BS 2HR 202-1973.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS 2HR 202:1973 (Superseding BS HR 202) Incorporating Amendment No.1 Specification for Nickel-chromium- cobalt-titanium- aluminium heat-resisting alloy sheet and strip (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) UDC 629.7:669.245262529571 4:669.018.4 Licensed Co
2、py: sheffieldun sheffieldun, na, Tue Nov 28 14:17:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2HR 202:1973 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of the Executive Board on 12 February 1973 BSI 01-2000 The foll
3、owing BSI references relate to the work on this standard: Committee reference ACE/48 Draft for approval 72/33141 ISBN 0 580 07258 4 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. Com
4、pliance 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, page 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpora
5、ted. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueComments 6143June 1990Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:44 GMT+00:00 2006, Uncontrolled Copy, (c) BS
6、I BS 2HR 202:1973 BSI 01-2000i Contents Page 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Condition1 5Heat treatment1 6Mechanical properties1 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:17:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy:
7、 sheffieldun sheffieldun, na, Tue Nov 28 14:17:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2HR 202:1973 BSI 01-20001 NOTE 1This specification complies with AICMA Recommendation Ni-P96-HT for cold rolled material, in respect of material stress rupture tested at 870 C. NOTE 2Other forms of this a
8、lloy are covered by British Standards: BS HR 2, Billets, bars, forgings and parts. BS HR 402, Seamless tubes. BS HR 501, Cold drawn wire for springs. BS HR 502, Cold drawn and solution heat treated wire for springs. BS HR 503, Wire for thread inserts. 1 Inspection and testing procedure This British
9、Standard shall be used in conjunction with BS 2 HR 100, Sections 1 and 5. 2 Manufacture Unless otherwise agreed between the manufacturer and the purchaser in accordance with BS 2 HR 100, 1.4, the material shall be manufactured by one of the following processes: 1) Induction melted and cast in air. 2
10、) Induction melted, vacuum refined and cast in air. 3) Consumable electrode remelted. 3 Chemical composition The alloy shall contain: 4 Condition The material shall be supplied in the cold rolled, softened and descaled condition. 5 Heat treatment 5.1 Softening treatment. The material shall be heated
11、 uniformly at a temperature within the range 1 100 C to 1 150 C for 1 min to 10 min, followed by cooling in a suitable medium to ensure that the material complies with the hardness requirements of 6.2.1. 5.2 Precipitation treatment. Where required by Clause 6, test samples shall be heated at a tempe
12、rature of 750 10 C for 4 h, followed by cooling in air. 6 Mechanical properties 6.1 Mechanical tests. The mechanical properties obtained from test pieces selected, prepared and tested in accordance with the relevant requirements of BS 2 HR 100, shall be as follows. 6.1.1 Stress rupture test. The tes
13、t sample shall be selected from material at a stage prior to the manufacture of the plate, sheet or strip and shall be heat treated as follows: 1) solution treated at 1 080 10 C for 8 h, followed by cooling in air; 2) precipitation treated at 700 10 C for 16 h, followed by cooling in air. 6.1.2 Room
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