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1、BRITISH STANDARD AEROSPACE SERIES BS TA 50:1973 (Superseding, in part, BS TA 36) Incorporating Amendment No. 1 Specification for Forging stock of titanium-aluminium- molybdenum-tin-silicon alloy (Tensile strength 10001200 N/mm2) (Limiting ruling section over 100 mm up to and including 150 mm) UDC 62
2、9.7:669.295.571286782.018.26 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the auth
3、ority of the Executive Board on 2 February 1973 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/49 Draft for comment 71/33667 ISBN 0 580 07038 7 A British Standard does not purport to include all the necessary provisions of a contract. Users of B
4、ritish 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, pages 1 and 2, an inside back cover and a back
5、cover. This standard 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.Date of issueComments 3431December 1980 Indicated by a sideline in the margin Lice
6、nsed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 BSI 02-2000i Contents Page 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Condition1 5Heat treatment1 6Mechanical properties2
7、Appendix A British Standards covering other forms of material of similar compositionInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London
8、 South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 BSI 02-20001 NOTEOther forms of material of similar composition are covered by British Standards as listed in Appendix A. 1 Inspection and testing procedure This British Standard shall be used in con
9、junction with Sections 1 and 3 of BS TA 100. 2 Manufacture The material shall be made from ingots produced, by consumable electrode melting, from materials having a total carbon content of not more than 0.08 %. 3 Chemical composition The chemical composition of the material shall be: 4 Condition 4.1
10、 The material shall be supplied as forged, hot rolled or extruded and may be stress relieved at the discretion of the manufacturer. NOTEStress relieving is achieved by heating the material uniformly for not more than 3 h at a temperature between 600 C and 700 C. 4.2 Unless otherwise stated on the dr
11、awing, order or Inspection Schedule, the material shall be supplied either centreless ground or machined. 5 Heat treatment Test samples taken from the material shall be heat treated as follows: 1) heat at a temperature of 900 10 C and hold for 1 h per 25 mm of section, with a minimum of 20 min; 2) c
12、ool in air; 3) heat at a temperature of 500 5 C and hold for 24 h; 4) cool in air. Element % min.max. Aluminium Molybdenum Tin Silicon Iron Hydrogen Oxygen Nitrogen Oxygen + 2 nitrogen Titanium 3.0 3.0 1.5 0.3 5.0 5.0 2.5 0.7 0.20 0.010 0.25 0.03 0.27 Remainder Licensed Copy: London South Bank Unive
13、rsity, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 2 BSI 02-2000 6 Mechanical properties 6.1 The mechanical properties obtained from test pieces selected, prepared and tested in accordance with the relevant requirements of BS TA 100 shal
14、l be: 6.1.1 Tensile test at room temperature 6.1.2 Creep test. When required and stated on the drawing, order or Inspection Schedule: Maximum total plastic strain in 100 h under a load of 465 N/mm2 at 400 C: 0.10 %. NOTE1 N/mm2= 1 MN/m2= 1 MPa = 0.1 h bar = 0.065 tonf/in2. Information on SI units is
15、 given in BS 3763, “The International System of units (SI)”, and BS 350, “Conversion factors and tables”. Dimensions of test sample at heat treatment stage 0.2 % proof stressTensile strengthElongation Reduction of area min.min.max.min.min. N/mm2N/mm2N/mm2% In full ruling section from over 100 mm up
16、to and including 150 mm8701 0001 200920 12.5 mm thick slice prepared by machining or forging9601 1001 280920 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 BSI 02-2000 Appendix A British Standard
17、s covering other forms of material of similar composition Tensile strength (N/mm2) min.1 1001 0501 0501 0501 000 max.1 2801 2201 2201 2001 200 Limiting ruling section (mm) Over25100 Up to and including25100100100150 FormBritish Standard Bar and section for machining Forging stock Forgings BS TA 45BS
18、 TA 46 BS TA 47 BS TA 48 BS TA 49 BS TA 51 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS TA 50:1973 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent nationa
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27、ese 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 03:02:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
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