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1、BRITISH STANDARD AEROSPACE SERIES BS B 33:1991 Incorporating Amendment Nos. 1 and 2 Specification for Copper-beryllium alloy wire and springs (solution treated (W) and precipitated) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontr
2、olled Copy, (c) BSI BS B 33:1991 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 work on
3、this standard: Committee reference ACE/16 Draft for comment 90/73961 DC ISBN 0 580 19432 9 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 followi
4、ng 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 7120April 1992 8945December 1995 Indicated by a sideline in the margin Licensed Co
5、py: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 33:1991 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Technical requirements1 Table 1 Technical requirements for
6、Cu-Be alloy wire and springs (solution treated and precipitated)2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 33:1991 ii BSI 02-2000 Foreword This British Standard has been prepared under the direction
7、 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 producer, the
8、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 with a Bri
9、tish 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 incorporated. This w
10、ill be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 33:1991 BSI 02-20001 1 Scope This British Standard specifies the chemical composition, mec
11、hanical properties and inspection and test requirements for a precipitation hardening copper-beryllium alloy supplied in the form of wire for precipitation treatment after forming into springs. 2 References This standard makes reference to the following standards publications: BS B 100, Procedure fo
12、r inspection, testing and acceptance of wrought copper alloys1). BS 2873, Specification for copper and copper alloys. Wire. BS 5555, Specification for SI units and recommendations for the use of their multiples and of certain other units. BS 5775, Specification for quantities, units and symbols Part
13、 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 shall comply with those specified in Table 1. 3.2 Symbols and units in Table 1 shall be interpreted in acc
14、ordance 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, manufactured by the same route and heat treated together. 3.4 Springs shall be supplied in the solution treated
15、 and precipitation treated condition. 1) In preparation. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 33:1991 2 BSI 02-2000 Table 1 Technical requirements for Cu-Be alloy wire and springs (solution trea
16、ted and precipitated) 1Material designationCuBe1.9 2Chemical composition %ElementBeCo+ Ni Ni+ Co+ Fe AlSiOthersCu min.1.800.20Base max.2.000.60.200.200.50 3Method of melting 4Form Method of production Limit dimensions (mm) Wire and springs Drawn D k 3 55.1 Technical specificationSections 1 and 7 of
17、BS B 100 5.2 Dimensional standardTable 1 of BS 2873:1969 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 + 315 C k k 360 C/t = 3 h/AC Charact
18、eristics 8Sampling Test piece Heat treatment Delivery conditionUse condition 9Dimensions concernedmm 10Thickness of cladding on each face% 11Direction of sample 12 Tensile TemperatureCAmbient temperature 13Proof stressRp0.2MPa 14StrengthRmMPa1 100 k Rmk 1 380 (1) 15ElongationA% 16Reduction of areaZ%
19、 Characteristics 17Hardness 18Shear strengthRcMPa 19Bendingk 20Impact strength 21 Creep TemperatureC 22Timeh 23StressaMPa 24Elongationa% 25Rupture stressRMPa 26Elongation at ruptureA% 43Wrapping testThe test sample shall withstand, without cracking, being closely wound to form a helix of five turns
20、round a mandrel of diameter equal to that of the wire 97Designation 98Notes(1) The upper limit tensile strength does not apply to wire of D k 0.5 mm. 99Typical use Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BS
21、I blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 33:1991 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing Bri
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30、ther purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI