1、 ISO 2016 Heat-treatable steels, alloy steels and free-cutting steels Part 2: Alloy steels for quenching and tempering Aciers pour traitement thermique, aciers allis et aciers pour dcolletage Partie 2: Aciers allis pour trempe et revenu INTERNATIONAL STANDARD ISO 683-2 Second edition 2016-07-01 Refe
2、rence number ISO 683-2:2016(E) ISO 683-2:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic
3、 or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier,
4、Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 683-2:2016(E)Foreword v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 2 4 Classification and designation . 3 4.1 Classification . 3 4.2 Designation 3 5 Information to be supplied by the
5、purchaser. 3 5.1 Mandatory information . 3 5.2 Options and/or supplementary or special requirements 3 5.3 Ordering example . 4 6 Manufacturing process 4 6.1 General . 4 6.2 Deoxidation 4 6.3 Heat-treatment condition and surface condition at delivery . 4 6.3.1 Heat-treatment condition 4 6.3.2 Particu
6、lar surface conditions 4 6.4 Traceability of the cast . 4 7 Requirements 5 7.1 Chemical composition, mechanical properties and hardenability . 5 7.1.1 General 5 7.1.2 Chemical composition . 5 7.1.3 Mechanical properties 5 7.1.4 Hardenability 5 7.1.5 Surface hardness 5 7.2 Machinability 5 7.3 Cold sh
7、earability 5 7.4 Grain size 6 7.5 Non-metallic inclusions . 6 7.5.1 Microscopic inclusions . 6 7.5.2 Macroscopic inclusions 6 7.6 Internal soundness 6 7.7 Surface quality . 6 7.8 Decarburization . 7 7.9 Shape, dimensions and tolerances . 7 8 Inspection 7 8.1 Testing procedures and types of documents
8、 7 8.2 Frequency of testing . 7 8.3 Specific inspection and testing 8 8.3.1 Verification of the hardenability, hardness and mechanical properties 8 8.3.2 Visual and dimensional inspection 8 9 Test methods . 8 9.1 Chemical analysis 8 9.2 Mechanical tests . 8 9.2.1 Tensile test 8 9.2.2 Impact test . 8
9、 9.3 Hardness and hardenability tests . 8 9.3.1 Hardness in treatment conditions +A and +S . 8 9.3.2 Verification of hardenability 9 9.3.3 Surface hardness 9 9.4 Retests 9 ISO 2016 All rights reserved iii Contents Page ISO 683-2:2016(E)10 Marking 9 Annex A (normative) Ruling sections for mechanical
10、properties .31 Annex B (normative) Supplementary or special requirements 35 Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems37 Annex D (informative) Dimensional standards applicable to products complying with th
11、is part of ISO 683 .39 Bibliography .40 iv ISO 2016 All rights reserved ISO 683-2:2016(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 ou
12、t 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 co
13、llaborates 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 app
14、roval 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
15、 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
16、 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 conformit y assessment, as well as information about ISOs adherence to the World Trade Organi
17、zation (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
18、683-2:2012), 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-har
19、dening 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 ISO 2016 All rights reserved v Heat-treatable s
20、teels, alloy steels and free-cutting steels Part 2: Alloy steels for quenching and tempering 1 Scope This part of ISO 683 specifies the technical delivery requirements for semi-finished products, hot formed, e.g. blooms, billets, slabs (see Note 1), bars (see Note 1), wire rod, finished flat product
21、s, and hammer or drop forgings (see Note 1) manufactured from the direct hardening alloy steels and the alloy flame- and induction-hardening steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types of products in Table 1 and in one of the surface co
22、nditions given in Table 2. The steels are, in general, intended for the manufacture of quenched and tempered or austempered (see 3.2 and Note 2) and flame- or induction-hardened machine parts (see Tables 8 and 9). The requirements for mechanical properties given in this part of ISO 683 are restricte
23、d to the sizes given in the relevant Table 8. NOTE 1 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 “hammer and drop forgings”. NOTE 2 For the p
24、urposes of simplification, the term “quenched and tempered” is, unless otherwise indicated, used in the following also for the austempered condition. NOTE 3 For International Standards relating to steels complying with the requirements for the chemical composition in Table 3, however, supplied in ot
25、her product forms or treatment conditions than given above or intended for special applications, and for other related International Standards, see the Bibliography. NOTE 4 This part of ISO 683 does not apply to bright products and bars and wire rod for cold heading. For such products, see ISO 683-1
26、8 and ISO 4954. 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 appl
27、icable. 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 a
28、ny amendments) applies. ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method INTERNATIONAL ST ANDARD ISO 683-2:2016(E) ISO 2016 All rights reserved 1 ISO 683-2:2016(E) ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechanical testin
