1、BRITISH STANDARD AEROSPACE SERIES BS L 118: 1975 Incorporating Amendment Nos. 1 and 2 Specification for Tube of aluminium- magnesium-silicon- copper-chromium alloy (Solution treated and artificially aged: tested hydraulically) (Not exceeding 10 mm thickness) (Mg 1.0, Si 0.6, Cu 0.28, Cr 0.2) UDC 629
2、.7:669.715721782326 462 153.71 157.84BSL118:1975 This British Standard, having been approved by the AerospaceIndustry Standards Committee, was published underthe authority of the Executive Board on 30May1975 BSI 01-2000 The following BSI references relate to the work on this standard: Committee refe
3、rence ACE/24 Draft for comment 73/35606 DC ISBN 0 580 08942 8 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 fro
4、m legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, 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 the amendme
5、nt table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 3829 March 1982 5995 August 1988 Indicated by a sideline in the marginBSL118:1975 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Quality of material 1 3 Chemical composition 1
6、4 Condition 1 5 Heat treatment 1 6 Mechanical properties 2 7 Tolerances 3 8 Non-destructive testing 3 Table 1 Tolerances on thickness 3 Table 2 Tolerances on outside or inside diameters of drawn round tube 3 Publications referred to Inside back coverii blankBSL118:1975 BSI 01-2000 1 NOTE 1Tube of si
7、milar composition and in the same heat treatment condition, but not tested hydraulically, is covered by BSL117. NOTE 2The chemical composition of this material complies with that registered as International Designation 6061. 1 Inspection and testing procedure 1.1 This British Standard shall be used
8、in conjunction with sections 1 and 11, and the requirements relating to the single drifting test in section 10, of the latest issue of BSL100, except as specified in6.2 and clause7 below. 1.2 The tube shall be seamless and uniform in quality. Both exterior and interior surfaces shall be clean and fr
9、ee from harmful defects including, but not limited to, slivers, folds, laminations, grooves and cracks. 2 Quality of material The material shall be made from aluminium and alloying constituents, with or without approved scrap at the discretion, on of the manufacturer. 3 Chemical composition The chem
10、ical composition of the material shall be: 4 Condition The material shall be supplied solution treated and artificially aged. 5 Heat treatment The material shall be heat treated as follows: a) solution treat by heating uniformly at a temperature between510 C and540 C and quenching in water at a temp
11、erature not exceeding40 C; b) artificially age by heating uniformly at a temperature between165 C and195 C for3h to12h. Element % min. max. Silicon 0.40 0.8 Iron 0.7 Copper 0.15 0.40 Manganese 0.15 Magnesium 0.8 1.2 Chromium 0.04 0.35 Zinc a 0.25 Titanium a 0.15 Others: each a 0.05 Others: total a 0
12、.15 Aluminium Reminder 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.BSL118:1975 2 BSI 01-2000 6 Mechanical properties 6.1 Tensile test. The mechanical properties obtained from test pieces sele
13、cted 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 BS 3763 “The International System of units (SI)” and BS 350 “Conversion factors and tables”. 6.2 Flattening test. The specified number of tube
14、s shall be subjected to the flattening test, in accordance with the requirements of BSL100 except that hammer blows shall not be used. The distance between the inner sides of the test piece after flattening shall not exceed the following values: 6.3 Single drifting test. 10% of tubes shall be subjec
15、ted to the single drifting test. 6.4 Hydraulic distention test. One sample of tube at least500mm long in each batch shall be tested to the appropriate pressure determined from the following formula: pressure (MPa) = 240 where D is the maximum outside diameter (i.e.nominal outside diameter plus ovali
16、ty tolerance); d is the maximum inside diameter (i.e.D minus twice the minimum thickness at any point). The sample tube shall not burst, nor show a permanent increase in mean diameter greater than0.2%. Examples of the application of this formula are given in the following table. Nominal thickness 0.
17、2% proof stress Tensile strength Elongation on gauge length of 50 mm Full tube section Strip test piece mm MPa (= N/mm 2 ) MPa (= N/mm 2 ) % % Over Up to and including 1.0 240 290 10 8 1.0 5.0 240 290 12 10 5.0 10.0 240 290 14 12 Ratio of thickness (T) to outside diameter (OD) (T/OD) Maximum distanc
18、e Equal to or less than 0.1 6T Greater than 0.1 0.9 OD 2T Nominal outside diameter Nominal thickness (mm) 0.4 0.5 0.6 0.8 1.0 1.2 1.6 2.0 2.5 Test pressure (MPa) mm 3.2 50.2 67.4 85.2 5 31.7 42.4 53.2 76.0 8 20.0 26.0 32.6 46.1 58.7 12 17.3 21.5 30.2 38.2 46.4 20 10.2 12.7 17.7 22.3 27.0 36.6 46.5 5
19、9.2 D 2 d 2 D 2 + d 2 -BSL118:1975 BSI 01-2000 3 6.5 Text deleted. 7 Tolerances 7.1 Thickness. The thickness of the tube shall comply with the requirements ofTable 1. 7.2 Diameter. The diameters of drawn round tube shall comply with the requirements ofTable 2. Table 1 Tolerances on thickness Table 2
20、 Tolerances on outside or inside diameters of drawn round tube 8 Non-destructive testing Each length of tube shall be tested in accordance with the method specified in ASTM E215-67 along its length for internal and external surface defects. Defect indications shall be less than from a 2A hole. All d
21、imensions in millimetres Nominal thickness Mean thickness atolerance Eccentricity b Over Up to and including 0.25 0.90 0.05 0.90 1.25 0.08 0.08 or 10% of nominal thickness, whichever is the greater 1.25 2.10 0.10 2.10 3.05 0.13 3.05 5.15 0.15 5.15 7.60 0.20 7.60 9.50 0.38 a Mean thickness: the sum o
22、f the thicknesses measured at the ends of any two diameters at right angles, divided by four. b Eccentricity: allowable deviation of the thickness, at any point, from the nominal thickness. All dimensions in millimetres Nominal outside or inside diameter Deviation of mean diameter afrom nominal Oval
23、ity b Over Up to and including 13.0 0.08 0.15 13.0 25.5 0.10 0.20 25.5 51.0 0.13 0.25 51.0 76.5 0.15 0.30 76.5 127.0 0.20 0.40 127.0 155 0.25 0.50 a Mean diameter: half the sum of any two diameters at right angles. b Ovality: allowable deviation of the diameter, at any point, from the nominal diamet
24、er. 4 blankBSL118:1975 BSI 01-2000 Publications referred to BS L 100, Procedure for inspection and testing of wrought aluminium and aluminium alloys. ASTM E215-67, Standardizing equipment for electromagnetic testing of seamless aluminium alloy tube. BS L 118: 1975 BSI 389 Chiswick High Road London W
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