BS-L-173-1991.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS L 173:1991 Specification for Castings of aluminium-silicon- magnesium alloy, chill cast (solution treated and precipitation treated to an overaged (T7) condition) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:48 GMT+0
2、0:00 2006, Uncontrolled Copy, (c) BSI BS L 173:1991 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 30 April 1991 BSI 02-2000 The following BSI references re
3、late to the work on this standard: Committee reference ACE/24 Draft for comment 90/72179 DC ISBN 0 580 19390 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/24, up
4、on which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association Association of Light Alloy Refiners Limited BNF Metals Technology Centre British Forging Industry Association British Industrial Fasteners Federation British Investment Casting Trade Association I
5、nstitute of British Foundrymen Light Metal Founders Association Magnesium Industry Council Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03
6、:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 173:1991 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Technical requirements1 Table 1 Technical requirements for chill cast Al-Si-Mg alloy, T7 condition2 Licensed Copy: London South Bank Un
7、iversity, London South Bank University, Sat Dec 09 03:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 173:1991 ii BSI 02-2000 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee. A British Standard does not purport to include all the
8、 necessary provisions of a contract. 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,
9、pages 1 to 3 and a back 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. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:48 GMT+00:
10、00 2006, Uncontrolled Copy, (c) BSI BS L 173:1991 BSI 02-20001 1 Scope This British Standard specifies the inspection and testing procedure, chemical composition, heat treatment and mechanical properties for chill castings of aluminium-silicon-magnesium alloy in an overaged (stabilized) condition. 2
11、 References This standard makes reference to the following publications: BS L 99, Specification for ingots and castings of aluminium-silicon-magnesium alloy (solution treated and precipitation treated) (Si 7, Mg 0.3). BS L 101, Procedure for inspection, testing and acceptance of aluminium-base and m
12、agnesium-base ingots and castings. BS 5555, Specification for SI units and recommendations for the use of their multiples and of certain other units. BS 5775, Specification for quantities, units and symbols Part 0: General principles. BS EN 2500, Instructions for the drafting and use of metallic mat
13、erial standards Part 1: General requirements Part 2: Aluminium, aluminium alloys and magnesium alloys1). 3 Technical requirements 3.1 The castings to this standard shall comply with the technical requirements specified in Table 1. All castings supplied shall comply with requirements appropriate to i
14、ts dimensions and condition as specified in the standard given in line 5.1 of Table 1. 3.2 Symbols and units in Table 1 shall be interpreted in accordance with BS 5555, BS 5775-0 or BS EN 2500. 1) In preparation. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 0
15、3:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 173:1991 2 BSI 02-2000 Table 1 Technical requirements for chill cast Al-Si-Mg alloy, T7 condition 1Material designation 2Chemical composition %ElementSiFeCuMnMgZnTiBeOthers (1)Al min.6.50.25 0.04 eachtotal base max.7.50.20 0.20 0.100.450.100.25
16、0.070.050.15 3Method of melting(2) 4Form Method of production Limit dimensions (mm) Chill cast 55.1 Technical specificationBS L 101 5.2 Dimensional standard 66.1 Delivery condition and heat treatment T7 Solution treat = 540 5 C/t U 12 h Water quench U 65 C (3) Stabilize 215 C k k 230 C/2 h k t k 4 h
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