29、g ISO 404:2013, Steel and steel products General technical delivery requirements ISO 642, Steel Hardenability test by end quenching (Jominy test) ISO 643, Steels Micrographic determination of the apparent grain size ISO 3887, Steels Determination of depth of decarburization ISO 4885: 1) , Ferrous pr
30、oducts 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 propert
31、y 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 6508-1, Metallic materials Ro
32、ckwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature ISO 6929, Steel products Vocabulary ISO 7788, Steel Surface finish of hot-rolled plates and wide flats Delivery requirements ISO
33、 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 ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition 3
34、T erms a nd definiti ons For the purposes of this document, the definitions in ISO 377, ISO 4885, ISO 4948-1, ISO 4948-2, ISO 6929, ISO 14284, and the following apply. NOTE For deviations from these terms and definitions, see Notes 1 and 2 of Clause 1. 3.1 ruling section section for which the specif
35、ied 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
36、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. 1) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016.2 ISO 2016 All rights reserved ISO 683-2:2016(E) 3.2 aus
37、tempering isothermal heat treatment for producing bainitic or ausferritic structure of a work piece Note 1 to entry: The final cooling to ambient temperature is not at a specific rate. SOURCE: ISO 4885: 2) , 3.11 3.3 alloy steel as defined in ISO 4948-1:1982, 3.1.3 4 Classific ation and designation
38、4.1 Classification The classification of the relevant steel grades is according to ISO 4948-1 and ISO 4948-2. All steel grades covered by this part of ISO 683 are alloy special steels. 4.2 Designation For the steel grades covered by this part of ISO 683, the steel names as given in the relevant tabl
39、es 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 to be delivered; b) designation of the product form (slab,
40、 bloom, billet, round bar, wire rod, wide flat, sheet, plate, strip, forging, etc.); c) either the designation of the dimensional standard and the dimensions and tolerances selected from this (see 7.9) or, for example in the case of drop forgings, the designation of the drawing or any other document
41、 covering the dimensions and tolerances required for the product; d) reference to this part of ISO 683, i.e. ISO 683-2; e) the designation of the steel grade given in Table 3; f) the symbol for the required heat-treatment condition (see Table 1, column 2); g) standard designation for a test report 2
42、.2 or, if required any other type of inspection document in accordance with ISO 10474 or according to another regional standard, e.g. EN 10204 or JIS G 0415. 5.2 Options and/or supplementary or special requirements Several options are specified in this part of ISO 683 and listed below. If the purcha
43、ser does not indicate 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) if another surface condition than “hot worked” or a special surface quality is required, the surface condition (see Table 2) and the surface qua
44、lity (see 7.7); 2) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016. ISO 2016 All rights reserved 3 ISO 683-2:2016(E) b) any requirement for the hardenability (+H, +HH, +HL) for special steels (see 7.1.4 and Tables 5 to 7); c) any supplementary requirement that shall be complie
45、d with, the symbol and, where necessary, the details of this supplementary requirement (see Annex B); d) any requirement for the verification of non-metallic inclusion content (see 7.5); e) verification of hardenability and, if agreed, the information about calculation of the hardenability (see 9.3.
46、2); f) any requirement regarding the permissible depth of decarburization (see 7.8); g) suitability of bars and rod for bright drawing (see 7.7.4); h) any requirement relating to the removal of surface defects (see 7.7.5). 5.3 Ordering example EXAMPLE Fifty hot-rolled round bars according to ISO 103
47、5-1 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 class L2 of ISO 1035-4 made of steel grade ISO 683-2, 42CrMo4 (see Table 3) in the heat-treatment condition +S (see Table 1), surface blast cleane
48、d (+BC) (see Table 2), product analysis/option B.4 with an inspection certificate 3.1 according to ISO 10474: 50 round bars ISO 1035 40,0S 8 000L2 ISO 683-2 42CrMo4+S +BC option B.4 ISO 10474 3.1 6 Manufacturing process 6.1 General The manufacturing process of the steel and of the products is, with
49、the restrictions given by the requirements in 6.2 to 6.4, left to the discretion of the manufacturer. For minimum reduction ratio or minimum thickness deformation ratio of rolled and forged products, see B.5. 6.2 Deoxidation All steels shall be deoxidized. 6.3 Heat-treatment condition and surface condition at delivery 6.3.1 Heat-treatment condition The products shall be delivered in one of the heat-treatment conditions given in Table 1, lines 2 to 6 as agre
