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1、BRITISH STANDARD AEROSPACE SERIES OBSOLESCENT DECEMBER 1979 BS T 67:1972 (Superseding in part BS T 55) Incorporating Amendment Nos. 1 and 2 Specification for 18/10 Chromium-nickel corrosion-resisting steel tube (Titanium stabilized: 550 N/mm2) (Weldable) UDC 629.7:669.152624 462:669.018.8 Licensed C
2、opy: London South Bank University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS T 67:1972 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of the Executive Board of the Inst
3、itution on 27 October 1972 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 70/7574 ISBN 0 580 07107 3 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are r
4、esponsible 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 and 2 and a back cover. This standard has been updated (see c
5、opyright 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.Date of issueComments 1895February 1976 3103December 1979 Indicated by a sideline in the margin Licensed Copy: London South Ba
6、nk University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS T 67:1972 BSI 02-2000i Contents Page 1Inspection and testing procedure1 2Process of manufacture1 3Chemical composition1 4Surface dressing1 5Condition1 6Final heat treatment1 7Mechanical pro
7、perties2 8Intercrystalline corrosion2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Unco
8、ntrolled Copy, (c) BSI BS T 67:1972 BSI 02-20001 NOTETube of the same composition for use in the cold drawn condition is covered by BS T 69. Obsolescent (by Amendment No. 2) The need for the material covered by this British Standard has been reviewed and it has been decided that, in the interests of
9、 rationalization, it should be regarded as obsolescent. Its use for new designs is not therefore recommended. The standard will be withdrawn in due course. 1 Inspection and testing procedure 1.1 This British Standard shall be used in conjunction with BS 2T 100, Sections 1 and 3. 1.2 Sulphur printing
10、 or deep etching test. Samples shall be selected in accordance with BS 2T 100, 1.6.2.1. 1.3 The dimensional tolerances shall be in accordance with BS 2T 100, Table 3 or Table 6. 2 Process of manufacture The steel shall be manufactured by an electric process unless otherwise agreed between the manufa
11、cturer and the purchaser in accordance with BS 2T 100, 1.3.1. 3 Chemical composition The steel shall contain: 4 Surface dressing The steel shall be overall dressed in accordance with BS 2T 100, 1.5.1. 5 Condition Tube shall be supplied finally heat treated. 6 Final heat treatment Softening shall be
12、carried out by heating at a temperature between 1 000 C and 1 100 C and cooling in a suitable manner. Element % min.max. Carbon Silicon Manganese Phosphorus Sulphur Chromium Nickel Titanium 0.2 0.5 17.0 9.0 5 carbon content 0.08 1.0 2.0 0.035 0.025 19.0 12.0 0.70 Licensed Copy: London South Bank Uni
13、versity, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS T 67:1972 2 BSI 02-2000 7 Mechanical properties 7.1 The mechanical properties obtained from test pieces selected, prepared and tested in accordance with the relevant requirements of BS 2T 100 sha
14、ll comply with the following: 1) Tensile test. The values in SI units are to be regarded as the standard. 2) Flattening test. The distance between the inner sides of the test piece in the direction of flattening shall be 1T or 0.5 bore diameter whichever is the smaller. 3) Bend test alternative to 2
15、). The test piece shall be closed flat. 7.2 Hardness test. The hardness of the tubes shall be not greater than 197 HB or 205 HV. 8 Intercrystalline corrosion 8.1 Test samples shall be selected in accordance with BS 2T 100, 3.8.1 2). 8.2 The samples shall be tested in accordance with BS 2T 100, 3.8.2
16、 and shall withstand the flattening test in accordance with 7.1 2) or the bend test in accordance with 7.1 3), without exhibiting any evidence of crazing or cracking on the inner or outer surfaces of the tube. 0.2 % proof stressTensile strength N/mm2tonf/in2N/mm2tonf/in2 min.min.min.min. 21013.55503
17、6 NOTE1 N/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”. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006,
18、 Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS T 67:1972 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body res
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27、s 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 03:20:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI