1、BRITISH STANDARD AEROSPACE SERIES BS 2S 513:1970 (Superseding BS S 513) Incorporating Amendment No. 1 Specification for spring steel strip UDC 629.7:669.14.018.27 418 BS 2S 513:1970 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the aut
2、hority of the Executive Board of the Institution on 30 October 1970 BSI 30 May 2003 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 69/33644 ISBN 0 580 06194 9 Amendments issued since publication Amd. No. Date Comments 14156 30 May 2003
3、Indicated by a sidelineBS 2S 513:1970 BSI 30 May 2003 i Contents Page Foreword ii 1 Inspection and testing procedure 1 2 Process of manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Final heat treatment 1 7 Decarburization 2 8 Mechanical properties 2BS 2S 513:1970 ii BSI 30
4、 May 2003 Foreword This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
5、t cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.BS 2S 513:1970 BSI 30 May
6、2003 1 1 Inspection and testing procedure 1.1 This British Standard shall be used in conjunction with the relevant sections of the latest edition of BS S 500. 1.2 The thickness of the material shall be in accordance with the latest edition of BS S 500. Material which has been finally hot-rolled prio
7、r to softening or hardening and tempering shall satisfy the tolerances applicable to hot-rolled steel sheet or strip (excluding mild steel). Material which has been finally cold-rolled prior to softening or hardening and tempering shall satisfy the tolerances applicable to cold-rolled steel sheet an
8、d strip (excluding mild steel). 1.3 Sulphur printing or deep etching tests. Samples shall be selected in accordance with the latest edition of BS S 500. 2 Process of manufacture The material shall be manufactured by an oxygen, open hearth or electric process, unless otherwise agreed between the manu
9、facturer and the purchaser in accordance with the latest edition of BS S 500. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be locally dressed in accordance with the requirements of the latest edition of BS S 500. 5 Condition 5.1 The materials shall be supplie
10、d in one of the following conditions after final hot or cold rolling. 1) Softened. 2) Hardened and tempered. 5.2 The condition required shall be stated on the order. Unless otherwise agreed the method of rolling shall be at the option of the manufacturer, but shall be stated in the release note. 5.3
11、 Finished parts shall be supplied finally heat-treated. 6 Final heat treatment The final heat treatment shall be as follows. 1) Harden by cooling in a suitable manner from a temperature not exceeding 860 C. 2) Temper at a suitable temperature to give the specified mechanical properties. Element % mi
12、n. max. Carbon 0.70 0.90 Silicon 0.10 0.35 Manganese 0.35 0.90 Phosphorus 0.040 Sulphur 0.040BS 2S 513:1970 2 BSI 30 May 2003 7 Decarburization The decarburization determined in accordance with the latest edition of BS S 500 shall be not more than 0.04 mm (0.0015 in). 8 Mechanical properties 8.1 The
13、 mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of the latest edition of BS S 500 shall comply with the following. 8.1.1 Tests in the softened condition 1) Hardness. The hardness of the material shall be not more than 220 HV. 2) Sin
14、gle bend test a) Strip 1.25 mm (0.049 in) or thinner. The test piece shall be bent without cracking through an angle of 180 over a former with a radius equal to half the nominal thickness of the strip. b) Strip thicker than 1.25 mm (0.049 in). The test piece shall be bent without cracking through an
15、 angle of 180 over a former with a radius equal to the nominal thickness of the strip. 8.1.2 Tests in the hardened and tempered condition 1) Hardness. The hardness of the material shall be: 400 min./500 max. HV. 2) Single bend test a) Strip 1.25 mm (0.049 in) or thinner. The test piece shall be bent
16、 without cracking through an angle of 90 over a former with a radius equal to five times the nominal thickness of the strip. b) Strip thicker than 1.25 mm (0.049 in). The test piece shall be bent without cracking through an angle of 90 over a former with a radius equal to six times the nominal thick
17、ness of the strip.blankBS 2S 513:1970 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Roya
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