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1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED MAY 1980 BS L 112:1971 Specification for Forging stock and forgings of aluminium- magnesium-silicon- manganese alloy (Solution treated and precipitation treated) (Suitable for welding) (Mg 0.8, Si 1, Mn 0.7) UDC 629.7:669.71578272174-134 Licensed Copy: Lon
2、don South Bank University, London South Bank University, Sat Dec 09 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 112:1971 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of the Executive Board of the Institution
3、 on 30 September 1971 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 70/19819 ISBN 0 580 06775 0 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respo
4、nsible 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 copyr
5、ight 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 02:55:44 GMT+00:00 2006, Uncont
6、rolled Copy, (c) BSI BS L 112:1971 BSI 01-2000i Contents Page 1Inspection and testing procedure1 2Quality of material1 3Chemical composition1 4Condition1 5Heat treatment1 6Mechanical properties2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:44 GMT+00:00
7、2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 112:1971 BSI 01-20001 NOTEOther forms of material of similar composition and in the same heat treatment condition a
8、re covered by the following British Standards: BS L 111, Bars and extruded sections. BS L 113, Sheet and strip. BS L 114, Tube. BS L 115, Plate (controlled stretched). 1 Inspection and testing procedure This British Standard shall be used in conjunction with the relevant sections of BS L 100 as foll
9、ows: 2 Quality of material The material shall be made from aluminium and alloying constituents, with or without approved scrap, at the discretion of the manufacturer. 3 Chemical composition The chemical composition of the material shall be: 4 Condition 4.1 Forging stock. Cast billets and slabs for h
10、ot working and extruded bars, sections and hot-rolled plate for forging shall be supplied non-heat treated. 4.2 Forgings. Unless otherwise agreed in accordance with BS L 100, Section 7, forgings shall be supplied solution treated and precipitation treated. 5 Heat treatment The forgings shall be heat
11、 treated as follows: 1) Solution treat by heating uniformly at a temperature between 510 C and 540 C and quenching in water at a temperature not exceeding 70 C. 2) Precipitation treat by heating uniformly at a temperature between 165 C and 195 C for 3 hours to 12 hours. Cast billets and slabs for ho
12、t workingSections 1 and 2 Extruded bars and sections for forgingSections 1 and 3 Hot-rolled plate for forgingSections 1 and 13 ForgingsSections 1 and 7 Element % min.max. Copper0.10 Magnesium0.51.2 Silicon0.71.3 Iron0.5 Manganese0.41.0 Nickela0.10 Zinca0.2 Leada0.05 Tina0.05 Titanium and/or other gr
13、ain refining elementsa0.2 Chromiuma0.25 AluminiumThe remainder a Subject to the discretion of the Inspecting Authority, determination of these elements need be made on a small proportion only of the samples analysed. Licensed Copy: London South Bank University, London South Bank University, Sat Dec
14、09 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 112:1971 2 BSI 01-2000 6 Mechanical properties 6.1 Tensile test. Unless they are required by BS L 100 to be fixed by agreement between the manufacturer and the purchaser, the mechanical properties obtained from test pieces selected and prep
15、ared in accordance with the relevant requirements of BS L 100 shall be not less than the following values: 6.2 Hardness test. The Brinell hardness number of forgings and of forged test pieces heat treated in accordance with Clause 5 shall be not less than 90. Material represented Test sample prepare
16、d by Diameter or minor sectional dimension of forging stock 0.2 % proof stress Tensile strength Elongation on gauge length of 5.65 mmN/mm2N/mm2% Extruded forging stock Forgings made from: Cast billets Hot-rolled plate Extruded stock FAll sizes2552958 OverUp to and including Extruded forging stockM 2
17、0 150 20 150 200 255 270 240 295 310 280 8 8 5 M = machiningF = forging 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”. So Licensed Copy: London South Ba
18、nk University, London South Bank University, Sat Dec 09 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 112:1971 BSI 389 Chiswick High Road London
19、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 incorporated by Royal Charter. Revisions British Standards are updated by amendment or revis
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26、tents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessa
27、ry 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 02:55:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
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