1、BRITISH STANDARD AEROSPACE SERIES BS 2HC 203: 1989 Specification for Nickel-chromium- aluminium- molybdenum-niobium alloy castings (Nickel base Cr 13.0, Al 6.0, Mo 4.5, Nb2.3) UDC 629.7:669.245267128293 14:669.245.018BS2HC203:1989 This British Standard, having been prepared under the directionof the
2、 Aerospace Standards Policy Committee ACE/-, was published under theauthority of the Board of BSIand comes into effect on 31October 1989 BSI 12-1999 First published February 1973 First revision October 1989 The following BSI references relate to the work on this standard: Committee reference ACE/48
3、Draft for comment 88/70331 DC ISBN 0 580 17571 5 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 Indust
4、rial 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 CommentsBS2HC203:1989 BSI 12-1999 i Contents Page Committees responsible Inside front cover F
5、oreword ii 1 Scope 1 2 References 1 3 Material requirements 1 Table 1 Material requirements 2BS2HC203:1989 ii BSI 12-1999 Foreword This revision supersedes BS HC 203:1973, which is withdrawn, and includes trace elements in the chemical composition and is presented in a tabular format. The basic spec
6、ification 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 obligati
7、ons. 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 cover.BS2
8、HC203:1989 BSI 12-1999 1 1 Scope This British Standard specifies the chemical composition, mechanical properties and inspection and test requirements for a heat resisting precipitation hardening, nickel alloy (Nickel base, Cr 13.0, Al 6.0, Mo 4.5, Nb 2.3) in the form of castings and remelting stock.
9、 2 References 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 materia
10、ls 1) . 3 Material requirements The requirements for the material in the delivery and use of conditions are given inTable 1, the format and nomenclature of which complies with the requirements defined in BS EN2500. 1) In preparation.BS2HC203:1989 2 BSI 12-1999 Table 1 Material requirements 1 Chemica
11、l composition% or (parts per million) Element. C Si Mn S Ag Al As B Bi Cd Co Cr Cu Fe Ga Min. 0.08 5.5 (50) 12.0 Max. 0.20 0.50 0.25 0.015 (5) 6.5 (30) (150) (0.5) (0.2) 1.0 14.0 0.50 2.50 (30) Element. ln Mg Mo Nb + Ta Pb Sb Se Sn Ti Tl V W Zn Zr Ni Min. 3.8 1.8 0.5 0.05 Base Max. (0.2) (50) 5.2 2.
12、8 (5) (3) (5) (30) 1.0 (0.2) 0.1 0.2 (10) 0.15 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 heat treatment As cast, see note 1. 7 Use condition and heat treatment
13、 As cast, see note 1. 8 Test piece heat treatment sampling Cast None BS HC 100, sections 1 and 2 Separate or integral None, See note 1 See note 2 12 Tensile Temperature C Ambient 13 Proof stress R p 0.2 MPa W 685 14 Strength R m MPa W 755 15 Elongation A % W 2.5 17 Hardness H W 280 HB, or W 290 HV o
14、r W 28.5 HRC 21 Stress rupture Temperature C 980 22 Time t h 23 25 Rupture stress R MPa 150 26 Elongation at rupture A % W 4 27 NOTES 1If required by the order, castings shall be heat treated under vacuum or protective atmosphere for 2 hours at 1170 10 C and cooled to room temperature, followed by p
15、recipitation treatment at 870 10 C, for 2 hours. 2If required, the properties to be obtained on test pieces machined from designated areas of castings shall be agreed between the manufacturer and the purchaser.blankBS 2HC 203: 1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitut
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