SVENSK STANDARD SS-EN ISO 683-4:2018

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SVENSK STANDARD SS-EN ISO 683-4:2018

Fastställd/Approved: 2018-06-26 Utgåva/Edition: 1

Språk/Language: engelska/English ICS: 77.140.10; 77.140.20

Stål för värmebehandling, legerade stål och automatstål – Del 4: Automatsstål (ISO 683‑4:2016)

Heat‑treatable steels, alloy steels and free‑cutting steels – Part 4: Free‑cutting steels (ISO 683‑4:2016)

This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80004845

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Standards make the world go round

SIS (Swedish Standards Institute) is an independent non-profit organisation with members from both the private and public sectors. We are part of the European and global network that draws up international standards. Standards consist of documented knowledge developed by prominent actors within the industry, business world and society.

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Användningen av denna produkt regleras av slutanvändarlicensen som återfinns i denna produkt, se standardens sista sidor.

© Copyright SIS, Swedish Standards Institute, Stockholm, Sweden. All rights reserved. The use of this product is governed by the end-user licence for this product. You will find the licence in the end of this document.

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Standarder kan beställas hos SIS som även lämnar allmänna upplysningar om svensk och utländsk standard.

Information about the content of the standard is available from the Swedish Standards Institute (SIS), telephone +46 8 555 520 00. Standards may be ordered from SIS, who can also provide general information about Swedish and foreign standards.

Europastandarden EN ISO 683-4:2018 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 683-4:2018.

Denna standard ersätter SS-EN 10087, utgåva 1

The European Standard EN ISO 683-4:2018 has the status of a Swedish Standard. This document contains the official version of EN ISO 683-4:2018.

This standard supersedes the SS-EN 10087, edition 1

Denna standard är framtagen av kommittén för Konstruktionsstål, SIS/TK 142.

Har du synpunkter på innehållet i den här standarden, vill du delta i ett kommande revideringsarbete eller vara med och ta fram andra standarder inom området? Gå in på www.sis.se - där hittar du mer information.

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN ISO 683-4

June 2018

ICS 77.140.10; 77.140.20 Supersedes EN 10087:1998

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

Heat-treatable steels, alloy steels and free-cutting steels - Part 4: Free-cutting steels (ISO 683-4:2016)

Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 4:

Aciers pour décolletage (ISO 683-4:2016)

Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle - Teil

4: Automatenstähle (ISO 683-4:2016)

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.

English Version

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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.

S t e e l

name 9S20 17SMn20 35SMn20 35SMnPb20

S t e e l

number 1.0721 1.0735 1.0766 1.0767

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

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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

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SS-EN ISO 683-4:2018 (E)

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Heat-treatable steels, alloy steels and free-cutting steels — Part 4:

Free-cutting steels

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

a) not intended for heat treatment, b) suitable for case-hardening, and c) 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

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 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 4885, Ferrous products — 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 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 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

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

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

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.

3.1ruling section

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.

3.2free-cutting steels

steels characterized by good machinability with high metal removal rate, mostly obtained by higher than normal contents of sulphur

Note 1 to entry: Other elements besides sulfur can be added for further improving the machinability.

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. All steels covered by this part of ISO 683 are classified as non-alloy quality steels.

4.2 Designation

For the steel grades covered by this part of ISO 683, 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) the quantity to be delivered;

b) the designation of the product form (e.g. slab, bloom, billet, round bar, wire rod);

c) either the designation of the dimensional standard and the dimensions and tolerances selected from this (see 7.7) or the designation of the drawing or any other document, covering the dimensions and tolerances required for the product;

d) a reference to this part of ISO 683, i.e. ISO 683-4;

e) the designation of the steel grade given in Table 2;

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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 specification of this part of ISO 683 (see 5.1).

a) If a heat-treatment condition other than the untreated condition is required, the symbol for this other condition (see Table 1, column 2).

b) Any supplementary requirement that shall comply with the symbol and, where necessary, the details of this supplementary requirement (see Annex B).

c) Suitability of bars and rod for bright drawing (see 7.6.4).

d) Any requirement relating to removal of surface defects (see 7.6.5).

5.3 Ordering example

EXAMPLE 50 hot-rolled round bars according to ISO 1035-1, with a nominal diameter of 40 mm and a nominal length of 8 000 mm, with diameter tolerance according to class S and with length tolerance according to ISO 1035-4, class L2, made of steel grade ISO 683-4, 35S20 (see Table 2) in the heat-treatment condition +U (see Table 1), product analysis/option (see B.5) with a test report 2.2 in accordance with ISO 10474.

50 round bars ISO 1035 – 40,0S × 8 000L2 steel grade ISO 683-4 – 35S20 option B.5 Inspection document ISO 10474 – 2.2

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 B.6.

6.2 Heat treatment and surface condition at delivery 6.2.1 Normal condition at delivery

Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated condition that means “as hot-worked”.

6.2.2 Particular heat-treatment condition

If so agreed at the time of enquiry and order, the products shall be delivered in one of the particular heat-treatment conditions given in Table 1, rows 3 and 4.

6.3 Traceability of the cast

Each product shall be traceable to the cast (see Clause 10).

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SVENSK STANDARD SS-EN ISO 683-4:2018