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1、BRITISH STANDARD AEROSPACE SERIES BS TA 40:1971 (Superseding, in part, D.T.D. 5203) Specification for Bar for machining of titanium-aluminium- molybdenum-tin- silicon-carbon alloy (Tensile strength 12051375 N/mm2) (Limiting ruling section over 25 mm up to and including 75 mm) UDC 629.7:669.295.57128
2、6782784-422.2.018.23 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 40:1971 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of
3、 the Executive Board of the Institution on 30 September 1971 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/49 Draft for comment 67/20619 ISBN 0 580 06845 5 A British Standard does not purport to include all the necessary provisions of a contrac
4、t. 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, page 1 and a back cover. This stan
5、dard 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 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09
6、 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 40:1971 BSI 02-2000i Contents Page 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Condition1 5Heat treatment1 6Mechanical properties1 Licensed Copy: London South Bank University, London South Bank University, Sat De
7、c 09 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 40:1971 BSI 02-20001 NOTEOther forms of material of this composition are covered by the fo
8、llowing British Standards: Tensile strength 1 2501 420 N/mm2: limiting ruling section 25 mm BS TA 38, Bar for machining. BS TA 39, Forging stock. Tensile strength 1 2051 375 N/mm2: limiting ruling section over 25 mm up to and including 75 mm BS TA 41, Forging stock. BS TA 42, Forgings. 1 Inspection
9、and testing procedure This British Standard shall be used in conjunction with Sections 1 and 2 of BS TA 100. 2 Manufacture The material shall be made from ingots produced by consumable electrode melting. 3 Chemical composition The chemical composition of the material shall be: 4 Condition Unless oth
10、erwise stated on the order or Inspection Schedule, the material shall be supplied fully heat treated and either centreless ground or machined. 5 Heat treatment The material and test samples shall be heat treated as follows: 1) heat at a temperature of 900 10 C and hold for one hour per 25 mm of sect
11、ion, with a minimum of 20 min; 2) cool in air; 3) heat at a temperature of 500 5 C and hold for 24 h; 4) cool in air. 6 Mechanical properties 6.1 Tensile test. The mechanical properties obtained from test pieces selected, prepared and tested in accordance with the relevant requirements of BS TA 100
12、shall be: Element % min.max. Aluminium Molybdenum Tin Silicon Iron Hydrogen Oxygen Nitrogen Carbon Titanium 3.0 3.0 3.0 0.3 0.05 5.0 5.0 5.0 0.7 0.20 0.0125 0.25 0.05 0.20 Remainder 0.2 % proof stress Tensile strengthElongation Reduction of area min.min.max.min.min. N/mm2N/mm2N/mm2% 1 0651 2051 3758
13、20 NOTE1 N/mm2= 1 MN/m2= 0.102 kgf/mm2= 0.1 hbar = 0.065 tonf/in2. Information on SI units is given in BS 3763, “The International System of units (SI)” and BS 350, “Conversion factors and tables”. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:04 GMT+00:
14、00 2006, Uncontrolled Copy, (c) BSI BS TA 40:1971 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 incorpor
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22、es not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details 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 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI