BS-B-25-1991.pdf
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1、BRITISH STANDARD BS B 25:1991 Incorporating Amendment No. 1 Specification for Copper-nickel-silicon alloy rods, sections, forging stock and forgings (heat treated) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BS
2、I BS B 25:1991 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 31 October 1991 BSI 11-1999 The following BSI references relate to the work on this standard:
3、Committee reference ACE/16 Draft for comment 90/73953 DC ISBN 0 580 19995 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 following bodies were
4、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 7647April 1993Indicated by a sideline in the margin Licensed Copy: London South Bank University,
5、London South Bank University, Sat Dec 09 03:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 25:1991 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Technical requirements1 Table 1 Technical requirements for Cu-Ni-Si alloy rods and sections (
6、heat treated)2 Table 2 Technical requirements for Cu-Ni-Si alloy forging stock and forgings (heat treated)3 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 25:1991 ii BSI 11-1999 Foreword This British Stan
7、dard has been prepared under the direction of the Aerospace Standards Policy Committee and is a conversion and revision of MoD (PE) Specification DTD 498, which it supersedes. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are re
8、sponsible 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, pages i and ii, pages 1 to 4 and a back cover. This standard has been updated (see cop
9、yright 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 University, London South Bank University, Sat Dec 09 03:04:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 25:1991 BSI 11-19991 1 Scope
10、This British Standard specifies the inspection and testing procedures, chemical composition, heat treatment and mechanical properties for a copper-nickel-silicon alloy supplied in the form of rods (bars), sections, forging stock and forgings. 2 References This standard makes reference to the followi
11、ng standards publications: BS B 100, Procedure for inspection, testing and acceptance of wrought copper alloys1). BS 2872, Specification for copper and copper alloy forging stock and forgings. BS 2874, Specification for copper and copper alloy rods and sections (other than forging stock). BS 5555, S
12、pecification 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 Part 1: General requirements1
13、). 3 Technical requirements 3.1 Material to this standard shall comply with the technical requirements specified in Table 1 for bars, rods and sections and Table 2 for forging stock and forgings. All material supplied shall comply with the requirements appropriate to its dimensions and condition as
14、specified in the standards given in line 5 of Table 1 or Table 2. 3.2 Symbols and units in Table 1 and Table 2 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 03:04:48
15、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS B 25:1991 2 BSI 11-1999 Table 1 Technical requirements for Cu-Ni-Si alloy rods and sections (heat treated) 1 Material designationCuNi3Si 2Chemical composition %ElementNiSiAlFeTotal impuritiesCu min.2.00.4Base max.3.50.80.020.100.30 (1) 3Method of meltin
16、g 4Form Method of production Limit dimensions (mm) Rods, and sections Extruded and/or rolled, extruded and drawn, rolled and drawn or forged 55.1 Technical specificationSections 1 and 2 of BS B 100 5.2 Dimensional standardBS 2874(2) 66.1 Delivery condition and heat treatment Heat treated 800 C k k 9
17、00 C/WQ or OQ + U 450 C/t U 1 h/AC 6.2 Delivery condition code 7Use 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 TemperatureCAmbie
18、nt temperature 13Proof stress Rp0.2 MPaU 430 14Strength Rm MPaU 580 15Elongation A %U 18 16Reduction of area Z % 17Hardness167 k HV k 218 (159 k HB k 207) 18Shear strength Rc MPa 19Bending k 20Impact strength 21TemperatureC 22Timeh 23Stress a MPa 24CreepElongation a % 25Rupture stress R MPa 26Elonga
19、tion at rupture A % 97DesignationB 25 A 98Notes(1) Total impurities exclude Al and Fe. (2) Material 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 gi
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