annex E (informative) Designation of steels given in this document and of comparable
grades covered in various designation systems .33
Bibliography .35
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ISO/DIS 16143-4:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Heat
treatable and alloy steels.
This edition cancels and replaces the third edition (ISO 683-18:2014), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Standard was split into two parts: ISO 683-6 for non-alloy and alloy steels and ISO 16143-4 for
stainless steels.
A list of all parts in the ISO 16143 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO/DIS 16143-4:2022(E)
Introduction
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this document may involve the use of a patent.
ISO takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured ISO that he/she is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In
this respect, the statement of the holder of this patent right is registered with ISO. Information may be
obtained from the patent database available at www.iso.org/patents.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those in the patent database. ISO shall not be held responsible for identifying
any or all such patent rights.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 16143-4:2022(E)
Stainless steels for general purposes —
Part 4:
Bright products
1 Scope
This document specifies the technical delivery requirements for bright products made of stainless
steels in the form of bars in the drawn, peeled/turned or additionally ground condition and they are
intended for mechanical purposes, for example for machine parts.
NOTE 1 Bright steel products made of corrosion-resistant stainless steel are manufactured from steels
mentioned in ISO 16143-2, and bright steel products intended for high-temperature purposes are manufactured
from steels mentioned in ISO 4955.
NOTE 2 Further steel grades are suitable for manufacturing bright products listed in other standards, e. g.
ISO 15510. They can also be used, but in this case the mechanical properties have to be agreed at the time of
enquiry and order.
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.
ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 286-2, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes —
Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
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 4885, Ferrous materials — Heat treatments — Vocabulary
ISO 4948-1, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based
on chemical composition
ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main
quality classes and main property or application characteristics
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 6929, Steel products — Vocabulary
ISO/TR 9769, Steel and iron — Review of available methods of analysis
ISO 10474, Steel and steel products — Inspection documents
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ISO/DIS 16143-4:2022(E)
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition
ISO 15510, Stainless steels — Chemical composition
ISO 16143-2, Stainless steels for general purposes — Part 2: Corrosion-resistant semi-finished products,
bars, rods and sections
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 377, ISO 4885, ISO 4948-1,
ISO 4948-2, ISO 6929, ISO 14284 and the following apply.
ISO and IEC maintain terminological 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
bright products
are drawn or peeled/turned bars with smoother surface quality and better dimensional accuracy in
comparison to hot-rolled bars
3.2
drawn products
products of various cross-sectional shapes obtained, after descaling, by cold drawing of hot-rolled bars
or rod, on a drawing bench (cold formation without removing material)
Note 1 to entry: This operation gives the product special features with respect to shape, dimensional accuracy
and surface finish. Products in lengths are delivered straightened, products of small cross-section may also be
supplied in coils.
3.3
peeled/turned products
round bars produced by peeling or turning where the product can be further processed by straightening
and polishing
Note 1 to entry: This operation gives the bar special features with respect to shape, dimensional accuracy and
surface finish. The removal of metal is carried out in such a way that the bright product is generally free from
rolling defects and surface decarburization
3.4
ground products
drawn or peeled/turned round bars given an improved surface quality and dimensional accuracy by
grinding or by grinding and polishing
3.5
thickness
nominal dimension of the product
Note 1 to entry: That means:
a) the diameter in the case of rounds;
b) the lateral length in the case of squares;
c) the width over flats in the case of hexagons;
d) the shorter lateral length in the case of flats (rectangular bars) and wide-flats.
For special sections, 'thickness' has to be defined at the time of enquiry and order.
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ISO/DIS 16143-4:2022(E)
3.6
out-of round
difference between the smallest and largest dimension measured across the pairs of opposing points at
a common cross-section
3.7
ruling section
that section for which the specified mechanical properties shall apply
Note 1 to entry: Independent of the actual shape and dimensions of the cross-section of the product, the size of its
ruling section is always given by a diameter. This corresponds to the diameter of an “equivalent round bar”. That
is a round bar which will show the same cooling rate as the actual ruling section of the product concerned at its
position for taking the test pieces, when being cooled from austenitizing temperature.
