1、 ISO 2014 Heat-treatable steels, alloy steels and free-cutting steels Part 18: Bright steel products Aciers pour traitement thermique, aciers allis et aciers pour dcolletage Partie 18: Produits en aciers transforms froid INTERNATIONAL STANDARD ISO 683-18 Third edition 2014-09-15 Reference number ISO
2、 683-18:2014(E) ISO 683-18:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 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 or mechanical, including photocopying,
3、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 Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mai
4、l copyrightiso.org Web www.iso.org Published in Switzerland ISO 683-18:2014(E) ISO 2014 All rights reserved iii Contents Page Foreword iv 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 b
5、e supplied by the purchaser. 3 5.1 Mandatory information . 3 5.2 Options/Supplementary or special requirements . 4 6 Manufacturing process 5 6.1 General . 5 6.2 Treatment and surface condition at delivery 5 6.3 Traceability of the cast . 5 7 Requirements 5 7.1 Chemical composition, mechanical proper
6、ties and hardenability . 5 7.2 Machinability 6 7.3 Grain size 7 7.4 Non-metallic inclusions . 7 7.5 Internal soundness 7 7.6 Decarburization . 7 7.7 Shape, dimensions and tolerances . 7 7.8 Surface quality . 8 8 Inspection 8 8.1 Testing procedures and types of documents 8 8.2 Frequency of testing .
7、9 8.3 Specific inspection and testing 9 9 Test methods . 9 9.1 Chemical analysis 9 9.2 Mechanical tests . 9 9.3 Hardness and hardenability tests 10 9.4 Verification of dimensions .10 9.5 Retests .10 10 Marking .10 Annex A (informative) Steel grades and chemical composition according to ISO 630-2, IS
8、O 683-1, ISO 683-2, ISO 683-3, ISO 683-4 and ISO 16143-2 41 Annex B (normative) Ruling sections for mechanical properties .48 Annex C (normative) Supplementary or special requirements 51 Annex D (normative) Methods for evaluating straightness.53 Annex E (informative) Designation of steels given in t
9、his part of ISO 683 and of comparable grades covered in various designation systems .54 Bibliography .59 ISO 683-18:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internationa
10、l 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,
11、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
12、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. www.iso.org/directives Attention is drawn to the possibility that some of the elements
13、 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. w
14、ww.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 ISOs adherence to t
15、he WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and alloy steels. This third edition cancels and replaces the second edition (ISO
16、683-18:1996), which has been technically revised. ISO 683 consists of the following parts, under the general title Heat treatable, 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
17、 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 productsiv ISO 2014 All rights reserved INTERNATIONAL ST ANDARD ISO 6
18、83-18:2014(E) Heat-treatable steels, alloy steels and free-cutting steels Part 18: Bright steel products 1 Scope 1.1 This part of ISO 683 specifies the technical delivery requirements for bright steel bars in the drawn or peeled/turned condition and they are intended for mechanical purposes, for exa
19、mple for machine parts. The bright bars are subdivided into the following steel types: a) non-alloy general engineering steels; b) non-alloy free-cutting steels; c) non-alloy and alloy case-hardening steels; d) non-alloy and alloy steels for quenching and tempering; e) stainless steels. 1.2 In addit
20、ion 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
21、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method ISO 286-2, Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 2:
22、 Tables of standard tolerance classes and limit deviations for holes and shafts 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 determin
23、ation of the apparent grain size ISO 683-1, Heat-treatable steels, alloy steels and free-cutting steels Part 1: Non-alloy steels for quenching and tempering ISO 683-2, Heat-treatable steels, alloy steels and free-cutting steels Part 2: Alloy steels for quenching and tempering ISO 683-3: 1) , Heat-tr
24、eatable steels, alloy steels and free-cutting steels Part 3: Case-hardening steels ISO 683-4, Heat-treatable steels, alloy steels and free-cutting steels Part 4: Free-cutting steels ISO 3887, Steels Determination of depth of decarburization 1) To be published. (Revision of ISO 683-11:2012.) ISO 2014
25、 All rights reserved 1 ISO 683-18:2014(E) 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 a
26、lloy steels according to main quality classes and main property 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 hardn
27、ess 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/TR 9769, Steel and iron Review of available methods of analysis ISO 10474, Steel and steel products Inspection documents ISO 14284, Steel and
28、 iron Sampling and preparation of samples for the determination of chemical composition ISO 16143-2, Stainless steels for general purposes Part 2: Corrosion-resistant semi-finished products, bars, rods and sections 3 T erms an d definiti ons For the purposes of this document, the terms and definitio
