EN 10083-1:2006

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EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10083-1August 2006ICS 77.140.10Supersedes EN 10083-1:1991 + A1:1996
English VersionSteels for quenching and tempering - Part 1: General technicaldelivery conditionsAciers pour trempe et revenu - Partie 1: Conditionstechniques générales de livraisonVergütungsstähle - Teil 1: Allgemeine technischeLieferbedingungenThis European Standard was approved by CEN on 7 July 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10083-1:2006: E

Ruling sections for the mechanical properties.18 Annex B (normative)
Options.20 Annex C (informative)
Other relevant standards.22 Annex D (informative)
Dimensional standards applicable to products complying with this European Standard.23 Annex E (informative)
Determining the non-metallic inclusion content.24

Foreword This document (EN 10083-1:2006) has been prepared by Technical Committee ECISS/TC 23 “Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimensions”, 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 February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. Together with Part 2 and Part 3 of this standard, this Part 1 is a revision of the following European Standards: EN 10083-1:1991 + A1:1996, Quenched and tempered steels — Part 1: Technical delivery conditions for special steels EN 10083-2:1991 + A1:1996, Quenched and tempered steels — Part 2: Technical delivery conditions for unalloyed quality steels EN 10083-3:1995, Quenched and tempered steels — Part 3: Technical delivery conditions for boron steels and of EURONORM 86:1970, Steels for flame and induction hardening — Quality specifications The specific requirements for steels for quenching and tempering are given in the following parts: Part 2: Technical delivery conditions for non alloy steels Part 3: Technical delivery conditions for alloy steels According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

> 0,30 % only);  limited oxide inclusion content;  lower maximum contents for phosphorus and sulphur. NOTE 5 This European Standard does not apply for bright steel products. For bright steel products
EN 10277-1 and EN 10277-5 apply. In special cases, variations in these technical delivery requirements or additions to them may be agreed at the time of enquiry and order (see Annex B). In addition to the specifications of this European Standard, the general technical delivery conditions given in EN 10021 are applicable unless otherwise specified.

EN 10083-3. 4.2 Designation 4.2.1 Steel names For the steel grades covered by this European Standard, the steel names as given in the relevant tables of EN 10083-2 and EN 10083-3 shall be allocated in accordance with EN 10027-1. 4.2.2 Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in the relevant tables of EN 10083-2 and EN 10083-3 shall be allocated in accordance with EN 10027-2.

EN 10083-2:2006 or EN 10083-3:2006 respectively. 7.1.1.2 Permissible deviations between the limiting values for cast analysis and the values for product analysis are given in Tables 4 of EN 10083-2:2006 and EN 10083-3:2006 respectively. The product analysis shall be carried out when specified at the time of the order (see B.6). 7.1.2 Hardenability Where the steel is ordered by using the symbols for normal (+H) or restricted (+HL, +HH) hardenability requirements, the hardenability values given in the relevant tables of EN 10083-2 and
EN 10083-3 shall apply. 7.1.3 Mechanical properties Where the steel is ordered without hardenability requirements, the requirements for mechanical properties specified in EN 10083-2 and EN 10083-3 apply as appropriate for the particular heat treatment condition. The mechanical property values given in EN 10083-2 and EN 10083-3 apply to test pieces in the quenched and tempered or normalized condition which have been taken and prepared in accordance with Figure 1 or Figures 2 and 3. 7.2 Machinability All steels delivered in the soft annealed (+A) condition are machinable. Where improved machinability is required, the grades with a specified sulphur range should be ordered and/or with a specific treatment to improve machinability (e.g. Ca treatment). 7.3 Shearability of semi-finished products and bars The relevant specifications in EN 10083-2 and EN 10083-3 shall apply. 7.4 Structure The requirements specified in the relevant clauses of EN 10083-2 and EN 10083-3 shall apply. Regarding fine grain requirements and/or verification of fine grain size see B.3. Regarding the verification of non-metallic inclusion content of special steels see B.4. NOTE Segregation is the result of a natural phenomenon. Segregations can be found in ingots as well as in slabs, blooms and billets from the continuous casting process. The positive segregation is a concentration of various elements at different locations in the ingot, slab, bloom and billet. In case of flat products customers should note, that these segregations can occur parallel to the surface of the product. Especially for medium and high carbon contents segregations lead to a higher hardness and should be taken into consideration during further heat treatments.
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