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1、BRITISH STANDARD AEROSPACE SERIES This Standard is obsolescent. See the BSI Catalogue for details. June 1999 BS L 166:1978 (Superseding BS 2L 89 and BS L 108) Incorporating Amendment No. 1 Specification for Close toleranced sheet and strip of aluminium-coated aluminium-copper- magnesium-silicon- man
2、ganese alloy (Solution treated and aged at room temperature) (Cu 4.4, Mg 0.5, Si 0.8, Mn 0.8) ICS 49.025.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:44 GMT+00:00 2006, Uncontroll
3、ed Copy, (c) BSI BS L 166:1978 This British Standard, having been prepared under the direction of the Aerospace Standards Committee, was published under the authority of the Executive Board on 30 November 1978 BSI 5 April 2002 The following BSI references relate to the work on this standard: Committ
4、ee reference ACE/24 Draft for comment 76/76492 DC ISBN 0 580 10354 4 Summary of pages This document comprises a front cover, an inside front cover, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this docum
5、ent indicates the most recent changes by amendment. Amendments issued since publication Amd. No.Date of issueComments 135715 April 2002Indicated by a sideline Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
6、L 166:1978 BSI 5 April 2002 1 NOTE 1This material, if repeatedly solution treated or annealed, may develop coarse grain and may show pronounced “orange peel” on subsequent manipulation. Also, particularly with thin material, repeated solution treatment will reduce the corrosion resistance and impair
7、 the colour. NOTE 2The chemical compositions of the core and cladding of this material comply with those registered as International Designations 2014A and 1050A respectively. NOTE 3This material is suitable for conversion by the purchaser to other specified heat treatment tempers. 1 Inspection and
8、testing procedure This British Standard shall be used in conjunction with sections 1 and 9 of the latest issue of BS L 100. 2 Quality of material 2.1 The sheet and strip shall consist of a core of the alloy specified in 3.1 coated uniformly on both sides with aluminium of the chemical composition sp
9、ecified in 3.2. The minimum average thickness of the cladding on each side shall be 4 % for material up to and including 1.6 mm thick and 2 % for thicker material. 2.2 The core material shall be made from aluminium and alloying constituents, with or without approved scrap at the discretion of the ma
10、nufacturer. 3 Chemical composition 3.1 Core The chemical composition of the core material shall be: Element% min.max. Silicon0.500.9 Iron0.50 Copper3.95.0 Manganese0.401.2 Magnesium0.200.8 Chromiuma0.10 Nickela0.10 Zinca0.25 Titaniuma0.15 Titanium plus zirconiuma0.20 Others: each0.05 Others: total0.
11、15 AluminiumRemainder 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. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:44 GMT+00:00 2006, Uncont
12、rolled Copy, (c) BSI BS L 166:1978 2 BSI 5 April 2002 3.2 Cladding The chemical composition of the cladding material shall be: 4 Condition The material shall be supplied in one of the following conditions, as stated on the order: a) solution treated in accordance with 5.1, straightened and aged at r
13、oom temperature in accordance with 5.2 (temper designation T4); b) as rolled (temper designation F). NOTEWhen material is solution treated and aged at room temperature by the purchaser, the temper designation is T42. In the case of material supplied in the T4 condition, the amount of cold work neces
14、sary for straightening shall be minimal and shall be limited to that required to produce a flat sheet. 5 Heat treatment 5.1 Solution treatment The solution treatment shall consist of heating at a temperature of 505?5?C for not more than 45 min in salt or 60 min in air, followed by quenching in water
15、 at a temperature not exceeding 40?C. 5.2 Ageing at room temperature The duration of ageing at room temperature shall be not less than 5 days nor more than 10 days. 5.3 Artificial ageing Artificial ageing by the purchaser or by the manufacturer to demonstrate convertibility (see 6.2) shall consist o
16、f heating at a temperature of 175?5?C for 9 h to 12 h. NOTEIf the rate of heating is slow, the time at temperature to give the required properties is reduced. The above time at temperature differs, therefore, from that specified in BS L 167, for the initial artificial ageing by the manufacturer, to
17、take account of the faster rise times to temperature associated with the smaller heating units generally used by purchasers compared with the rise times of the large units used by the material manufacturers. Element% min.max. Silicon0.25 Iron0.40 Copper0.05 Manganese0.05 Magnesium0.05 Zinc0.07 Titan
18、ium0.05 Others: each0.03 Aluminiuma99.50 a To be determined by difference. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 166:1978 BSI 5 April 2002 3 6 Mechanical properties 6.1 Tensile test The mechanica
19、l properties obtained from test pieces selected and prepared in accordance with the relevant requirements of BS L 100 shall be not less than the following values. NOTEInformation on SI units is given in BS 3763 “The International System of units (SI)” and BS 350 “Conversion factors and tables”. 6.2
20、Convertibility NOTEExtreme care should be taken when re-heat treating aluminium-coated materials to minimize diffusion of copper from the core to the cladding with subsequent loss of corrosion resistance and, in severe cases, staining of the surface. 6.2.1 If test samples from the material, delivere
21、d in the condition specified in clause 4 a), are artificially aged in accordance with 5.3 (temper designation T62), the properties shall be capable of meeting the requirements of BS L 167. 6.2.2 If test samples from the material, delivered in the condition specified in clause 4 a), are re-solution t
22、reated in accordance with 5.1 and aged at room temperature in accordance with 5.2 (temper designation T42), the properties shall be capable of meeting the requirements of 6.1. 6.2.3 If test samples from the material, delivered in the condition specified in clause 4 a), are re-solution treated in acc
23、ordance with 5.1 and artificially aged in accordance with 5.3 (temper designation T62), the properties shall be capable of meeting the requirements of BS L 167. 6.2.4 If test samples from the material, delivered as rolled, are solution treated in accordance with 5.1, aged at room temperature in acco
24、rdance with 5.2 and subsequently artificially aged in accordance with 5.3 (temper designation T62), the properties shall be capable of meeting the requirements of BS L 167. 7 Dimensional tolerances The close tolerances on thickness in BS L 100 shall apply. 8 Identification 8.1 The material shall be
25、identified or re-identified as follows. a) Material supplied as specified in clause 4 a): BS L 166 T4. b) Material supplied as specified in clause 4 b): BS L 166 F. c) Material converted in accordance with 6.2.1, 6.2.3 or 6.2.4: BS L 167 T62. d) Material converted in accordance with 6.2.2: BS L 166
26、T42. 8.2 The requirements relating to “all over” marking in BS L 100 shall apply. Nominal thickness0.2 % proof stressTensile strengthElongation on gauge length of 50 mm mmMPaMPa% 0.4 up to and including 1.624038514 Over 1.6 up to and including 6.024539014 Licensed Copy: London South Bank University,
27、 London South Bank University, Sat Dec 09 03:06:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS L 166:1978 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standard
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