1、BRITISH STANDARD AEROSPACE SERIES BS S 533:1969 Incorporating Amendments Nos. 1 and 2 Specification for chromium-nickel- copper-molybdenum corrosion-resisting steel sheet and strip (precipitation hardening: 1 180/1 370 MPa) UDC 629.7:669.152624328-194:669.14.018.8-41 This Standard is obsolescent. Se
2、e the BSI Catalogue for details. September 1999BS S 533:1969 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of the Executive Board of the Institution on 30 September 1969 BSI 27 May 2003 The following BSI references relate
3、 to the work on this standard: Committee reference ACE/15 Draft for comment 68/22041 ISBN 0 580 05532 9 Amendments issued since publication Amd. No. Date Comments 4257 April 1983 14147 27 May 2003 Indicated by a sidelineBS S 533:1969 BSI 27 May 2003 i Contents Page Foreword ii 1 Inspection and testi
4、ng procedure 1 2 Process of manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Heat treatment 2 7 Mechanical properties 2BS S 533:1969 ii BSI 27 May 2003 Foreword This publication does not purport to include all the necessary provisions of a contract. Users are responsible f
5、or its 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 and 2, an inside back cover and a back cover. The BSI copyright notice disp
6、layed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.BS S 533:1969 BSI 27 May 2003 1 NOTE 1 The specified chemical composition, heat treatment and tensile properties comply with AICMA Recommendation FE PM 65 fo
7、r material heat-treated to a tensile strength of 120/140 kgf/mm 2 . (1 180/1 370 MN/in 2 : 118/137 hbar). NOTE 2 Sheet and strip of the same composition for use at a lower strength level are covered by the latest edition of BS S 532. 1 Inspection and testing procedure 1.1 This British Standard shall
8、 be used in conjunction with the relevant sections of the latest edition ofBSS500. 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 prior to heat treatment shall satisfy the tolerances applicable to hot-rolled sh
9、eet and strip. Material which has been finally cold rolled prior to heat treatment shall satisfy the tolerances applicable to cold-rolled sheet and strip. 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
10、 The material shall be manufactured by an electric process unless otherwise agreed between the manufacturer 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 overall dressed in accordance with
11、 the requirements of the latest edition of BS S 500. 5 Condition 5.1 The material shall be supplied in the solution treated and descaled condition. 5.2 Finished parts shall be supplied finally heat treated. Element % min. max. Carbon 0.04 0.07 Silicon 0.60 Manganese 0.80 1.80 Phosphorus 0.035 Sulphu
12、r 0.025 Chromium 15.3 16.3 Copper 1.40 2.10 Molybdenum 1.20 2.00 Nickel 5.0 5.8 Titanium 0.05 0.15BS S 533:1969 2 BSI 27 May 2003 6 Heat treatment 6.1 Solution treatment. Heat at a temperature within the range 1 000 C to 1 075 C. The time at temperature shall be adequate to ensure that after cooling
13、 in air, the mechanical property requirements of 7.1 are achieved and that those of 7.2 are achieved in the finally heat treated condition. 6.2 Final heat treatment. The final heat treatment of solution treated material shall be: 1) Precipitation treatment: 1st stage. Heat at a temperature of 750 10
14、 C for 2 hours to 4 hours and cool in air. 2) Precipitation treatment: 2nd stage. Cool to a temperature of 0 5 C and hold for not less than 2 hours. 3) Precipitation treatment: final stage. Heat at a temperature of 450 10 C for not less than 2 hours and cool in air. 7 Mechanical properties The mecha
15、nical 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. 7.1 Tests in the solution treated condition 1) Hardness test. The hardness shall be not more than 285 HB or 300 HV. 2) Sing
16、le bend test. The test piece shall be bent without cracking through an angle of 180 over a former with a radius equal to one and a half times the nominal thickness of the sheet or strip. 7.2 Tests in the finally heat treated condition 1) Tensile test. 2) Hardness test. The hardness of the finally he
17、at treated parts shall be: 375 min./429 max. HB; or 400 min./455 max. HV. 0.2 % proof stress Tensile strength Elongation MPa MPa % min. min. max. min. 980 1 180 1 370 6blankBS S 533:1969 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body r
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