SIST 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



EN 10083-1:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.5 3 Terms and definitions.6 4 Classification and designation.6 4.1 Classification.6 4.2 Designation.6 5 Information to be supplied by the purchaser.7 5.1 Mandatory information.7 5.2 Options.7 6 Manufacturing process.8 6.1 General.8 6.2 De-oxidation.8 6.3 Heat treatment and surface condition at delivery.8 6.4 Cast separation.8 7 Requirements.9 7.1 Chemical composition, hardenability and mechanical properties.9 7.2 Machinability.9 7.3 Shearability of semi-finished products and bars.9 7.4 Structure.9 7.5 Internal soundness.10 7.6 Surface quality.10 7.7 Dimensions, tolerances on dimensions and shape.10 8 Inspection.10 8.1 Testing procedures and types of documents.10 8.2 Frequency of testing.11 8.3 Tests to be carried out for specific inspection.11 9 Preparation of samples and test pieces.12 9.1 Selection and preparation of samples for chemical analysis.12 9.2 Location and orientation of samples and test pieces for mechanical tests.12 9.3 Location and preparation of samples for hardness and hardenability tests.12 9.4 Identification of samples and test pieces.12 10 Test methods.13 10.1 Chemical analysis.13 10.2 Mechanical tests.13 10.3 Hardness and hardenability tests.13 10.4 Retests.14 11 Marking, labelling, packaging.14 Annex A (normative)
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



EN 10083-1:2006 (E) 3
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.



EN 10083-1:2006 (E) 4 1 Scope This part of EN 10083 specifies the general technical delivery requirements for  semi-finished products, hot formed, e.g. blooms, billets, slabs (see NOTES 2 and 3),  bars (see NOTE 2),  rod,  wide flats,  hot-rolled strip and sheet/plate,  forgings (see NOTE 2) manufactured from the direct hardening non alloy steels for quenching and tempering (see EN 10083-2), the direct hardening alloy steels for quenching and tempering (see EN 10083-3), the non alloy flame and induction hardening steels (see EN 10083-2) and the alloy flame and induction hardening steels (see EN 10083-3), and supplied in one of the heat treatment conditions given for the different types of products in the relevant tables of EN 10083-2 and EN 10083-3 and in one of the surface conditions given in the relevant tables of EN 10083-2 and EN 10083-3. The steels are generally intended for the manufacture of quenched and tempered, flame or induction hardened machine parts, but can also be used in the normalized condition (see EN 10083-2). Where applicable, the requirements for mechanical properties given in EN 10083-2 and EN 10083-3 are restricted to the relevant tables in these documents. NOTE 1 European Standards on similar grades are listed in Annex C. NOTE 2 Hammer forged semi-finished products (blooms, billets, slabs etc.), seamless rolled rings and hammer forged bars are in the following covered under semi-finished products or bars and not under the term "forgings". NOTE 3 Special agreements should be made when ordering un-worked continuously cast semi-finished products. NOTE 4 In accordance with EN 10020, the steels covered by EN 10083-2:2006 are quality and special steels, the steels covered by EN 10083-3:2006 are special steels. The differences between quality and special steels are characterized by the following requirements, which are valid for special steels only:  the minimum impact values in the quenched and tempered condition (for non alloy special steels in the case of mean percentages by mass of carbon < 0,50 % only);  limiting hardenability values in the Jominy test (for non alloy steels in the case of percentages by mass of carbon
> 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 10083-1:2006 (E) 5 2 Normative references The following referenced documents are indispensable for the application 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. EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature EN 10020:2000, Definition and classification of grades of steel EN 10021, General technical delivery requirements for steel and iron products EN 10027-1, Designation systems for steels — Part 1: Steel names EN 10027-2, Designation systems for steels — Part 2: Numerical system EN 10045-1, Metallic materials — Charpy impact test — Part 1: Test method EN 10052:1993, Vocabulary of heat treatment terms for ferrous products EN 10079:1992, Definition of steel products EN 10083-2:2006, Steels for quenching and tempering — Part 2: Technical delivery conditions for non alloy steels EN 10083-3:2006, Steels for quenching and tempering — Part 3: Technical delivery conditions for alloy steels EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method) EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 2: Plates and wide flats EN 10204, Metallic products — Types of inspection documents EN 10221, Surface quality classes for hot-rolled bars and rods — Technical delivery conditions CR 10261, ECISS Information Circular 11 — Iron and steel — Review of available methods of chemical analysis EN 10308, Non destructive testing — Ultrasonic testing of steel bars EN ISO 377:1997, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 642, Steel — Hardenability test by end quenching (Jominy test) (ISO 642:1999) EN ISO 643, Steels — Micrographic determination of the apparent grain size (ISO 643:2003) EN ISO 3887, Steels — Determination of depth of decarburization (ISO 3887:2003) EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005) EN ISO 6508-1:2005, Metallic materials — Rockwell hardness test— Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-1:2005) EN ISO 14284:2002, Steel and iron — Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996)



EN 10083-1:2006 (E) 6 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10052:1993, EN 10079:1992, EN ISO 377:1997, EN ISO 14284:2002 and the following apply. 3.1 flame and induction hardening steels flame and induction hardening steels are characterized by the fact that, when in the usual quenched and tempered condition, they are capable of being surface hardened by local heating and quenching without any appreciable impairment of the strength and toughness properties of the core 3.2 quenched and tempered steels quenched and tempered steels are engineering steels which because of their chemical composition are suitable for hardening and in the quenched and tempered condition have good toughness at a given tensile strength 3.3 ruling section section for which the specified mechanical properties apply (see Annex A). 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, at the position of its cross-section specified for taking the test pieces for the mechanical tests, will, when being cooled from austenitizing temperature, show the same cooling rate as the actual ruling section of the product concerned at its position for taking the test pieces 4 Classification and designation 4.1 Classification The classification of the relevant steel grades according to EN 10020 is indicated in EN 10083-2 and
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 10083-1:2006 (E) 7 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. round bar, rod, sheet or forging); c) the number of the dimensional standard (e.g. EN 10060); d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances; e) the number of this European Standard including the number of the relevant part; f) steel name or steel number (see 4.2, EN 10083-2 and EN 10083-3); g) the type of inspection document in accordance with EN 10204 (see 8.1). 5.2 Options A number of options are specified in this European Standard and listed below. If the purchaser does not indicate his wish to implement any of these options, the supplier shall act in accordance with the basic specification of this European Standard (see 5.1): a) any particular heat treatment condition (see 6.3.2); b) any particular surface condition (see 6.3.3); c) any verification of the product analysis (see 7.1.1.2 and B.6); d) any requirement to the hardenability (+H, +HH, +HL) for special steels (see 7.1.2) and if agreed the information about calculation of the hardenability (see 10.3.2); e) any verification of mechanical properties of reference test pieces in the quenched and tempered (+QT) or normalized (+N) condition (see B.1 and B.2); f) any fine grain requirements or verification of fine grain size (see 7.4 and B.3); g) any requirements for the verification of non-metallic inclusion content of special steels (see 7.4 and B.4); h) any requirement for internal soundness (see 7.5 and B.5); i) any requirement relating to surface quality (see 7.6.3); j) any requirement regarding the permissible depth of decarburization (see 7.6.4); k) suitability of bars and rod for bright drawing (see 7.6.5); l) any requirement relating to removal of surface defects (see 7.6.6); m) inspection of surface condition and dimensions shall be carried out by the purchaser at the manufacturer's works (see 8.1.4);



EN 10083-1:2006 (E) 8 n) any requirement concerning special marking of the products (see Clause 11 and B.7). EXAMPLE 20 round bars with the nominal diameter 20 mm and the nominal length of 8000 mm according to EN 10060 made of steel grade 25CrMo4 (1.7218) according to EN 10083-3 in the heat treatment condition +A, inspection certificate 3.1 as specified in EN 10204. 20 round bars EN 10060 - 20x8000 EN 10083-3 – 25CrMo4+A EN 10204 - 3.1 or 20 round bars EN 10060 - 20x8000 EN 10083-3 – 1.7218+A EN 10204 - 3.1 6 Manufacturing process 6.1 General The manufacturing process of the steel and of the products is left to the discretion of the manufacturer with the restrictions given by the requirements in 6.2 to 6.4. 6.2 De-oxidation All steels shall be killed. 6.3 Heat treatment and surface condition at delivery 6.3.1 Untreated condition Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i.e. hot worked, condition. NOTE Depending on product shape and dimensions, not all steel grades can be delivered in the hot worked untreated condition. 6.3.2 Particular heat treatment condition If so agreed at the time of enquiry and order, the products shall be delivered with one of the particular heat-treatment conditions given in Table 1, lines 3 to 7, of EN 10083-2:2006 or Table 1, lines 3 to 6, of EN 10083-3:2006. 6.3.3 Particular surface condition If so agreed at the time of enquiry and order, the products shall be delivered with one of the particular surface conditions given in Table 2, lines 3 to 7, of EN 10083-2:2006 or EN 10083-3:2006. 6.4 Cast separation The products shall be delivered separated by cast.



EN 10083-1:2006 (E) 9 7 Requirements 7.1 Chemical composition, hardenability and mechanical properties 7.1.1 Chemical composition 7.1.1.1 The chemical composition determined by cast analysis shall comply with the values in Table 3 of
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.



