National foreword

This British Standard is the UK implementation of EN ISO 683‑4:2018. It is identical to ISO 683‑4:2016. It supersedes BS EN 10087:1999, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee ISE/105, Steels for Heat Treatment, Alloy Steels, Free-Cutting Steels and Stainless Steels.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.

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 World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

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 683‑4:2014), of which it constitutes a minor revision.

ISO 683 consists of the following parts, under the general title Heat-treatable steels, alloy steels and free-cutting steels:

Part 1: Non-alloy steels for quenching and tempering
Part 2: Alloy steels for quenching and tempering
Part 3: Case-hardening steels
Part 4: Free-cutting steels
Part 5: Nitriding steels
Part 14: Hot-rolled steels for quenched and tempered springs
Part 15: Valve steels for internal combustion engines
Part 17: Ball and roller bearing steels
Part 18: Bright steel products

This European Standard was approved by CEN on 18 May 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

The text of ISO 683‑4:2016 has been prepared by Technical Committee ISO/TC 17 “Steel” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 683‑4:2018 by Technical Committee ECISS/TC 105 “Steels for heat treatment, alloy steels, free-cutting steels and stainless steels” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2018, and conflicting national standards shall be withdrawn at the latest by December 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 10087:1998.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 683‑4:2016 has been approved by CEN as EN ISO 683‑4:2018 without any modification.

The European steel numbers to the steel grades are to be found in informative Annex C. Some European steel numbers were not available at the publication of this International standard, for this reason they are given now below.

The references to following European standards are given for information:

EN 10017, Steels rod for drawing and/or cold rolling – Dimensions and tolerances

EN 10021, General technical delivery conditions for steel products

EN 10058, Hot rolled flat steel bars for general purposes – Dimensions and tolerances on shape and dimensions

EN 10059, Hot rolled square steel bars for general purposes – Dimensions and tolerances on shape and dimensions

EN 10060, Hot rolled round steel bars - Dimensions and tolerances on shape and dimensions

EN 10061, Hot rolled hexagon steel bars – Dimensions and tolerances on shape and dimensions

EN 10204, Metallic products – Types of inspection documents

EN 10308, Non-destructive testing – Ultrasonic testing of steel bars

1 Scope

This part of ISO 683 gives the technical delivery requirements for semi-finished products (e.g. blooms, billets, slabs), bars and wire rod, manufactured from the free-cutting steels listed in Table 2 and supplied in one of the treatment conditions given for the different types of products in Table 1, rows 2 to 4.

This part of ISO 683 covers three groups of free-cutting steels for mechanical purposes as listed in Table 2, namely

not intended for heat treatment,
suitable for case-hardening, and
suitable for quenching and tempering.

Free-cutting steels are often used as bright bars. For these products, refer to ISO 683‑18.

In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B).

In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.

2 Normative references

3 Terms and definitions

4 Classification and designation

4.1 Classification

4.2 Designation

5 Information to be supplied by the purchaser

5.1 Mandatory information

5.2 Options/supplementary or special requirements

5.3 Ordering example

6 Manufacturing process

6.1 General

6.2 Heat treatment and surface condition at delivery

6.3 Traceability of the cast

7 Requirements

7.1 Chemical composition, hardness, and mechanical properties

7.2 Machinability

7.3 Weldability

7.4 Grain size

7.5 Internal soundness

7.6 Surface quality

7.7 Shape, dimensions, and tolerances

8 Inspection

8.1 Testing procedures and types of documents

8.2 Frequency of testing

8.3 Specific inspection and testing

9 Test methods

9.1 Chemical analysis

9.2 Hardness and mechanical tests

9.3 Retests

10 Marking

Bibliography

BS EN ISO 683-4:2018

Heat-treatable steels, alloy steels and free-cutting steels - Free-cutting steels

Current, Under Review

Published:

31 Jul 2018