4 Classification and designation
4.1 Classification
The classification of the relevant steel grades is allocated in accordance with ISO 4948-1 and ISO 4948-2.
Stainless steels covered by this document are further classified according to their structure into
— austenitic steels,
— austenitic-ferritic steels,
— ferritic steels,
— martensitic steels, or
— precipitation-hardening steels.
4.2 Designation
For the steel grades covered by this document, the steel names given in the relevant tables are allocated
in accordance with ISO/TS 4949.
5 Information to be supplied by the purchaser
5.1 Mandatory information
The manufacturer shall obtain the following information from the purchaser at the time of enquiry and
order:
a) quantity (mass, number of bars) to be delivered;
b) shape of the product (e.g. round, hexagon, square, flat);
c) the dimensions and tolerances of the product, see 7.6 and Tables 2 and 8 to 10;
d) reference to this document, i.e. ISO 16143-4;
e) the designation of the steel grade;
f) if for the relevant steel more than one heat treatment condition is possible (for the martensitic and
precipitation hardening steels of Table 6), the symbol for the desired heat treatment conditions;
g) the desired condition (see symbols in Table 1) for steel grades ordered according to Tables 4 to 6 or
the cold worked hardened condition for steel grades ordered according to Table 7;
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ISO/DIS 16143-4:2022(E)
h) standard designation for a test report 2.2 or, if required, any other type of inspection document in
accordance with ISO 10474.
5.2 Options/Supplementary or special requirements
A number of options are specified in this document and listed below. If the purchaser does not indicate
the wish to implement any of these options, the products will be supplied in accordance with the basic
specifications of this document (see 5.1).
a) Reference testing for products used in the quenched and tempered condition, only for martensitic
and precipitation hardening steels ordered in the annealed condition, see 8.3.1 and C.2);
b) non-destructive testing (see 7.5 and C.3);
c) the disposition of tolerances in accordance with 7.6 and C.4;
d) bar end conditions may be specified at the time of enquiry and order in accordance with C.5;
e) product analysis (see 7.2, Table 12 and C.6);
f) any requirement to special marking (see Clauses 10 and C.7)
g) any additionally requirement concerning the surface condition, i.e. ground surface +G or polished
surface +PL for round bars (see 6.2.2 and Table 2);
h) surface quality class if another than the standard class is requested (see 7.7 and Table 3);
i) verification of the straightness (see 7.6, Table 11 and Annex D);
j) impact test at a temperature lower than room temperature (see 9.2.2).
5.3 Example
3 t round bars with nominal diameter 80 mm, tolerance h8, stock length 6 000 mm made of steel grade
X5CrNi18–10 according to this standard in process route +2B, surface quality class 3, with surface
condition +2G and a certificate 3.1 as specified in ISO 10474.
3 t round bars 80 h8 × stock 6 000
steel grade ISO 16143-4 - X5CrNi18–10+2B+2G
Inspection certificate ISO 10474 - 3.1
6 Manufacturing process
6.1 General
The manufacturing process of the steel and of the products is with the restrictions given by the
requirements in 6.2 and 6.3 left to the discretion of the manufacturer.
6.2 Treatment and surface condition at delivery
6.2.1 Treatment condition
The treatment and heat-treatment condition (if any) at the time of delivery must comply with the
condition agreed in the order and shall be one of the conditions indicated in Table 1.
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ISO/DIS 16143-4:2022(E)
6.2.2 Particular surface conditions
Table 2 shows the possible surface conditions and tolerance classes according to ISO 286-2 at delivery.
6.3 Traceability of the cast
Each product shall be traceable to the cast, see Clause 10.
