1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED SEPTEMBER 1985 BS L 513:1973 (Superseding BSL502) Specification for Forging stock and forgings of magnesium 6% aluminium-zinc alloy (Al 6.0, Zn 1.0) UDC 629.7:669.721.5715 134:621.73BSL513:1973 This British Standard, having been approved by the AerospaceIn
2、dustry Standards Committee, was published underthe authority of the Executive Board on 15 March 1973 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/24 Draft for comment 71/34276 ISBN 0 580 07148 0 A British Standard does not purport to include a
3、ll 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 pages This document comprises a front cover, an inside front cover, pagesi and
4、ii, pages1 and2 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 since publication Amd. No. Date CommentsBSL513:1973 BSI 01-2000 i Contents Page 1
5、 Inspection and testing procedure 1 2 Quality of material 1 3 Chemical composition 1 4 Condition 1 5 Head treatment 1 6 Mechanical properties 2ii blankBSL513:1973 BSI 01-2000 1 NOTEOther forms of material of this composition are covered by the following British Standards: BS L 503, Tube. BS L 512, B
6、ars and extruded sections. 1 Inspection and testing procedure This British Standard shall be used in conjunction with the relevant sections of BSL500 as follows: 2 Quality of material The material shall be made from magnesium and alloying constituents, with or without approved scrap at the discretio
7、n of the manufacturer. 3 Chemical composition The chemical composition of the material shall be: 4 Condition 4.1 Forging stock. Unless otherwise stated on the order, forging stock shall be supplied as-extruded or as-extruded and straightened. 4.2 Forgings. Unless a particular condition is required b
8、y the order, forgings shall be supplied in one of the following conditions, at the discretion of the manufacturer: 1) As-forged, 2) Forged and stress relieved. NOTEStress relieving is achieved by heating the forgings for not more than3h at a temperature not exceeding300 C. 5 Heat treatment None. Cas
9、t billets and slabs for hot working Sections 1 and 2 Bars and extruded sections for forging Sections 1 and 3 Forgings Sections 1 and 5 Element % min. max. Aluminium 5.5 6.5 Zinc 0.5 1.5 Manganese 0.2 0.4 Copper a 0.1 Silicon a 0.1 Iron a 0.03 Nickel a 0.005 Magnesium Remainder a Subject to the discr
10、etion of the Inspecting Authority, determination of these elements need be made on a small proportion only of the samples analysed.BSL513:1973 2 BSI 01-2000 6 Mechanical properties 6.1 Tensile test. Unless they are required by BSL500to be fixed by agreement between the manufacturer and the purchaser
11、, the mechanical properties of test pieces selected and prepared in accordance with the relevant requirements of BSL500 shall be not less than the following values: Test piece from test samples representing 0.2% proof stress Tensile strength Elongation N/mm 2 N/mm 2 % Bars and extruded sections for
12、forging: Diameter or minor sectional dimension not greater than75mm 180 270 8 Diameter or minor sectional dimension greater than75mm but not greater than150mm 160 250 7 Forgings made from cast billets, bars or extruded sections, and represented by separately forged test bars 160 275 7 NOTE1N/mm 2 =1
13、MN/m 2 =1MPa=0.065tonf/in 2 . Information on SI units is given in BS3763, “The International System of units (SI)”, and BS350, “Conversion factors and tables”.blankBS L 513:1973 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible f
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