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1、BRITISH STANDARD AEROSPACE SERIES BS L 169:1986 Incorporating Amendment No. 1 Specification for Ingots and castings of aluminium-silicon- magnesium alloy (solution treated and artificially aged) (Si 7, Mg 0.6) UDC 629.7:669.715782721 153.71 157.84 BS L 169:1986 This British Standard, having been pre
2、pared under the direction of the Aerospace Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1986 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 82/79983 DC ISBN 0
3、 580 15003 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/24, upon which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association A
4、ssociation of Light Alloy Refiners Limited BNF Metals Technology Centre British Forging Industry Association British Industrial Fasteners Federation British Investment Casting Trade Association Institute of British Foundrymen Light Metal Founders Association Magnesium Industry Council Ministry of De
5、fence Society of British Aerospace Companies Limited Amendments issued since publication Amd. No.Date of issueComments 6547December 1990 Indicated by a sideline in the margin BS L 169:1986 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Inspection and testing
6、procedure1 3Chemical composition1 4Conditions of supply1 5Heat treatment1 6Mechanical properties of castings1 Table 1 Chemical composition of ingots and castings1 Table 2 Tensile properties of separately cast samples1 Table 3 Tensile properties of cut-up and integrally cast test samples2 Publication
7、 referred toInside back cover BS L 169:1986 ii BSI 02-2000 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Committee. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
8、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 cover. This standard has been upd
9、ated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. BS L 169:1986 BSI 02-20001 1 Scope This British Standard specifies the inspection and testing procedure, chemical composition, heat treatment and mechanical pr
10、operties applicable to ingots and castings of aluminium-silicon-magnesium alloy. NOTE 1The title of the publication referred to in this standard is given on the inside back cover. NOTE 2The latest revision of an Aerospace Series standard is indicated by a prefix number. 2 Inspection and testing proc
11、edure The inspection and testing procedure shall be as specified in the relevant sections of BS 3L 101 as follows: 3 Chemical composition 3.1 The chemical composition of ingots and castings shall be as given in Table 1. Table 1 Chemical composition of ingots and castings 3.2 Grain refinement shall b
12、e carried out using titanium and boron. 3.3 The release documentation for ingots shall include a statement of grain refining elements used, if any. 4 Conditions of supply 4.1 Ingots shall be supplied as cast. 4.2 Castings shall be supplied fully heat treated in accordance with clause 5 unless otherw
13、ise stated on the order. 5 Heat treatment 5.1 The castings and test samples shall be heat treated together in accordance with a) to d) as follows. a) Solution treat at a temperature of 540 5 C for not less than 10 h. b) Quench in water or in a polymer quenchant at a temperature not greater than 30 C
14、. NOTEThe use of a polymer quenchant as an alternative to water should be agreed by the purchaser. c) Artificially age at a temperature in the range 155 C to 165 C for not less than 2 h. The temperature selected shall be maintained within a tolerance of 5 C. d) Cool in air. 5.2 Where a polymer quenc
15、hant has been used in 5.1 b), the nature of the quenchant shall be defined on the certificate of conformity for the castings. 6 Mechanical properties of castings 6.1 Tensile tests 6.1.1 The mechanical properties obtained from separately cast test samples, selected and prepared in accordance with the
16、 relevant requirements of BS 3L 101, shall be not less than those given in Table 2, when heat treated in accordance with clause 5. Table 2 Tensile properties of separately cast samples 6.1.2 The mechanical properties obtained from cut-up and integrally cast test samples, heat treated in accordance w
17、ith clause 5, and selected and prepared in accordance with the relevant requirements of BS 3L 101 shall be not less than those given in Table 3 or shall be as stated on the drawing for the casting or on the Inspection Schedule in accordance with BS 3L 101. IngotsSections 1 and 2 Castings not subject
18、 to cut-up testing Sections 1 and 3 Castings subject to cut-up testing Sections 1 and 4 Element Composition by mass Min.Max. Copper Magnesium Silicon % 0.50 6.5 % 0.10 0.75 7.5 Iron Ingots0.15 Castings 0.20 Manganese Nickel Zinc Lead Tin Titanium Beryllium Others each Others total Aluminium 0.10 0.1
19、0 0.05 0.10 0.05 0.05 0.20 0.07 0.05 0.15 Remainder NOTESpecific modifying elements may be added in sufficient quantities to provide the necessary casting material quality. Test sample 0.2 % proof stress min. Tensile strength min. Elongation min. Sand Investment cast Chill cast MPa 240 240 240 MPa 2
20、90 300 320 % 3.0 3.5 4.0 BS L 169:1986 2 BSI 02-2000 6.2 Hardness test The hardness of castings, heat treated in accordance with clause 5 shall be not less than the following: Table 3 Tensile properties of cut-up and integrally cast test samples a) sand and investment cast80 HB, b) chill cast85 HB.
21、Casting thickness Location of test samples 0.2 % proof stress min. Tensile strength min. Elongation Less than 5 Designated locations MPa 250 MPa 320 % 5 Other locations 2303003 5 to 20Designated locations 2403003 Other locations 2202702 20 and above As stated on the drawing for the casting or on the
22、 Inspection Schedule BS L 169:1986 BSI 02-2000 Publication referred to BS 3L 101, Procedure for inspection and testing of aluminium-base and magnesium-base ingots and castings. BS L 169:1986 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national bo
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