1、BRITISH STANDARD AEROSPACE SERIES BS2L95:1971 (Superseding BSL95) Incorporating Amendment No.1 Specification for Plate of aluminium- zinc-magnesium- copper-chromium alloy (Solution treated, controlled stretched andprecipitation treated) (Zn5.8, Mg2.5, Cu1.6, Cr0.15) UDC629.7:669.7155721326-41BS2L95:
2、1971 This British Standard, having been approved by the AerospaceIndustry StandardsCommittee, waspublished under the authorityofthe Executive Boardof the Institution on 31August 1971 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for co
3、mment 69/27775 ISBN0 580065057 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
4、 pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1and 2 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
5、 since publication Amd. No. Date of issue Comments 6842 November 1991 Indicated by a sideline in the marginBS2L95:1971 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 blankB
6、S2L95:1971 BSI 01-2000 1 NOTE 1This British Standard covers plate, including that which has been forged as an intermediate operation, which is finished by hot or cold rolling. It does not cover forged plate. NOTE 2 If material to this BritishStandard is re-solution treated but not again controlled s
7、tretched, it must be regarded as being in the solution treated and precipitation treated, but not controlled stretched, condition, even though the specified mechanical properties are obtained. Plate of this composition in that condition is covered by BSL96. NOTE 3Aluminium-alloy-coated sheet and str
8、ip of the same basic composition are covered by BSL88. NOTE 4The specified chemical composition and mechanical properties meet the requirements of A.I.C.M.A. Recommendation ALP42. 1 Inspection and testing procedure This British Standard shall be used in conjunction with Sections1 and14 of BSL100. 2
9、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 Except as provided in 4.2, the material shall be s
10、upplied solution treated, controlled stretched, to a permanent extension of not less than1 1 / 2 % nor more than3%, and precipitation treated. 4.2 If agreed between the manufacturer and the purchaser and stated on the order, the material shall be supplied solution treated and controlled stretched to
11、 a permanent extension of not less than1 1 / 2 % nor more than3%. No other alternative condition of supply is permissible. 5 Heat treatment The material shall be heat treated as follows: 1) Solution treat by heating at a temperature of460 10 C and quenching in water at a temperature not exceeding40
12、C. 2) Precipitation treat by heating at a temperature of135 5 C for not less than12hours. Element % min. max. Copper Magnesium Silicon Iron Manganese Nickel a Zinc Lead a Tin a Titanium plus Zirconium a Chromium Aluminium 1.2 2.1 5.1 0.10 2.0 2.9 0.40 0.50 0.30 0.05 6.4 0.05 0.05 0.20 0.25 The remai
13、nder 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.BS2L95:1971 2 BSI 01-2000 6 Mechanical properties 6.1 Tensile test. The mechanical properties obtained from test pieces selected and prepared
14、in accordance with the relevant requirements of BSL100 shall be not less than the following values: Nominal thickness Direction 0.2% proofstress Tensile strength Elongation on gauge length of 50mm 5.65 mm N/mm 2 N/mm 2 % % Over Up to and including 6 12.5 Long transverse 450 530 8 12.5 25 Long transv
15、erse 450 530 6 25 40 Longitudinal Long transverse Short transverse 460 450 420 530 530 490 6 5 2.5 40 63 Longitudinal Long transverse Short transverse 460 440 420 530 510 490 6 5 2.5 63 90 Longitudinal Long transverse Short transverse 430 410 390 510 500 480 5 5 2.5 NOTE1N/mm 2= 1 MN/m 2= 0.102kgf/m
16、m 2=0.1hbar = 0.065tonf/in 2 . Information on SI units is given in BS3763, “The International System of units (SI)”, and in PD5686, “The use of SI units”. See also BS350, “Conversion factors and tables”. S o blankBS2L95:1971 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI
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