ISO/FDIS 683-7
(Main)Heat-treatable steels, alloy steels and free-cutting steels — Part 7: Bright products of non-alloy and alloy steels
Heat-treatable steels, alloy steels and free-cutting steels — Part 7: Bright products of non-alloy and alloy steels
This document specifies the technical delivery requirements for bright steel products in the drawn, peeled/turned or additional ground condition and they are intended for mechanical purposes, for example for machine parts. The bright steel products are subdivided into the following steel types: a) non-alloy general engineering steels; b) non-alloy free-cutting steels; c) non-alloy and alloy case-hardening steels; d) non-alloy and alloy steels for quenching and tempering.
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage — Partie 7: Produits en aciers non alliés et alliés transformés à froid
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DRAFT INTERNATIONAL STANDARD
ISO/DIS 683-7
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-07-08 2022-09-30
Heat-treatable steels, alloy steels and free-cutting steels —
Part 7:
Bright products of non-alloy and alloy steels
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage —
Partie 7: Produits en aciers non alliés et alliés transformés à froid
ICS: 77.140.45; 77.140.10; 77.140.20
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ISO/DIS 683-7:2022(E)
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ISO/DIS 683-7:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 683-7
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
Heat-treatable steels, alloy steels and free-cutting steels —
Part 7:
Bright products of non-alloy and alloy steels
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage —
Partie 7: Produits en aciers non alliés et alliés transformés à froid
ICS: 77.140.45; 77.140.10; 77.140.20
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ii
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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ISO/DIS 683-7:2022(E)
Contents Page
Foreword .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 . 5
6.1 General . 5
6.2 Treatment and surface condition at delivery . 5
6.2.1 Treatment condition . 5
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 . 6
7.4 Hardenability . 6
7.5 Machinability . 6
7.6 Grain size . 6
7.7 Non-metallic inclusions . 7
7.7.1 Microscopic inclusions . 7
7.7.2 Macroscopic inclusions . 7
7.8 Internal soundness . 7
7.9 Decarburization . . 7
7.10 Shape, dimensions and tolerances . 7
7.11 Surface quality . 8
8 Inspection . 8
8.1 Testing procedures and types of documents. 8
8.2 Frequency of testing . 8
8.3 Specific inspection and testing . 9
8.3.1 Verification of the hardenability, hardness and mechanical properties . 9
8.3.2 Visual and dimensional inspection . 9
9 Test methods . 9
9.1 Chemical analysis . 9
9.2 Mechanical tests . 9
9.2.1 Tensile test . 9
9.2.2 Impact test . 9
9.3 Hardness and hardenability tests . 9
9.3.1 Hardness in treatment conditions +A and +FP . 9
9.3.2 Verification of hardenability . 10
9.4 Verification of dimensions . 10
9.5 Retests . 10
10 Marking . .10
Annex A (informative) Steel grades and chemical composition according to ISO 630-2,
ISO 683-1, ISO 683-2, ISO 683-3 and ISO 683-4 .32
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ISO/DIS 683-7:2022(E)
Annex B (normative) Ruling sections for mechanical properties .37
Annex C (normative) Supplementary or special requirements .40
Annex D (normative) Methods for evaluating straightness.42
Annex E (informative) Designation of steels given in this document and of comparable
grades covered in various designation systems .43
Bibliography .46
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ISO/DIS 683-7:2022(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 683 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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DRAFT INTERNATIONAL STANDARD ISO/DIS 683-7:2022(E)
Heat-treatable steels, alloy steels and free-cutting steels —
Part 7:
Bright products of non-alloy and alloy steels
1 Scope
This document specifies the technical delivery requirements for bright steel products in the drawn,
peeled/turned or additional ground condition and they are intended for mechanical purposes, for
example for machine parts. The bright steel products are subdivided into the following steel types:
a) non-alloy general engineering steels;
b) non-alloy free-cutting steels;
c) non-alloy and alloy case-hardening steels;
d) non-alloy and alloy steels for quenching and tempering;
This document lists the mechanical characteristics for products up to 100 mm in thickness. For larger
dimensions, the manufacturer and purchaser agree on mechanical properties at the time of enquiry
and order.
Bright products of stainless steels are not part of this standard, they are covered by ISO 16143-4.
