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1、STD-JIS G 7105-ENGL 2000 W 4933b08 0570041 573 JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Heat-treatable steels, alloy steels and free-cutting steels- Part 18 : Bright products of unalloyed and low alloy steels ICs 77.140.10; 77.140.20; 77.140.45 Descript
2、ors : unalloyed steels, low-alloy steels, heat-treatable steels, product Reference number : JIS G 7105 : 2000 (E) specification 23 S Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 22:14:50
3、 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS G 7LO5-ENGL 2000 = 4733b08 0570042 42T G 7105 : 2000 (IS0 683-18 : 1996) Foreword This translation has been made based on the original Japanese Industrial Standard established by the Minister of International Trade an
4、d Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. For bright products, we investigated and discussed to conform JIS and cor- responding IS0 Standards based on “The three year plan of international conformity” in Age
5、ncy of Industrial Science and Technology, but differences between standard systems and between basic specifications (JIS specifies dimension system as one of the most important elements, but IS0 specifies that it is to be decided at ordering), and this specification has been quoted in Electricity Ut
6、ilities Industry Law and Fire Service Law in Japan. There- fore, we considered that the forced conformance to IS0 results in confusion of the market and also problems for safety of structures will occur. Seeking conformance to IS0 Standards for bright products, this Standard has been prepared based
7、on IS0 683-18 Heat-treatable steels, alloy steels and free-cutting steels-Part 18 :Bright products of unalloyed and low alloy steels, which considered useful to JIS, to give users information of the contents of IS0 Standard and to facilitate popularization. Attention is drawn to the possibility that
8、 some parts of this Standard may conflict with a patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Sta
9、ndards Committee are not responsible for identifying the patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 2000-07-20 Da
10、te of Public Notice in Official Gazette: 2000-07-21 Investigated by: Japanese Industrial Standards Committee Divisional Council on Iron and Steel TIS G 7105 :2000, First English edition published in 2001-03 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo
11、, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including
12、 photocopying and microfilm, without permission in writing from the publisher. Printed in Japan . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 22:14:50 MDTNo reproduction or networking p
13、ermitted without license from IHS -,-,- STD-JIS G 7LOS-ENGL ZOO0 D 4933b08 0570043 3 b b m JAPANESE INDUSTRIAL STANDARD JIS G 7105:ZOOO (IS0 683-18 : 1996) Heat-treatable steels, alloy steels and free-cutting steels- Part 18 : Bright products of unalloyed and low alloy steels Introduction This Japan
14、ese Industrial Standard has been prepared based on the second edition of IS0 683-18 Heat-treatable steels, alloy steels and fiee-cutting steels- Part 18 : Bright products of unalloyed and low alloy steels, published in 1996 with- out changing the technical contents. 1 Scope 1.1 This Standard applies
15、 to wrought unalloyed and alloyed steels in the form or bright products which are intended for mechanical purposes, for example for ma- chine parts. It is subdivided as follows: a) clauses 5 and 6: general requirements and tests; b) clause 7: case-hardening steels; c) clause 8: steels for quenching
16、and tempering. 1 . 2 In addition to this Standard, the general technical delivery requirements of IS0 404 are applicable. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. At the time of publica- tion, the
17、 editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain reg- isters of currently valid
18、International Standards. IS0 83 : 1976 Steel-Charpy impact test (U-notch) IS0 148 : 1983 Steel-Charpy impact test (V-notch) IS0 377-i : 1989 Selection and preparation of samples and test pieces of wrought steels-Part 1 : Samples and test pieces for mechanical test (1) IS0 404 : 1992 Steel and steel
19、products-General technical delivery requirements IS0 642 : 1979 Steel-Hardenability test by end quenching (Jominy test) IS0 643 : 1983 Steels-Micrographic determination of the ferritic or austenitic grain size IS0 4948-1 : 1982 Steels-Classification-Part 1 : Classification of steels into un- alloyed
