BS-S-202-1967.pdf
《BS-S-202-1967.pdf》由会员分享,可在线阅读,更多相关《BS-S-202-1967.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD AEROSPACE SERIES BS S 202:1967 (Superseding Ministry of Technology Specification D.T.D. 5B) Incorporating Amendment No.1 Specification for Patented cold drawn carbon steel wire and springs (High duty ground wire) UDC 629.7; 669.14 426 + 669.14 272 Licensed Copy: London South Bank Un
2、iversity, London South Bank University, Sat Dec 09 02:58:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 202:1967 This British Standard, having been approved by the Aerospace Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the a
3、uthority of the General Council of the Institution on 24 August 1967 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment D65/12019 ISBN 0 580 34413 4 A British Standard does not purport to include all the necessary provisions of
4、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 a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back c
5、over. 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.DateComments 530June 1970Indicated by a sideline in the margin Licensed Copy: Londo
6、n South Bank University, London South Bank University, Sat Dec 09 02:58:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 202:1967 BSI 02-2000i Contents Page 1Inspection and testing procedure1 2Process of manufacture1 3Chemical composition1 4Surface dressing1 5Condition1 6Freedom from defects1 7Fin
7、al heat treatment2 8Mechanical properties2 9Examination for decarburization3 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:58:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, S
8、at Dec 09 02:58:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 202:1967 BSI 02-20001 NOTEWire to this specification is suitable for high duty dynamically stressed springs. For other applications where a hard drawn wire is required, wire to BS S 201 should be used. 1 Inspection and testing proced
9、ure 1.1 General. This British Standard shall be used in conjunction with BS 3S 100 Sections 1 and 10. 1.2 Sulphur printing or deep etching tests. Samples shall be selected in accordance with BS 3S 100, Section 1, Clause 7.2.2. 2 Process of manufacture The material shall be manufactured by an open he
10、arth, an oxygen or an electric process unless otherwise agreed between the manufacturer and the purchaser in accordance with BS 3S 100, Section 1, Clause 3.1. 3 Chemical composition 3.1 The steel shall contain: 3.2 For special requirements, spring makers may specify limits of carbon and manganese wi
11、thin those stated in Clause 3.1. 4 Surface dressing 4.1 The material from which the rods are rolled shall be locally dressed in accordance with the requirements of BS 3S 100, Section 1, Clause 5.2. 4.2 At a convenient stage of manufacture, the wire or the rod from which it is drawn shall be ground o
12、r machined all over in order to remove surface defects and decarburization. 5 Condition The material shall be supplied in the appropriate condition stated below unless otherwise agreed between the manufacturer and the purchaser, in which case the condition in which the material is to be supplied sha
13、ll be stated on the order. 6 Freedom from defects Samples, selected and prepared for examination in accordance with BS 3S 100, Section 10, Clause 1.3.2. or Clauses 2.3.2 and 2.3.3, shall be immersed in a 50 per cent solution of concentrated hydrochloric acid in water at a temperature of not less tha
14、n 85 C (185 F). The time of immersion shall be approximately 2 seconds for every 0.025 mm (0.001 in) of diameter but shall be not less than 2 minutes nor more than 10 minutes. Element Per cent Min.Max. Carbon0.550.85 Silicon0.100.35 Manganese0.301.00 Chromium0.08 Nickel0.10 Sulphur0.025 Phosphorus0.
15、025 MaterialCondition of supply Rod for the manufacture of wireAs rolled Wire for the manufacture of springsPatented and cold drawn SpringsFinally heat treated Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:58:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
16、 S 202:1967 2 BSI 02-2000 7 Final heat treatment The final heat treatment of the springs and the tensile test pieces representing the springs shall be: Low temperature heat treat at a temperature between 250 C and 375 C (480 F and 710 F) for not less than 15 minutes nor more than 45 minutes. 8 Mecha
17、nical properties 8.1 Tensile test (wire and springs only) 8.1.1 Wire. The tensile properties of test pieces for wire selected and prepared in accordance with BS 3S 100, Section 10, Clause 2.5, shall comply with the tensile range given in the table below. 8.1.2 Test pieces representing springs. The t
18、ensile properties of test pieces representing springs, selected and prepared in accordance with BS 3S 100, Section 10, Clause 3.6, and heat treated in accordance with Clause 7 shall comply with the minimum tensile strength values given in the table below. 8.2 Torsion test wire only not greater than
19、5.10 mm (0.201 in) diameter or thickness. The test pieces, selected in accordance with BS 3S 100, Section 10, Clause 2.5, shall be taken from wire in the condition as delivered and shall not be heat treated before being tested in accordance with BS 3S 100, Section 10, Clause 2.6.2.1 or 2.6.3. Metric
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS 202 1967
链接地址:https://www.31doc.com/p-3750871.html