1、BRITISH STANDARD AEROSPACE SERIES BS4L56:1986 (Superseding BS3L56) Incorporating Amendment No.1 Specification for Tube of aluminium 2! % magnesium alloy (Temper designation0) (Seamless:tested hydraulically) (Not exceeding12mm wall thickness) UDC 629.7:669.715721-462BS4L56:1986 This BritishStandard,
2、having been prepared under the directionof the Aerospace Standards Committee, was published under the authorityofthe Board of BSI andcomes into effect on 28February1986 BSI 02-2000 The following BSI references relate to the work on this standard: Committee referenceACE/24 Draft for comment81/77624DC
3、 ISBN 0 580 14847 5 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Aerospace Standards Committee(ACE/-) to Technical Committee ACE/24 upon which the following bodies were represented: Aluminium Federation Aluminium Stockholders Associatio
4、n Association 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
5、 Defence Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date of issue Comments 5993 August1988 Indicated by a sideline in the marginBS4L56:1986 BSI 02-2000 i Contents Page Committees responsible Inside front cover 1 Inspection and testing procedure 1 2 Qu
6、ality of material 1 3 Chemical composition 1 4 Condition 1 5 Heat treatment 1 6 Mechanical properties 1 7 Non-destructive testing 2 Publication referred to Inside back coverBS4L56:1986 ii BSI 02-2000 NOTE 1Other forms of material of similar composition are covered by the following BritishStandards:
7、BSL44, Forging stock, bars, extruded sections and forgings. BSL80, Sheet and strip (Temper designation0). BSL81, Sheet and strip (Temper designation H16 or H26). NOTE 2The chemical composition of this material complies with that registered as International Designation5251. NOTE 3The title of the pub
8、lication referred to in this standard is listed on theinside back cover. 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 i
9、mmunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in th
10、e amendment table on the inside front cover.BS4L56:1986 BSI 02-2000 1 1 Inspection and testing procedure This BritishStandard shall be used in conjunction with the relevant sections of the latest issue of BSL100. 2 Quality of material The material shall be made from aluminium of the chemical composi
11、tion specified in clause3, with or without approved scrap at the discretion of the manufacturer. NOTEIn the manufacture of this tube, the use of bridge or port dies is prohibited. 3 Chemical composition The chemical composition of the material shall be: 4 Condition The tube shall be supplied softene
12、d and suitable for manipulation. 5 Heat treatment None. 6 Mechanical properties 6.1 Tensile test. The mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of BSL100 shall be: 6.2 Single drifting test. The specified percentage of the tubes
13、 shall be subjected to the single drifting test. 6.3 Hydraulic distention test. One sample of the tube at least500mm long in each batch shall be tested to the appropriate pressure determined from the following formula, subject to a maximum of27.6MPa and a minimum of1.4MPa: The sample tube shall not
14、burst, nor show a permanent increase in mean diameter greater than0.2%. Element % min. max. Silicon Iron Copper Manganese Magnesium Chromium Zinc a Titanium a Others: each Others: total Aluminium 0.10 1.70 0.40 0.50 0.15 0.50 2.40 0.15 0.15 0.15 0.05 0.15 Remainder a Subject to the discretion of the
15、 Quality Assurance Authority, determination of these elements need be made on a small proportion only of the samples analysed. 0.2% proof stress Tensile strength Elongation on gauge length of50mm min. min. max. min. MPa MPa MPa % 60 160 200 18 PressureMpa ()130 Nominal wall thickness Nominal outside
16、 diameter - =BS4L56:1986 2 BSI 02-2000 Examples of the application of this formula are given in the following table: 6.4 Bore test. The tube shall be subjected to the bore test. 7 Non-destructive testing Each length of tube shall be tested in accordance with the method specified in ASTME215-67 along
17、 its length for internal and external surface defects. Defect indications shall be less than from a2A hole. Nominal outside diameter Nominal wall thickness(mm) 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.6 Test pressure(MPa) mm 3.2 4 5 10 14 20 25 30 50 100 12.2 9.8 7.8 3.9 2.8 2.0 1.6 1.4 1.4 1.4 16.3 13.0 10.4
18、5.2 3.7 2.6 2.1 1.7 1.4 1.4 20.3 16.3 13.0 6.5 4.6 3.3 2.6 2.2 1.4 1.4 24.4 19.5 15.6 7.8 5.6 3.9 3.1 2.6 1.6 1.4 27.6 26.0 20.8 10.4 7.4 5.2 4.2 3.5 2.1 1.4 27.6 27.6 26.0 13.0 9.3 6.5 5.2 4.3 2.6 1.4 27.6 27.6 27.6 15.6 11.2 7.8 6.2 5.2 3.1 1.6 27.6 27.6 20.8 14.9 10.4 8.3 7.0 4.2 2.1BS4L56:1986 B
19、SI 02-2000 Publication referred to BSL100, Procedure for inspection and testing of wrought aluminium and aluminium alloys. ASTME215-67, Standardizing equipment for electromagnetic testing of seamless aluminium alloy tube. BS4L56:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstit
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