1、BRITISH STANDARD AEROSPACE SERIES BS L171:1990 Incorporating Amendment No. 1 Specification for Forgings of aluminium- zinc-magnesium- manganese-copper alloy (supplied as-forged or annealed for subsequent heat treatment) (not exceeding 150 mm diameter or minor sectional dimension) (Zn5.7, Mg 2.7, Mn
2、0.5, Cu0.5)(7014) UDC 629.7:669 134:669715721743.5BSL171:1990 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Board ofBSIandcomes into effect on 31 May 1990 BSI 02-2000 The following BSI references rel
3、ate to the work on this standard: Committee reference ACE/24 Draft for comment 87/75977 DC ISBN 0 580 17955 9 Committees responsible for this BritishStandard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/24, upon
4、 which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association Association of Light Alloy Refiners Ltd. BNF Metals Technology Centre British Forging Industry Association British Industrial Fasteners Federation British Investment Casting Trade Association Instit
5、ute of British Foundrymen Light Metal Founders Association Magnesium Industry Council Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date of issue Comments 6839 November 1991 Indicated by a sideline in the marginBSL171:1990 BSI 02-2000 i
6、Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Technical requirements 1BSL171:1990 ii BSI 01-2000 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and supersedes, in part, DTD 5104A. It is
7、 presented in tabular format. The chemical composition of this material corresponds with International Designation 7014. 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 wit
8、h 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, pages1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated.
9、This will be indicated in the amendment table on the inside front cover.BSL171:1990 BSI 01-2000 1 1 Scope This British Standard specifies the chemical composition, heat treatment, mechanical properties and the inspection and testing procedures applicable to forgings of aluminium-zinc- magnesium-mang
10、anese-copper alloy supplied in the as-forged or annealed condition for use in the solution treated and overaged condition (see note 1 to the table). 2 References This standard makes reference to the following publications. BS 5555, Specification for SI units and recommendations for the use of their
11、multiples and certain other units. BS 5775, Specification for quantities, units, and symbols. BS EN 2500, Guidelines for the preparation and use of standards for metallic materials 1) . BS L100, Procedure for inspection and testing of wrought aluminium and aluminium alloys. BS L172, Specification fo
12、r extruded, rolled or cast forging stock of aluminium-zinc-magnesium- manganese-copper alloy (for the manufacture of forgings to BS L 171) (Zn 5.7, Mg 2.7, Mn 0.5, Cu0.5)(7014). 3 Technical requirements The technical requirements for material to this standard shall comply with those specified in the
13、 table. All material supplied shall comply with the requirements appropriate to its dimensions and condition as specified in the standard given in line5.1 of the table. Symbols and units in the tables shall be interpreted in accordance with BS 5555, BS 5775 or BSEN2500. 1) In preparation.BSL171:1990
14、 2 BSI 01-2000 1 Chemical composition % Element Si Fe Cu Mn Mg Ni Zn Ti + Zr Other Al each total Min. 0.3 0 0.30 2.2 5.2 Base Max. 0.50 0.50 0.7 0.7 3.2 0.10 6.2 0.20 0.05 0.15 2 1 2 3 4 5 6 7 8 3 Method of melting 4 Form Method of production Limit dimensions Forgings Forged from forging stock to BS
15、 L 172 0 a u 150 mm 5 5.1 Technical specification BS L 100 sections 1 and 7 6 6.1 Condition and heat treatment for delivery F 0(1) Annealed 360 u u 410 C/AC 01 (1) Solution treated u 460 10 C/AC 6.2 Delivery condition code F 0 (1) 01 (1) 7 Condition and Heat treatment for use T761 (2) Solution treat
16、ed 460 10 C/WQ in boiling water First artificial age 135 5 C/t W 12 h/AC or raise to Second artificial age 150 5 C/14 t u 18 h/AC 8 Test piece, heat treatment, sampling Forged to a = 30 mm T761 Machined from extruded forging stock to BS L72. T761 Cut from forgings or parts. T761 9 Dimensions concern
17、ed a mm 0 a u 150 0 a u 10 10 a u 75 75 a u 150 0 a u 75 (5) 10 Direction of sample L L L LT ST 12 Tensile Temperature C Room temperature 13 Proof stress R p, 0.2 MPa W 415 W 430 W 450 W 430 W 400 W 380 W 380 14 Strength R m MPa W 480 W 480 W 520 W 490 W 460 W 440 W 440 15 Elongation A % W 7 (3)(4)
18、W 7 (3) W 7 (3)(4) W 7 (4) W 7 (4) W 3 (4) W 2 (4) 98 Notes (1) Alternative conditions if stated on order. (2) Heat treatment to be performed in the machined conditions; as near finished size as practicable. (3) Elongation on L o= 50 mm (4) Elongation on L o= 5.65 S o (5) 75 mm a u 150 mm: propertie
19、s subject to agreement between supplier and purchaser. 99 Typical uses For high strength forgings of low residual stress and improved stress corrosion resistance.blankBS L171:1990 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible
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