EN 10083-1:2006 (E) 10 7.5 Internal soundness Where appropriate, requirements relating to the internal soundness of products shall be agreed at the time of enquiry and order, if possible with reference to European Standards. EN 10160 specifies requirements of ultrasonic testing of flat products of thickness equal to or greater than 6 mm and EN 10308 specifies requirements of ultrasonic testing of steel bars (see B.5). 7.6 Surface quality 7.6.1 All products shall have a smooth finish appropriate to the manufacturing processes applied, see also 6.3.3 7.6.2 Minor surface imperfections, which may occur also under normal manufacturing conditions, such as scores originating from rolled-in scale in the case of hot-rolled products, shall not be regarded as defects. 7.6.3 Where appropriate, requirements relating to the surface quality of the products shall be agreed on at the time of enquiry and order, if possible with reference to European Standards. Sheet/plate and wide flats shall be delivered with surface class A, subclass 1 according to EN 10163-2 unless otherwise agreed at the time of enquiry and order. Bars and rods shall be delivered with surface class A according to EN 10221 unless otherwise agreed at the time of enquiry and order. NOTE 1 Bars and rods for cold heading and cold extrusion and subsequent quenching and tempering are contained in EN 10263-4 (together with EN 10263-1). NOTE 2 It is more difficult to detect and eliminate surface discontinuities from coiled products than from cut lengths. This should be taken into account when agreements on surface quality are made. 7.6.4 Requirements relating to the permissible depth of decarburization may be agreed at the time of enquiry and order for special steels. The depth of decarburization shall be determined in accordance with the micrographic method specified in
EN ISO 3887. 7.6.5 If suitability of bars and rod for bright drawing is required, this shall be agreed at the time of enquiry and order. 7.6.6 The removal of surface defects by welding shall only be permitted with the approval of the customer or his representative. If surface discontinuities are repaired, the method and maximum depth of removal shall be agreed at the time of enquiry and order. 7.7 Dimensions, tolerances on dimensions and shape The nominal dimensions, tolerances on dimensions and shape for the product shall be agreed at the time of enquiry and order, if possible, with reference to the dimensional standards applicable (see Annex D). 8 Inspection 8.1 Testing procedures and types of documents 8.1.1 Products complying with the individual parts of this European Standard shall be ordered and delivered with one of the inspection documents as specified in EN 10204. The type of document shall be agreed upon at



EN 10083-1:2006 (E) 11 the time of enquiry and order. If the order does not contain any specification of this type, a test report shall be issued. 8.1.2 If, in accordance with the agreements made at the time of enquiry and order, a test report 2.2 is to be issued, it shall contain the following information: a) the confirmation that the material complies with the requirements of the order; b) the results of the cast analysis for all the elements specified in Tables 3 of EN 10083-2:2006 and
EN 10083-3:2006 for the steel grade concerned. 8.1.3 If, in accordance with the order agreements, an inspection certificate 3.1 or 3.2 is to be issued, the specific inspection described in 8.3, Clauses 9 and 10 shall be carried out and the results shall be confirmed in the inspection certificate. In addition, the inspection certificate shall contain the following information: a) the manufacturer's results for the cast analysis of all elements specified in the Tables 3 of
EN 10083-2:2006 and EN 10083-3:2006 for the steel grade concerned; b) the results of inspections and tests ordered as a result of supplementary requirements (see Annex B); c) the symbol letters or numbers relating the inspection certificate, test pieces and products to each other. 8.1.4 Unless otherwise agreed at the time of the order, inspection of surface quality and dimensions shall be carried out by the manufacturer (see also 6.3.3). 8.2 Frequency of testing 8.2.1 Sampling The verification of mechanical properties and hardenability shall be as specified in EN 10083-2 and
EN 10083-3. 8.2.2 Test units The test units shall be as specified in EN 10083-2 and EN 10083-3. 8.3 Tests to be carried out for specific inspection The tests to be carried out for specific inspection shall be as specified in EN 10083-2 and
EN 10083-3.



EN 10083-1:2006 (E) 12 9 Preparation of samples and test pieces 9.1 Selection and preparation of samples for chemical analysis The preparation of samples for product analysis shall be in accordance with EN ISO 14284. 9.2 Location and orientation of samples and test pieces for mechanical tests 9.2.1 Preparation of samples 9.2.1.1 The following samples shall be taken from one sample product of each test unit:  for normalized (+N) or quenched and tempered (+QT) products one sample for tensile testing;  for quenched and tempered (+QT) products one sample for one set of six impact test pieces (see 10.2.2). 9.2.1.2 From bars, rods and flat products the samples shall be taken in accordance with Figures 1 to 3. For hammer and drop forgings the test pieces shall be taken with their longitudinal axis parallel to the direction of principal grain flow from a position to be agreed at the time of enquiry and order. 9.2.2 Preparation of test pieces 9.2.2.1 General The requirements of EN ISO 377 shall apply. 9.2.2.2 Tensile test pieces The requirements of EN 10002-1 as appropriate shall apply. Test pieces may be non-proportional but in cases of dispute proportional test pieces having a gauge length
Lo = 5,65 0S shall be used. For flat products with a nominal thickness < 3 mm a test piece with constant gauge length in accordance with
EN 10002-1 shall be agreed at the time of enquiry and order. 9.2.2.3 Impact test pieces The test pieces shall be machined and prepared in accordance with EN 10045-1. In addition the following requirements apply for flat products: For nominal thicknesses > 12 mm, standard
10 mm x 10 mm test pieces shall be machined in such a way that one side is not further away than 2 mm from a rolled surface (see Figure 3). 9.3 Location and preparation of samples for hardness and hardenability tests The specifications given in EN 10083-2 and EN 10083-3 shall apply. 9.4 Identification of samples and test pieces Samples and test pieces
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