《BS-HR-650-1972.pdf》由会员分享，可在线阅读，更多相关《BS-HR-650-1972.pdf（8页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD AEROSPACE SERIES BS HR 650:1972 (Superseding Ministry of Defence Specification D.T.D. 5026.) Incorporating Amendment Nos. 1 and 2Specification for High expansion heat-resisting steel bar and wire for the manufacture of bolts, studs, set screws and nuts (Ni 25.5, Cr 15, Ti 2, Mn 1.5,
2、 Mo 1.25, Si 0.7, V 0.3) (Limiting ruling section 20 mm) UDC 629.7:669.14.018-4-42:669 1524262957428782292:621:882 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 The British Standard, having bee
3、n approved by the Aerospace Industry Standards Committee was published under the authority of the Executive Board of the Institution on 7 April 1972 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/48 Draft for comment 70/25863 ISBN 0 580 06899 4
4、A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises
5、a front cover, an inside front cover, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Dat
6、e of issueComments 1817September 1975 3589August 1981Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 BSI 01-2000i Contents Page 1Inspection and testing proce
7、dure1 2Manufacture1 3Chemical composition1 4Cold working1 5Condition1 6Freedom from surface contamination1 7Heat treatment1 8Mechanical properties2 9Grain size2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI i
8、i blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 BSI 01-20001 NOTE 1This specification complies with AICMA Recommendation FE-PA92-HT. NOTE 2Other forms of this alloy are covered by British
9、 Standards: BS HR.51, Billets, bars, forgings and parts. 1 Inspection and testing procedure This British Standard shall be used in conjunction with sections 1 and 9 of the latest issue of BS HR 100. 2 Manufacture Unless otherwise agreed between the manufacturer and the purchaser in accordance with B
10、S HR 100 the material shall be manufactured by an electric process followed by consumable electrode vacuum arc remelting. 3 Chemical composition The alloy shall contain: 4 Cold working All material shall be softened in accordance with 7.1 and subsequently reduced 15 % to 25 % in cross-sectional area
11、 during final drawing or rolling at a temperature of not more than 870 C. 5 Condition Unless otherwise agreed, the material shall be supplied in the appropriate condition stated below. The condition or the use for which the material is intended shall be stated on the order. 6 Freedom from surface co
12、ntamination Material shall be inspected for freedom from surface contamination in accordance with the requirements of BS HR 100. 7 Heat treatment 7.1 Softening treatment. The material shall be heated uniformly at a temperature of 900 10 C for not less than 1 h followed by cooling in air, oil or wate
13、r. 7.2 Solution treatment. The material and test samples, as appropriate, shall be heated uniformly at a temperature of 980 10 C for not less than 1 h followed by cooling in air, oil or water. 7.3 Precipitation treatment. The material and test samples, as appropriate, shall be heated uniformly at a
14、temperature of 720 10 C for not less than 16 h followed by cooling in air. Element % min.max. Carbon0.08 Silicon1.0 Manganese2.0 Phosphorus0.020 Sulphur0.015 Aluminium0.35 Boron0.00300.010 Chromium13.516.0 Molybdenum1.01.5 Nickel24.027.0 Lead0.0050 Titanium1.92.3 Vanadium0.100.50 IronRemainder Gr 2
15、MaterialCondition of supply Material for machiningSoftened, cold worked, solution treated and machined or ground OR Softened, cold worked, solution treated, precipitation treated and machined or ground Material for forgingSoftened, cold worked and machined or ground OR Softened, cold worked, solutio
16、n treated and machined or ground Parts after machining or forging Solution treated and precipitation treated Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 2 BSI 01-2000 8 Mechanical properties
17、8.1 Mechanical tests. The mechanical properties obtained from test pieces selected, prepared and tested in accordance with the relevant requirements of BS HR 100 shall be as follows: 8.1.1 Stress rupture test (combined notched and unnotched test piece). 8.1.2 Tensile test at room temperature NOTE1 N
18、/mm2 = 1 MN/m2 = 0.102 kgf/mm2 = 0.065 tonf/in2. Information on SI units is given in BS 3763, “The International System of units (SI)”; see also BS 350, “Conversion factors and tables”. 8.2 Hardness test 1) The hardness of material heat treated in accordance with 7.2 shall be not more than 200HB. 2)
19、 The hardness of material and test samples heat treated in accordance with 7.2 and 7.3 shall be: 248 min./341 max. HB or 260 min./360 max. HV 9 Grain size 9.1 Sample preparation 9.1.1 Material supplied in the cold worked condition. Prior to examination each sample selected for grain size determinati
20、on shall be solution treated and precipitation treated in accordance with 7.2 and 7.3. 9.1.2 Material supplied in the solution treated condition. Prior to examination each sample selected for grain size determination shall be precipitation treated in accordance with 7.3. 9.1.3 Material supplied in t
21、he solution treated and precipitation treated condition. Samples selected for grain size determination shall be examined without further heat treatment. 9.2 Samples shall exhibit a uniform average grain size of 0.065 mm or finer. TemperatureStress Time to rupturea Elongation at rupturea CN/mm2h% min
22、.min.min. 650480234.0 a Rupture shall occur in the unnotched portion of the test piece. 0.2 % proof stress Tensile strength Elongation Reduction of area N/mm2N/mm2% min.min.min.min. 5909001220 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 20
23、06, Uncontrolled Copy, (c) BSI 3blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national bo
24、dy responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the late
25、st amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which c
26、an be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards
27、 publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on stan
28、dards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Informatio
29、n Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8
30、996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system o
31、r transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these
32、details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI