1、BRITISH STANDARD AEROSPACE SERIES BS2HC 208:1989 Specification for Nickel-cobalt-tungsten- chromium-aluminium- molybdenum titanium-tantalum alloy castings (Nickel base Co10.0,W10.0,Cr9.0, Al5.5,Mo2.5, Ti1.5,Ta1.5) UDC 629.7:669.245252726712829529414BS2HC208:1989 This BritishStandard, having been pre
2、pared under the directionof the Aerospace Standards Policy Committee ACE/-, was published under theauthority of the Board ofBSIand comes into effect on 31 October 1989 BSI 01-2000 First published October 1979 First revision October 1989 The following BSI references relate to the work on this standar
3、d: Committee reference ACE/48 Draft for comment88/70335DC ISBN 0 580 17575 8 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/48, upon which the following bodies were r
4、epresented: British Industrial Fasteners Federation British Steel Industry Ministry of Defence Seamless Steel Tube Association Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date of issue CommentsBS2HC208:1989 BSI 01-2000 i Contents Page Committees respon
5、sible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Material requirements 1 Table 1 Material requirements 2BS2HC208:1989 ii BSI 01-2000 Foreword This revision supersedes BS HC208:1979, which is withdrawn, and includes trace elements in the chemical composition and is presented in a tabul
6、ar format. The basic specification for the material remains unchanged. 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 imm
7、unity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 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
8、 inside front cover.BS2HC208:1989 BSI 01-2000 1 1 Scope This BritishStandard specifies the chemical composition, mechanical properties and inspection and test requirements for a heat resisting nickel alloy (Nickel base, Co10.0, W10.0,Cr9.0,Al5.5, Mo2.5,Ti1.5,Ta1.5) in the form of castings and remelt
9、ing stock. 2 References This standard makes reference to the following BritishStandards: BS HC100, Inspection and testing procedure for iron, nickel, copper, cobalt and refractory metal base alloy castings. BS EN2500, Aerospace series Guidelines for the preparation and use of standards for metallic
10、materials 1) . 3 Material requirements The requirements for the material in the delivery and use of conditions are given in Table 1, the format and nomenclature of which complies with the requirements defined in BS EN2500. 1) In preparation.BS 2HC 208:1989 2 BSI 01-2000 Table 1 Material requirements
11、 1 Chemical composition % or (parts per million) Element C Si Mn S Ag Al As B Bi Cd Co Cr Cu Fe Ga In Min 0.13 5.3 0.01 9.0 8.0 Max. 0.17 0.20 0.20 0.010 (5) 5.7 (30) 0.02 (0.5) (0.2) 11.0 10.0 0.10 0.50 (30) (0.2) Element Mg Mo Pb Sb Se Sn Ta Te Ti TI V W Zn Zr Ni Min 2.3 1.3 1.3 9.0 0.03 Base Max.
12、 (30) 2.7 (5) (3) (5) (30) 1.7 (2) 1.7 (0.2) 0.1 11.0 (5) 0.08 2 1 2 3 3 Method of melting Vacuum melted and cast 4 Form Remelt stock Castings 5 Acceptance standard BS HC100, sections1 and2 BS HC100, sections1 and3 6 Delivery condition and heat treatment As cast, seenote1. 7 Use condition and heat t
13、reatment As cast, seenote1. 8 Test piece heat treatment sampling Cast None BS HC100, sections1 and2 Separate or integral None. Seenote1 Seenote2 21 Stress rupture Temperature C 980 22 Time t h W 30 25 Rupture stress R MPa 220 27 NOTES 1. If required by the order, castings shall be precipitation trea
14、ted under vacuum or protective atmosphere at870 10 C for16hours followed by cooling in vacuum or inert gas. 2. If required, the properties to be obtained on test pieces machined from designated areas of castings shall be agreed between the manufacturer and the purchaser.blankBS2HC 208:1989 BSI 389 C
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