29、ns given in ISO 377, ISO 4885, ISO 4948-1, ISO 4948-2, ISO 6929, ISO 14284 and the following apply. 3.1 bright steel products are drawn or peeled/turned bars with smoother surface quality and better dimensional accuracy in comparison with hot-rolled bars 3.2 drawn products products of various cross-
30、sectional shapes obtained, after descaling, by cold drawing of hot-rolled bars or rod, on a drawing bench (cold deformation without removing material) Note 1 to entry: This operation gives the product special features with respect to shape, dimensional accuracy and surface finish. Products in length
31、s are delivered straightened, products of small cross-section may also be supplied in coils. 3.3 peeled/turned products steel bars of circular cross-section having the same features of drawn products concerning shape, dimensional accuracy and bright surface finish but without work hardening Note 1 t
32、o entry: They are produced by peeling on a peeling machine usually followed by straightening and by polishing. The removal of metal by peeling is carried out in such a way that the bright product is generally free from surface defects and decarburization coming from the hot-rolling process. 3.4 grou
33、nd products drawn or peeled/turned round bars given an improved surface quality and dimensional accuracy by grinding or by grinding and polishing2 ISO 2014 All rights reserved ISO 683-18:2014(E) 3.5 thickness nominal dimension of the product Note 1 to entry: That means:a) the diameter in the case of
34、 rounds;b) the lateral length in the case of squares;c) the width over flats in the case of hexagons;d) the shorter lateral length in the case of flats (rectangular bars) and wide-flats.For special sections, thickness has to be defined at the time of enquiry and order. 3.6 out-of round difference be
35、tween the smallest and largest dimension measured across the pairs of opposing points at a common cross-section 3.7 ruling section that 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 produc
36、t, 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 te
37、mperature, show the same cooling rate as the actual ruling section of the product concerned at its position for taking the test pieces. 4 Classific ation and designation 4.1 Classification The classification of the relevant steel grades is allocated in accordance with ISO 4948-1 and ISO 4948-2. The
38、general engineering and the free cutting steels are quality steels. The steels for case hardening, for quenching and tempering and the stainless steels are special steels. 4.2 Designation For the steel grades covered by this document, the steel names given in the relevant tables are allocated in acc
39、ordance 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 (mass, number of bars) to be delivered; b) shape of the product (e.g. round, hexa
40、gon, square, flat); ISO 2014 All rights reserved 3 ISO 683-18:2014(E) c) the dimensions and tolerances of the product, see 7.7 and Tables 3 and 16 to 18; d) reference to this part of ISO 683, i.e ISO 683-18; e) the designation of the steel grade and the delivery condition (see Tables 5 to 15); f) st
41、andard 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 i
42、mplement 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) Reference testing for products used in the quenched and tempered condition (for steels for quenching and tempering only, see Table 1, footnote d and C.2); b)
43、 any fine grain requirement and verification of fine grain size (see 7.3 and C.3); c) non-destructive testing (see 7.5 and C.4); d) the disposition of tolerances in accordance with 7.7 and C.5; e) end conditions may be specified at the time of enquiry and order in accordance with C.6; f) product ana
44、lysis (see 7.1.2, Table 20 and C.7); g) for a minimum reduction ratio or minimum thickness deformation (see 6.1 and C.8) h) temporary corrosion protection (see 6.2.1 and C.9); i) any requirement to special marking (see Clauses 10 and C.10) j) any additionally requirement concerning the surface condi
45、tion, i.e. ground surface +G or polished surface +PL for round bars (see 6.2.2 and Table 3); k) surface quality class if another than the standard class is requested (see 7.8 and Table 4); l) verification of the straightness (see 7.7, Table 19 and Annex D); m) any requirement to the hardenability (+
46、H, +HH, +HL), for special steels only (see 7.1.4); n) any requirement regarding the permissible depth of decarburization (see 7.6); o) impact test at a temperature lower than room temperature (see 9.2.2). EXAMPLE 1 2 t round bars with nominal diameter 20 mm, tolerance h9, stock length 6000 mm made o
47、f steel grade C45 according to this standard in delivery condition +C, surface quality class 1 and a test report 2.2 as specified in ISO 10474. 2 t round bars 20 h9 stock 6000 steel grade ISO 683-18 - C45+C Inspection document ISO 10474 - 2.2 EXAMPLE 2 3 t round bars with nominal diameter 80 mm, tol
48、erance h8, stock length 6000 mm made of steel grade X5CrNi1810 according to this standard in process route +2B, surface quality class 3, with surface condition +2G and a certificate 3.1 as specified in ISO 10474.4 ISO 2014 All rights reserved ISO 683-18:2014(E) 3 t round bars 80 h8 stock 6000 steel
49、grade ISO 683-18 - X5CrNi1810+2B+2G I n s p e c t ion c e r t i f ic at e ISO 10 474 - 3 .1 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 C.8. 6.2 Treatment and surface condition at delivery 6.2.1 Treatment c
