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1、BRITISH STANDARD BS B 26:1991 Specification for Copper-nickel-silicon alloy rods and sections (cold worked and heat treated) 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 26:1991 This British Standard, h
2、aving 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 31 October 1991 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/16 Draft for co
3、mment 90/73954 DC ISBN 0 580 19996 7 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 following bodies were represented: British Non-ferrous Metals
4、 Federation Copper Development Association Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BS
5、I BS B 26:1991 BSI 01-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Technical requirements1 Table 1 Technical requirements for Cu-Ni-Si alloy rods and sections (cold worked and heat treated)2 Licensed Copy: London South Bank University, London South Ba
6、nk University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 26:1991 ii BSI 01-2000 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is a conversion and revision of MoD (PE) Specification DTD 504, which it supe
7、rsedes. 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 from legal obligations. Summary of pages This document co
8、mprises 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 will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank Univer
9、sity, London South Bank University, Sat Dec 09 03:04:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 26:1991 BSI 01-20001 1 Scope This British Standard specifies the inspection and testing procedures, chemical composition, heat treatment and mechanical properties for a copper-nickel-silicon alloy
10、 supplied in the form of rods (bars) and sections. 2 References This standard makes reference to the following standards publications: BS B 100, Procedure for inspection, testing and acceptance of wrought copper alloys1). BS 2874, Specification for copper and copper alloy rods and sections (other th
11、an forging stock). 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 0 General principles. BS EN 2500, Instructions for the drafting and use of metallic material standards P
12、art 1 General requirements1). 3 Technical requirements 3.1 Material to this standard shall comply with the technical requirements specified in Table 1. All material supplied shall comply with the requirements appropriate to its dimensions and condition as specified in the standards given in line 5 o
13、f Table 1. 3.2 Symbols and units in Table 1 shall be interpreted in accordance with BS 5555, BS 5775-0 or BS EN 2500-1. 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 26:1991 2 BSI 01-2
14、000 Table 1 Technical requirements for Cu-Ni-Si alloy rods and sections (cold worked and heat treated) 1Material designationCuNi3Si 2Chemical composition %ElementNiSiAlFeTotal impurities Cu min.2.00.4Base max.3.50.80.100.100.30 (1) 3Method of melting 4Form Method of production Limit dimensions (mm)
15、Rods and sections Extruded, rolled, forged and cold drawn 55.1 Technical specificationSections 1 and 2 of BS B 100 5.2 Dimensional standardBS 2874(2) 66.1 Delivery condition and heat treatment Cold drawn and heat treated 800 C k k 900 C/WQ or AC + U 450 C/t = 1 h/AC 6.2 Delivery condition code 7Use
16、condition and heat treatment Delivery condition Characteristics 8Sampling Test piece Heat treatment Delivery condition 9Dimensions concernedmm 10Thickness of cladding on each face % 11Direction of sampleL 12 Tensile Temperature CAmbient temperature 13Proof stressRp0.2MPaU 590 14StrengthRmMPaU 650 15
17、ElongationA%U18 16Reduction of area Z% 17Hardness183 k HV k 234 (174 k HB k 223) 18Shear strengthRcMPa 19Bendingk 20Impact strength 21 Creep Temperature C 22Time h 23Stress a MPa 24Elongationa% 25Rupture stress R MPa 26Elongation at rupture A % 98Notes (1) Total impurities exclude Al and Fe. (2) Mat
18、erial group II tolerances shall apply. For round rod, normal tolerances shall apply unless close tolerances are specified on the order. NOTEThe dimensional tolerances for rods larger than the size ranges given in BS 2874 should be agreed between the supplier and the purchaser. Licensed Copy: London
19、South 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 26:1991 BSI 389 Chiswick High Road
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