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1、BRITISH STANDARD AEROSPACE SERIES BS B 28:1991 Incorporating Amendment Nos. 1 and 2 Specification for Copper-beryllium alloy strip, foil and parts (solution treated (W) and precipitated) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Un
2、controlled Copy, (c) BSI BS B 28:1991 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 June 1991 BSI 02-2000 The following BSI references relate to the wor
3、k on this standard: Committee reference ACE/16 Draft for comment 90/73956 DC ISBN 0 580 19427 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/16, upon which the fo
4、llowing bodies were represented: British Non-ferrous Metals Federation Copper Development Association Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments 7115April 1992 8940December 1995 Indicated by a sideline in the margin Licens
5、ed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 28:1991 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Technical requirements1 Table 1 Technical requirements
6、 for Cu-Be alloy strip, foil and parts (solution treated and precipitated)2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 28:1991 ii BSI 02-2000 Foreword This British Standard has been prepared under the
7、 direction of the Aerospace Standards Policy Committee. WARNING. This British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and in no way absolves either the designer, the prod
8、ucer, the supplier or the user from statutory obligations relating to health and safety at any stage of manufacture or use. 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
9、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, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporat
10、ed. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 28:1991 BSI 02-20001 1 Scope This British Standard specifies the chemical compos
11、ition, mechanical properties and inspection and test requirements for a precipitation hardening copper-beryllium alloy supplied in the form of strip and foil. The material is supplied in the solution treated condition for precipitation treatment after conversion into parts. 2 References This standar
12、d makes reference to the following standards publications: BS B 100, Procedure for inspection, testing and acceptance of wrought copper alloys1). BS 2870, Specification for rolled copper and copper alloys: sheet, strip and foil. BS 5555, Specification for SI units and recommendations for the use of
13、their multiples and of certain other units. BS 5775, Specification for quantities, units and symbols Part 0: General Principles. BS EN 2500, Instructions for the drafting and use of metallic material standards1). 3 Technical requirements 3.1 The technical requirements for material to this standard s
14、hall comply with those specified in Table 1. 3.2 Symbols and units in Table 1 shall be interpreted in accordance with BS 5555, BS 5775-0 or BS EN 2500. 3.3 For the purposes of this standard, a batch is defined as the material of the same nominal cross-sectional dimensions, from the same cast, manufa
15、ctured by the same route and heat treated together. 1) In preparation. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 28:1991 2 BSI 02-2000 Table 1 Technical requirements for Cu-Be alloy strip, foil and p
16、arts (solution treated and precipitated) 1Material designationCuBe1.9 2Chemical composition %ElementBeCo+ Ni Ni+ Co+ Fe AlSiOthersCu min.1.800.20Base max.2.000.60.20 0.20 0.50 3Method of melting 4Form Method of production Limit dimensions (mm) Strip and foil Rolling 0.10 k a k 3.0 55.1 Technical spe
17、cificationSections 1 and 6 of BS B 100 5.2 Dimensional standardSection 6 of BS 2870:1980 66.1 Delivery condition and heat treatment Solution treated 760 C k k 835 C/Quench 6.2 Delivery condition code 7Use condition and heat treatment Solution treated and precipitation treated Delivery condition + 31
18、5 C k k 330 C/t = 3 h/AC Characteristics 8Sampling Test piece Heat treatment Delivery conditionUse condition 9Dimensions concernedmm 10Thickness of cladding on each face % 11Direction of sampleLTL 12 Tensile TemperatureCAmbient temperature 13Proof stressRp0.2MPa U 960 14StrengthRmMPa 410 k Rmk 540 1
19、 140 k Rmk 1 340 15ElongationA%U 35U 3 16Reduction of area Z% 17Hardness90 k HV k 140350 kHV k 400 18Shear strengthRcMPa 19Bendingk0 ( = 90)0 ( = 90) 20Impact strength 21 Creep TemperatureC 22Timeh 23StressaMPa 24Elongationa% 25Rupture stressRMPa 26Elongation at rupture A% Licensed Copy: London Sout
20、h Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 28:1991 BSI 389 Chiswick High Road Lond
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