1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED APRIL 1999 BS L 168:1978 (Superseding BS 3L 65) Incorporating Amendment No. 1 Specification for Bars and extruded sections of aluminium copper magnesium silicon manganese alloy (Solution treated and artificially aged) (Not exceeding 200mm diameter or minor
2、 sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7, Mn 0.8) UDC 629.7:669.715372178274 42 153.71 157.84BSL168:1978 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published under the authorityofthe Executive Boardon 29December1978 BSI 01-2000 The f
3、ollowing BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 78/71606 DC ISBN 0 580 10604 7 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
4、. 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 copyright date) and may have had amendmen
5、ts incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 7876 August 1993 Indicated by a sideline in the marginBSL168:1978 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Quality o
6、f material 1 3 Chemical composition 1 4 Condition 1 5 Heat treatment 1 6 Mechanical properties 2 7 Identification 2ii blankBSL168:1978 BSI 01-2000 1 NOTEThe chemical composition of this material complies with that registered as International Designation2014A. 1 Inspection and testing procedure This
7、British Standard shall be used in conjunction with the relevant sections of the latest issue 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 T
8、he chemical composition of the material shall be: 4 Condition 4.1 Bars and extruded sections (temper designationT6). Unless otherwise agreed and stated on the order in accordance with BSL100, section5, the material shall be supplied solution treated in accordance with5.1, straightened and subsequent
9、ly artificially aged in accordance with5.2. 4.2 Bars and extruded sections (temper designation T651). Unless otherwise agreed and stated on the order in accordance with section5 of BSL100, the material shall be supplied solution treated in accordance with5.1, controlled stretched and subsequently ar
10、tificially aged in accordance with5.2. Unless otherwise stated on the order, it may be straightened after controlled stretching. 4.3 Bars and extruded sections for highly stressed structures (temper designation T651). Unless otherwise agreed and stated on the order in accordance with BSL100, section
11、6, the material shall be supplied solution treated in accordance with5.1, controlled stretched and subsequently artificially aged in accordance with5.2. Unless otherwise stated on the order, it may be straightened after controlled stretching. 5 Heat treatment 5.1 Solution treatment. The solution tre
12、atment shall consist of heating at a temperature of505 5 C and quenching in water at a temperature not exceeding40 C. 5.2 Artificial ageing. Artificial ageing shall consist of heating at a temperature of175 5 C for5h to12h. Bars for machining and extruded sections sections 1 and 5 Bars for machining
13、 and extruded sections for highly stressed structures sections 1 and 6 Element % min. max. Silicon 0.50 0.9 Iron 0.50 Copper 3.9 5.0 Manganese 0.40 1.2 Magnesium 0.20 0.8 Chromium a 0.10 Nickel a 0.10 Zinc a 0.25 Titanium a 0.15 Titanium plus zirconium a 0.20 Others: each 0.05 Others: total 0.15 Alu
14、minium Remainder a Subject to the discretion of the Quality Assurance Authority, determination of these elements need be made on a small proportion only of the samples analysed.BSL168:1978 2 BSI 01-2000 6 Mechanical properties Tensile test. Unless they are required by BSL100 to be fixed by agreement
15、 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 following values. NOTEInformation on SI units is given in BS3763 “The International System of units
16、 (SI)” and BS350 “Conversion factors and tables”. 6.1 Hardness test. The value of X shall be as shown in the following table. 7 Identification The material shall be identified as follows. a) Material supplied as specified in 4.1: BS L168 T6. b) Material supplied as specified in 4.2 or 4.3, not strai
17、ghtened after controlled stretching: BSL168 T6510. c) Material supplied as specified in 4.2 or 4.3, straightened after controlled stretching: BSL168 T6511. Diameter or minor sectional dimension of the bar or extruded section 0.2% proof stress Tensile strength Elongation on gauge length of 50 mm 5.65
18、 mm MPa (= N/mm 2 ) MPa (= N/mm 2 ) % % Over Up to and including 2.5 370 415 6 7 2.5 10 385 435 6 7 10 25 415 460 7 25 75 440 490 7 75 100 435 480 7 100 150 420 465 7 150 200 390 435 7 Tensile strength of test piece a Value of X MPa % f t to less than f t+ 15 5 f t+ 15 to less than f t+ 30 7.5 f t+
19、30 to less than f t+ 45 10 f t+ 45 and over 12.5 a f t= minimum value for the particular size of material as specified in. S oblankBS L 168:1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It
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