1、BRITISH STANDARD AEROSPACE SERIES BS 2S 514:1969 (Superseding BS S 514) Incorporating Amendment No. 1 Specification for carbon-manganese steel sheet and strip (for use in the hardened and tempered condition: 770/1 000 MPa) (suitable for welding) UDC 669.1574 194 41 This Standard is obsolescent. See
2、the BSI Catalogue for detailsBS 2S 514:1969 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 24 February 1969 BSI 30 May 2003 The following references relate to the work on this s
3、tandard: Committee reference ACE/15 Draft for comment 67/13801 ISBN 0 580 05236 2 Amendments issued since publication Amd. No. Date Comments 14155 30 May 2003 Indicated by a sidelineBS 2S 514:1969 BSI 30 May 2003 i Contents Page Foreword ii 1 Inspection and testing procedure 1 2 Process of manufactu
4、re 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Final heat treatment 2 7 Mechanical properties 2BS 2S 514:1969 ii BSI 30 May 2003 Foreword This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Co
5、mpliance 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 displayed in this document indicat
6、es when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.BS 2S 514:1969 BSI 30 May 2003 1 NOTE Sheet and strip of the same composition for use in the softened condition are covered by the latest edition of BS S 515. 1 Inspection and testing pro
7、cedure 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 prior to softening or hardening and tem
8、pering 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 and strip (excluding mild steel). 1.3
9、 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 manufacturer and the purchaser in accor
10、dance 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 material shall be supplied in one of the following conditions
11、 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 Finished parts shall be supplied fin
12、ally heat treated. Element % min. max. Carbon 0.17 0.25 Silicon 0.10 0.35 Manganese 1.3 1.7 Phosphorus 0.040 Sulphur 0.040 Chromium 0.25 Molybdenum 0.10 Nickel 0.40BS 2S 514:1969 2 BSI 30 May 2003 6 Final heat treatment The final heat treatment shall be as follows. 1) Harden in oil or water from a t
13、emperature between 860 C and 880 C. 2) Temper at a temperature of not less than 500 C. 7 Mechanical properties 7.1 Tests in the softened condition 1) Hardness. The hardness of the material shall be not more than 179 HB or 190 HV. 2) Single bend test. The test piece shall be bent without cracking thr
14、ough an angle of 180 over a former with a radius equal to half the nominal thickness of the sheet or strip. 7.2 Tests in the hardened and tempered condition 1) Tensile test. The mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of the
15、latest edition of BS S 500 shall comply with the following table. The values in hectobars are to be regarded as the standard. 2) Hardness test for finally heat treated parts. The hardness of the material shall be: 229 min./302 max. HB; or 240 min./315 max. HV. 0.2 % proof stress Tensile strength Elo
16、ngation on thickness Less than 1.6 mm 1.6 to 2.4 mm Over 2.4 mm MPa MPa % % % min. min. max. min. min. min. 630 770 1 000 8 10 12blankBS 2S 514:1969 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Stand
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