20、 and alloy steels based on chemical composition IS0 4948-2 : 1981 Steels-Classification-Part 2 : Classification of unalloyed and alloy steels according to main quality classes and main prop- erty or application characteristics Copyright Japanese Standards Association Provided by IHS under license wi
21、th JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 22:14:50 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS G 7LOS-ENGL 2000 M 4933b08 0570044 2T2 = IS0 6506 : 1981 Metallic materials-Hardness test-Brinell test IS0 6892 : 1984 Meta
22、llic materials-Tensile testing IS0 6929 : 1987 Steel products-Definitions and classification IS0 9443 : 1991 Heat-treatable and alloy steels-Surface quality classes for hot- rolled round bars and wire rods-Technical delivery conditions ISO/TR 9769 : 1991 Steel and iron-Review of available methods of
23、 analysis IS0 10474 : 1991 Steel and steel products-Inspection documents IS0 14284 : 1996 Steel and iron-Sampling and preparation of samples for the determination of chemical composition Note (1) IS0 377-1 has been revised as IS0 377 : 1997. 3 Definitions For the purposes of this Standard, the relev
24、ant definitions given in IS0 4948-1, IS0 4948-2 and IS0 6929, and also the definition given in d), ap- Ply- a) Bright products For definition of drawn products, turned (or peeled) prod- ucts and ground products, see IS0 6929. b) Unalloyed and alloyed steel See IS0 4948-1. c) Special steel See IS0 49
25、48-2. d) Thickness uct, that means: - the diameter in the case of rounds; - the lateral length in the case of squares; - the width over flats in the case of hexagons; - the shorter lateral length in the case of flats. Thickness is considered to be the nominal dimension of the prod- 4 Ordering 4 . 1
26、a) The purchaser shall state in this enquiry and order the dimensions and tolerances of the product (see 5.10); b) the steel type (see tables 3, 7, 8, 11, 15, 16 and 17); c) the treatment condition (see 5.3.1); d) e) the surface-coating treatment, if any (see 5.3.2); the required type of document (s
27、ee 6 . 1 ) . . . 4 . 2 also state in his enquiry and order his related requirements as shown in table 1. Certain options in ordering are permitted by this Standard. The purchaser may Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Use
28、r=Wing, Bernie Not for Resale, 03/12/2007 22:14:50 MDTNo reproduction or networking permitted without license from IHS -,-,- STD.JIS G 7105-ENGL 2000 Li933b08 0570045 139 m 3 G 7105 : 2000 (IS0 683-18 : 1996) For steels of tables 3, 11 Table 1 Permitted options in ordering - _ _ _ Permitted options
29、f) whether a product analysis is required (see 6.2.1); 3, 11 gl) the choice of the surface quality class selected from IS0 9443 see 5.8.1 ell; g2) whether special specifications for the limits of surface defects are required see 5.8.1 f)l; I 3, 11 I h) whether, specifically, coarse or fine grain ste
30、el is required (see 5.7); 3, 11 i) whether, for special steels, the microscopically determined non-metallic inclusion content shall be within agreed limits (see 5.9.2); 11 5 General requirements j) whether, for drawn products, special specifications for the permissible depth of the femtic-pearlitic
31、decarburization are required see 5.8.2 a). 5.1 Manufacture of the steel and of the product 5 . 1 . 1 Unless otherwise agreed in the order, the process used in making the steel and the product are left to the discretion of the manufacturer. When he so requests, the user shall be informed what steelma
32、king process is being used. 5.1.2 The steels shall be killed. 5.2 Cast separation The steels are delivered by casts. 5.3 TFeatment condition at the time of delivery 5.3.1 The treatment and heat-treatment condition (if any) at the time of delivery must comply with the condition agreed in the order an
33、d shall be one of the condi- tions indicated in table 2 or 10. (See also 5.8.1.) 5.3.2 Bright steel is supplied commercially with a light coating of grease, provided that nothing to the contrary is laid down i n the regulations of the freighter regard- ing unpacked piece goods. The usual light appli
34、cation of ordinary grease does not afford positive protection against rusting, particularly in the presence of water due to condensation. The use of a selected rust inhibitor or a special type of packing shall, if required, be agreed upon at the time of enquiry and order. 5.4 Survey of combinations