7 Requirements
7.1 General
Combination of usual treatment conditions at the time of delivery and requirements concerning
chemical composition and mechanical properties are shown in Table 1.
In addition to this document, the general technical delivery requirements of ISO 404 are applicable.
7.2 Chemical composition
The chemical composition of the steels determined by the cast analysis, shall comply to ISO 16143-2. The
grades and the chemical composition of the steels are listed for information in Annex A for ISO 16143-2.
Permissible deviations between the limiting values for cast analysis and the values for product analysis
are given in the corresponding table of ISO 16143-2. The product analysis shall be carried out when
specified at the time of enquiry and order (see C.6).
7.3 Mechanical properties
For steels ordered in one of the treatment conditions in Table 1, the requirements for mechanical
properties specified in Tables 4 to 6 apply (except for stainless steel bars ordered in condition +2D for
which the mechanical properties are to be found in ISO 16143-2). The mechanical property values given
in Tables 4 to 6 apply to test pieces which have been taken and prepared in accordance with Figure 1.
For stainless steel bars which are intentionally cold work hardened in order to increase their 0,2-proof
strength to a specific level, the mechanical properties at room temperature as specified in Table 7 apply.
For these products, the mechanical properties are prime, with the condition a secondary property.
An impact test is to be performed for peeled/turned bars if mentioned in the tables of mechanical
properties. For cold drawn bars an impact test is not to be performed, since there are no reference
values unless impact test and Charpy values are agreed at the time of enquiry and order. Additional
requirements concerning the impact energy and the verification at temperatures other than room
temperature (0 °C, –20 °C and –40 °C) can be agreed at the time of enquiry and order.
NOTE In this Tables 4 to 7, grades alloyed with further elements for better machinability are not explicitly
mentioned, but the mechanical properties are also valid for them (see Table A.1).
7.4 Machinability
If improved machinability is required grades with defined ranges of alloying elements, which support
the machinability should be ordered.
7.5 Internal soundness
Where appropriate, requirements relating to the internal soundness of the products shall be agreed at
the time of enquiry and order (see C.3).
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ISO/DIS 16143-4:2022(E)
7.6 Shape, dimensions and tolerances
The tolerance class on thickness (and width for flats) shall comply with the requirements agreed at
the time of enquiry and order and shall be in accordance with Table 2. If there is no agreement on the
tolerance class the bright products are delivered with the standard tolerance class given in Table 2. The
tolerance class and the corresponding tolerances are given in Table 8 for rounds, squares and hexagons
and in Table 9 for drawn flats. Where specified by the purchaser at the time of enquiry and order the
disposition tolerances specified in Table 8 shall be in accordance with C.4.
Unless otherwise agreed at the time of enquiry and order, the length and the tolerance on length shall
be as specified in Table 10.
Maximum deviation from 'out of roundness' shall be not more than half the specified tolerance range in
any case never above the upper limit of the tolerance.
Where specified at the time of enquiry and order and in cases of dispute, an agreed number of bars
shall be evaluated for straightness in accordance with one of the methods specified in Annex D and the
tolerances specified in Table 11 shall apply.
Non-round bars (i.e. square, hexagon and flat) in widths ≤ 150 mm may have an undefined profile within
a distance of 0,2 mm of the hypothetical edge, flats in widths > 150 mm within a distance of 0,5 mm,
unless otherwise agreed. For widths > 150 mm sharp corners can specifically been ordered.
7.7 Surface quality
Bright products shall have a smooth, scale free surface. Bright products in the final heat treated
condition shall be free from loose surface scale; their surface might be discoloured or darker. For
hexagons, squares, flats and profiles with special cross-sections, one cannot achieve – for manufacturing
reasons – the same quality of surface finish as for round cross-sections.
Since surface discontinuities (cracks, overlapping, scale, isolated pores, pits, grooves, etc.) cannot be
completely avoided during manufacturing (hot and cold forming, heat treatments, handling and storage)
and since they are reta
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