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1、INTERNATIONAL STANDARD IS0 8734 Second edition 1997-11-15 Parallel pins, of hardened steel and martensitic stainless steel (Dowel pins) Goupilles cylindriques en acier trempk et en acier inoxydable martensitique This material is reproduced from IS0 documents under International Organization for Stan
2、dardization (ISO) Copyright License number IHS/ICC/f995. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of IS0 (Case postale 56,121
3、1 Geneva 20, Switzerland, Fax +41 22 734 IO 79), IHS or the IS0 Licensers members. Reference number IS0 8734:1997(E) IS0 8734: 1997(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing I
4、nternational Standards is normally carried out through IS0 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 liaiso
5、n with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication
6、as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8734 was prepared by Technical Committee ISOflC 2, Fasteners. This second edition cancels and replaces the first edition (IS0 8734:1987), which has been technically revised
7、. 0 IS0 1997 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 photocopying and microfilm, without permission in writing from the publisher. International Organization for Standa
8、rdization Case postale 56 l CH-1211 Geneve 20 l Switzerland Internet centraliso.ch x.400 c=ch; a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii INTERNATIONAL STANDARD IS0 IS0 8734:1997(E) Parallel pins of hardened steel and martensiticstainless steel (Dowel pins) 1 Scope This Internatio
9、nal Standard specifies the characteristics of parallel pins (dowel pins) of steel, through hardened or case hardened and martensitic stainless steel with nominal diameters, d, from 1 mm to 20 mm inclusive. 2 Normative references The following standards contain provisions which, through reference in
10、this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most rec
11、ent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 3269: 1988, Fasteners -Acceptance inspection. IS0 3506-1:1997, Corrosion-resistant stainless steel fasteners - Pat-t 7: Bolts, screws and studs. IS0 4042:-l, Faste
12、ners - Electroplated coatings. 3 Dimensions See figure 1 and table 1. Optional end shape at the manufacturers discretion 1 1 J-l 1) Radius and dimpled pin end permissible Figure 1 1) To be published. (Revision of IS0 4042:1989) -,-,- IS0 8734: 1997(E) IS0 1 m6) = I Range I 2, nom. min. max. - 3 2,75
13、 3.25 4 3,75 4,25 5 4,75 5,25 - 6 5.75 6.25 8 7.75 8,25 10 9.75 10.25 - 12 11.5 12,5 14 13.5 14,5 16 15.5 16,5 - 18 17.5 18,5 20 19,5 20,5 22 21.5 22,5 - 24 23.5 24.5 26 25,5 26.5 28 27,5 28.5 - 30 29.5 30.5 32 31,5 32.5 35 34,5 35,E - 40 39.5 40.5 45 44.5 45,E 50 49.5 50,e - - 55 54.25 55.75 60 59.
14、25 60.75 65 64.25 65.75 - - 70 69.25 70.75 75 74.25 75,75 80 79.25 80,75 - 85 84,25 85.75 90 89.25 go,75 95 94.25 95,75 100 99,25 100,75 - 1) Other tolerances as agreed between customer and supplier. Table 1 - Dimensions Dimensions in millimetre 1 1,5 2 2.5 3 4 5 6 8 10 12 16 20 0,2 0.3 0.35 0,4 0,5
15、 0,63 0,8 1,2 I,6 2 2.5 3 3.5 2) For nominal lengths above 100 mm, steps of 20 mm. of commercial 2 4 Requirements and reference International Standards See table 2. Table 2 - Requirements and reference International Standards IS0 8734: 1997(E) Steel Martensitic stainless steel st Cl in accordance wi
16、th IS0 3506-I pin through hardened pin case hardened Chemical composition limits (check analysis) % Vlaterial” C Si Mn P S Cr 0,95 to I,1 0,15 to 0,35 0,25 to 0,4 0.03 max. 0,025 max. I,35 to I,65 either or hardened and C 0,06 to 0.13 C 0,15 max. tempered to a Si 0,l to 0,4 Si 0,lO max. hardness of
17、Mn 0,25 to 0,6 Mn 0,9 to 1.3 460 HV30 to P 0,025 max. P 0,07 max. 560 HV30 S 0,05 max. S 0,15 to 0,35 Pb 0,15 to 0,35 at the suppliers discretion Hardness: 550 HV30 to 650 HV30 Surface hardness: 600 HVI to 700 HVl Hardness at case depth 0,25 to 0,4 mm: 550 HVl min. Plain, i.e. pins to be supplied in
18、 natural finish, treated with a protective lubricant, unless otherwise specified by agreement between customer and supplier. Surface If pins are surface coated appropriate plating or coating processes should be employed to avoid hydrogen embrittlement. When pins are electro- Plain, i.e. pins to plat
19、ed or phosphate-coated, they shall be suitably treated immediately be supplied in after plating or coating to obviate detrimental hydrogen embrittlement, natural finish. aithough freedom from hydrogen embrittlement ist not absolutely guaran- teed (see IS0 4042). All tolerances shall apply prior to t
20、he application of a plating or coating. Surface roughness Ra d 0.8 pm Pins shall be free of irregularities or detrimental defects. Workmanship No burrs shall appear on any part of the pin. Acceptability The acceptance procedure is covered in IS0 3269. I) Other materials as agreed between customer an
21、d supplier. -,-,- IS0 8734:1997(E) IS0 5 Designation EXAMPLE 1 A through hardened steel parallel pin type A, with nominal diameter d = 6 mm and nominal length I= 30 mm is designated as follows: Parallel pin IS0 8734 - 6 x 30 - A - St EXAMPLE 2 A martensitic stainless steel parallel pin of grade Cl,
22、with nominal diameter d = 6 mm and nominal length 1= 30 mm is designated as follows: Parallel pin IS0 8734 - 6 x 30 - Cl 4 -,-,- IS0 8734:1997(E) ICS 21.06050 Descriptors: fasteners, steel products, pins (mechanics), straight pins, specifications, characteristics, dimensions, designation Price based on 4 pages