35、of usual treatment conditions on delivery and requirements Tables 2 and 10 give a survey of combinations of usual treatment conditions on delivery and requirements concerning chemical composition, mechani- cal properties and hardenability. Copyright Japanese Standards Association Provided by IHS und
36、er license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 22:14:50 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS G 7105-ENGL 2000 W 4733bOB 057004b 075 D 4 G 7105 : 2000 (IS0 683-18 : 1996) 5.5 Chemical composition 5.5.1 Th
37、e chemical composition of the steels, determined by the cast analysis, shall be in accordance with the specifications in tables 3 and 11 (see 5.5.3). 5.5.2 Tables 4 and 12 give the permissible deviations between the values given in tables 3 and 11 and those from the product analysis. 5.5.3 If case-h
38、ardening or direct-hardening steels are ordered by using the desig- nation given in table 7, 8, 15, 16 or 17 to hardenability requirements for Jominy test pieces, the hardenability values shall be regarded as the governing criteria for acceptance. In such cases, the cast analysis may deviate from th
39、e values shown in tables 3 and 11 by the values given in footnote 1) to table 3 and footnote 3) to table 11. 5.6 Hardenability and mechanical properties The products shall fulfil the speci- fications of 7.2.3 and 8.2.3. 5.7 Structure If a controlled austenitic grain size is required, the austenitic
40、grain size of the steel determined in accordance with 6.3.4 shall be 5 and finer for fine grain steels and 1 to 5 for coarse grain steels. The grain structure shall be consid- ered satisfactory if 70 % is within the specified limits. 5.8 Outer soundness 5.8.1 Surface quality In the case of hexagons,
41、 squares, flats and special sections, the achievement of a light bright surface is precluded by the manufacturing methods used; the surface is darker than that of bright rounds. Heat treatment (e.g. stress relieving, soft annealing, normalizing, quenching and tempering) applied after drawing, centre
42、less turning, grinding or polishing makes the surface darker and rougher. Pitting, scars and grooves are permitted on a localized scale; in the case of rounds, their depth shall not be greater than IS0 tolerance zone hll. In the case of bright products with different shapes, comparative samples may
43、be agreed upon at the time of enquiry and order. If a surface quality that is superior to that obtained from the usual method of drawing once only or by centreless turning is required, an additional treatment (e.g. redrawing, grinding or polishing) may be agreed upon at the time of en- quiry and ord
44、er. This is in particular necessary for a light bright and very smooth surface which may be needed for electrolytic surface coating. Longitudinal surface defects cannot be completely avoided when rolling and they are retained when drawing. Therefore, in the case of drawn products, agree- ments may b
45、e made concerning the permissible depth of such defects and their examination. In the case of rounds, these agreements shall be based on IS0 9443. . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/
46、12/2007 22:14:50 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS G 7105-ENGL 2000 9733b08 0570097 TO1 a 5 G 7105 : 2000 (IS0 683-18 1996) . f) If special requirements concerning the limits of surface defects exist, the prod- ucts shall be centreless-turned in a suit
47、able way, and shall also be ground to improve the surface microstructure of rounds. Such requirements shall be agreed upon, if necessary, at the time of enquiry and order. 5.8.2 Decarburization a) Drawn products of the steels in table 11 shall, independent of their heat-treat- ment conditions, be fr
48、ee from completely ferritic decarburized zones. For such products, values for the permissible depth of the partial (ferritic- pearlitic) decarburization may be agreed upon at the time of enquiry and order. Bright products of the steels in table 3 or 11 which, according to the order, were peeled or g
49、round or polished shall be free from decarburization. b) 5.9 Internal soundness 5.9.1 The steel shall be free from internal defects likely to have an adverse effect during further processing or use. 5.9.2 Where appropriate, exact criteria for the compliance of the steel with the general requirement in 5.9.1 shall be