1、BRITISH STANDARD AEROSPACE SERIES BS 2HC 204: 1989 Specification for Nickel-cobalt- chromium-aluminium- titanium-molybdenum alloy castings (Nickel base Co 15.0, Cr 10.0, Al 5.5, Ti4.8, Mo 3.0) UDC 629.7:669.2452526712952814BS 2HC 204:1989 This British Standard, having been prepared under the directi
2、onof the Aerospace Standards Policy Committee ACE/-, was published under theauthority of the Board ofBSIand comes into effect on 31 October1989 BSI 12-1999 First published February 1973 First revision 31 October The following BSI references relate to the work on this standard: Committee reference AC
3、E/48 Draft for comment 88/70334 DC ISBN 0 580 17573 1 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/48, upon which the following bodies were represented: British I
4、ndustrial 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 CommentsBS2HC 204:1989 BSI 12-1999 i Contents Page Committees responsible Inside front c
5、over Foreword ii 1 Scope 1 2 References 1 3 Material requirements 1 Table 1 Material requirements 2BS 2HC 204:1989 ii BSI 12-1999 Foreword This revision supersedes BS HC 204:1973, which is withdrawn, and includes trace elements in the chemical composition and is presented in a tabular format. The ba
6、sic 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 immunity from legal
7、obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, 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 inside front c
8、over.BS2HC 204:1989 BSI 12-1999 1 1 Scope This British Standard specifies the chemical composition, mechanical properties and inspection and test requirements for a heat resisting nickel alloy (Nickel base, Co 15.0, Cr 10.0, Al 5.5, Ti 4.8, Mo3.0) in the form of castings and remelting stock. 2 Refer
9、ences This standard makes reference to the following British Standards: BS HC 100, Inspection and testing procedure for iron, nickel, copper, cobalt and refractory metal base alloy castings. BS EN 2500, Aerospace series Guidelines for the preparation and use of standards for metallic materials 1) .
10、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 BSEN2500. 1) In preparation.BS 2HC 204:1989 2 BSI 12-1999 Table 1 Material requirements 1 Chemical comp
11、osition % or (parts per million) Element C Si Mn S Ag Al As B Bi Cd Co Cr Cu Fe Ga In Min. 0.15 5.0 0.010 13.0 8.0 Max. 0.20 0.20 0.20 0.015 (5) 6.0 (30) 0.020 (0.5) (0.2) 17.0 11.0 0.20 1.0 (30) (0.2) Element Mg Mo Nb Pb Sb Se Sn Te Ti V W Zn Zr Mi Note (2) Min. 2.0 4.5 0.70 0.030 Base Max. (50) (1
12、) 4.0 0.25 (5) (3) (5) (30) (2) 5.0 1.20 0.20 (5) 0.09 2 1 2 3 3 Method of melting Vacuum melted and cast 4 Form Remelt stock Castings 5 Acceptance standard BS HC 100, sections 1 and 2 BS HC 100, sections 1 and 3 6 Delivery condition and heattreatment As cast 7 Use condition and heattreatment As cas
13、t 8 Test piece heattreatment sampling Cast None BS HC 100, sections 1 and 2 Separate or integral None See note 3 21 Stress rupture Temperature C 950 22 Time t h W 30 25 Rupture stress B R MPa 230 27 NOTES 1The magnesium content of the remelting stock shall be 10 W Mg W 50 p.p.m. 2The chemical compos
14、ition shall be controlled to limit the formation of Sigma phase. The method of control, the limits and the associated calculation shall be agreed between the manufacturer and the purchaser. 3If required, the properties to be obtained on test pieces machined from designated areas of casting shall be
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