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) (Suitableforwelding) (Mg0.8,Si1,Mn0.7) UDC 629.7:669.71578272174-134BSL112:1971 This British S
2、tandard, having been approved by the AerospaceIndustry StandardsCommittee, was published under the authorityofthe Executive Boardof the Institution on 30September1971 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 70/19819 I
3、SBN 0 580 06775 0 A British Standard does not purport to include all the 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 d
4、ocument comprises a front cover, an inside front cover, pagesi andii, pages1 and2 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. Amendments issued since publicati
5、on Amd. No. Date CommentsBSL112:1971 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Quality of material 1 3 Chemical composition 1 4 Condition 1 5 Heat treatment 1 6 Mechanical properties 2ii blankBSL112:1971 BSI 01-2000 1 NOTEOther forms of material of similar composition and in
6、 the same heat treatment condition are 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 r
7、elevant sections of BSL100 as follows: 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 s
8、tock. Cast billets and slabs for hot 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 BSL100, Section7, forgings shall be supplied solution treated and precipitation treated. 5 Heat treat
9、ment The forgings shall be heat treated as follows: 1) Solution treat by heating uniformly at a temperature between510 C and540 C and quenching in water at a temperature not exceeding70 C. 2) Precipitation treat by heating uniformly at a temperature between165 C and195 C for3hours to12hours. Cast bi
10、llets and slabs for hot working Sections 1 and 2 Extruded bars and sections for forging Sections 1 and 3 Hot-rolled plate for forging Sections 1 and 13 Forgings Sections 1 and 7 Element % min. max. Copper 0.10 Magnesium 0.5 1.2 Silicon 0.7 1.3 Iron 0.5 Manganese 0.4 1.0 Nickel a 0.10 Zinc a 0.2 Lead
11、 a 0.05 Tin a 0.05 Titanium and/or other grain refining elements a 0.2 Chromium a 0.25 Aluminium The 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.BSL112:1971 2 BSI 01-2000 6 Mechanic
12、al properties 6.1 Tensile test. Unless they are required by BSL100 to be fixed by agreement between the manufacturer and the purchaser, the mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of BSL100 shall be not less than the followin
13、g values: 6.2 Hardness test. The Brinell hardness number of forgings and of forged test pieces heat treated in accordance with Clause5 shall be not less than90. Material represented Test sample prepared by Diameter or minor sectional dimension of forging stock 0.2% proof stress Tensile strength Elon
14、gation on gauge length of5.65 mm N/mm 2 N/mm 2 % Extruded forging stock Forgings made from: Cast billets Hot-rolled plate Extruded stock F All sizes 255 295 8 Over Up to and including Extruded forging stock M 20 150 20 150 200 255 270 240 295 310 280 8 8 5 M = machining F = forging NOTE1 N/mm 2 =1MN
15、/m 2 =0.102kgf/mm 2 =0.1hbar=0.065tonf/in 2 . Information on SI units is given in BS3763, “The International System of units (SI)” and BS350, “Conversion factors and tables”. S o blankBS L 112:1971 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nationa
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