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 643, Steels — Micrographic determination of the apparent grain size
ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general
purposes
ISO 683-1, Heat-treatable steels, alloy steels and free-cutting steels — Part 1: Non-alloy steels for quenching
and tempering·
ISO 683-2, Heat-treatable steels, alloy steels and free-cutting steels — Part 2: Alloy steels for quenching and
tempering
ISO 683-3, Heat-treatable steels, alloy steels and free-cutting steels — Part 3: Case-hardening steels
ISO 683-4, Heat-treatable steels, alloy steels and free-cutting steels — Part 4: Free-cutting steels
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ISO/DIS 683-7:2022(E)
ISO 3887, Steels — Determination of the depth of decarburization
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 4967, Steel — Determination of content of non-metallic inclusions — Micrographic method using
standard diagrams
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
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition
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. In addition the process causes cold working of the product, which can be eliminated by
subsequent heat treatment .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
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ISO/DIS 683-7:2022(E)
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.
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.
The general engineering and the free cutting steels are quality steels. The steels for case hardening and
for quenching and tempering are special 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 7.10 and Tables 2 and 11 to 13;
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ISO/DIS 683-7:2022(E)
d) reference to this part of ISO 683, i.e ISO 683-6;
e) the designation of the steel grade and the delivery condition (see Tables 4 to 10);
f) 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 part of ISO 683 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 part of ISO 683 (see 5.1).
a) Reference testing for products used in the quenched and tempered condition (for steels for
quenching and tempering only, see Table 1, footnote d and C.2);
b) any fine grain requirement and verification of fine grain size (see 7.6 and C.3);
c) non-destructive testing (see 7.8 and C.4);
d) the disposition of tolerances in accordance with 7.10 and C.5;
e) bar end conditions may be specified at the time of enquiry and order in accordance with C.6;
f) product analysis (see 7.2, Table 15 and C.7);
g) for a minimum reduction ratio or minimum thickness deformation (see 6.1 and C.8)
h) temporary corrosion protection (see 6.2.1 and C.9);
i) any requirement to special marking (see Clauses 10 and C.10)
j) 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);
k) surface quality class if another than the standard class is requested (see 7.11 and Table 3);
l) verification of the straightness (see 7.10, Table 14, Table 15 and Annex D);
m) any requirement to the hardenability (+H, +HH, +HL), for special steels only (see 7.4);
n) any requirement for non-metallic inclusions (see 7.7);
o) any requirement regarding the permissible depth of decarburization (see 7.9);
p) impact test at a temperature lower than room temperature (see 9.2.2).
5.3 Example
2 t round bars with nominal diameter 20 mm, tolerance h9, stock length 6 000 mm made of steel grade
C45 according to this standard in delivery condition +C, surface quality class 1 and a test report 2.2 as
specified in ISO 10474.
2 t round bars 20 h9 × stock 6 000
steel grade ISO 683-6 - C45+C
Inspection document ISO 10474 - 2.2
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ISO/DIS 683-7:2022(E)
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.
For minimum reduction ratio or minimum thickness deformation ratio of rolled and forged products,
see C.8.
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.
Bright steel products in cold drawn or peeled/turned condition are coated with a light film of grease
from processing, for bright steel products in a finally heat treated condition the manufacturer chooses
the rust protection after heat treatment.
The usual light application of ordinary grease or oil does not afford positive protection against rusting,
particularly in the presence of condensation water. The use of a selected rust inhibitor or a special type
of packing shall, if required, be agreed at the time of enquiry and order, see C.9.
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 part of ISO 683, 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 630-2,
ISO 683-1, ISO 683-2, ISO 683-3 and ISO 683-4. The grades and the chemical composition of the steels
are listed for information in Annex A for ISO 630-2, ISO 683-1, ISO 683-2, ISO 683-3 and ISO 683-4.
Permissible deviations between the limiting values for cast analysis and the values for product analysis
are given in the corresponding tables of ISO 630-2, ISO 683-1, ISO 683-2, ISO 683-3 and ISO 683-4. The
product analysis shall be carried out when specified at the time of enquiry and order (see C.7).
If steels for case hardening or for quenching and tempering are ordered with hardenability requirements
according to ISO 683-1, ISO 683-2 and ISO 683-3, such hardenability requirements shall be considered
as the governing criteria for acceptance. In such cases, the cast analysis may deviate by the values given
in ISO 683-1, ISO 683-2 and ISO 683-3, Table 3, footnote a.
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ISO/DIS 683-7:2022(E)
WARNING — Due to hazardous effects to health and environmental problems of Pb, it is
recommended to use instead steels only with sulfur and other innocuous free-cutting element
additions.
7.3 Mechanical properties
For steels ordered in one of the treatment condition in Table 1, the requirements for mechanical
properties specified in Tables 4 to 10 apply. The mechanical property values given in Tables 4 to 10
apply to test pieces which have been taken and prepared in accordance with Figure 1.
In this case, the normal and narrowed hardenability values given in ISO 683-1, ISO 683-2 for special
steels and the narrowed hardenability values in ISO 683-3 for alloy special steels are for guidance
purposes only.
An impact test is to be performed if mentioned in the
...
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