BS-S-154-1976.pdf
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1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED JUNE 1999 BS S 154:1976 Superseding BS 2S 96 Incorporating Amendment Nos. 1 and 2 Specification for 2“ % nickel-chromium- molybdenum steel billets, bars, forgings and parts (8801080 MPa: limiting ruling section 150 mm) UDC 629.7:669.15 24 26 28:669.14.018.
2、29 BS S 154:1976 This British Standard, having been prepared under the direction of the Aerospace Industry Standards Committee, was published under the authority of the Executive Board on 31 March 1976 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference
3、ACE/15 Draft for comment 74/74367 DC ISBN 0 580 08759 X 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 lega
4、l obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 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 fron
5、t cover. Amendments issued since publication Amd. No.Date of issueComments 3818October 1981 5676October 1988Indicated by a sideline in the margin BS S 154:1976 BSI 01-2000i Contents Page 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Surface dressing1 5Condition1 6Heat trea
6、tment1 7Mechanical properties2 ii blank BS S 154:1976 BSI 01-20001 NOTEThe specified chemical composition, heat treatment and tensile properties comply with AECMA Recommendation FE-PL73 (for material heat treated to a tensile strength of 880 1 080 MPa). 1 Inspection and testing procedure 1.1 General
7、. This British Standard shall be used in conjunction with the relevant sections of the latest issue of BS S 100 as follows: 1.2 Sulphur printing or deep etching tests. One sample shall be taken from each ingot for sulphur printing or deep etching tests. 2 Manufacture The material shall be manufactur
8、ed by an electric process. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed. 5 Condition 5.1 Unless otherwise required by the order, the material shall be supplied in the appropriate condition stated below: 5.2 Parts shall be supplied finally h
9、eat treated. 6 Heat treatment 6.1 Softening treatment. The softening treatment shall consist of heating uniformly at a temperature of not less than 650 C. 6.2 Final heat treatment 6.2.1 The final heat treatment shall consist of the following: a) Hardening. Heat at a temperature of 850 10 C, followed
10、 by cooling in oil. b) Tempering. Heat uniformly at a temperature of not less than 600 C, followed by cooling in air. 6.2.2 Hardened and tempered bars which have been subjected to a cold straightening or cold rolling operation shall be given a stress-relieving treatment, which shall be sufficient to
11、 restore the proof stress. Bars for machining delivered in other than the finally heat treated condition (see 5.1) sections 1 and 2 Bars for machining delivered in the finally heat treated condition sections 1 and 3 Forging stock and billets and bars for subsequent working sections 1 and 5 Forgings
12、sections 1 and 6 Parts finally heat treated after machining sections 1 and 7 Element % min.max. Carbon0.270.35 Silicon0.150.35 Manganese0.450.70 Phosphorus0.025 Sulphur0.015 Chromium0.500.80 Molybdenum0.450.65 Nickel2.32.8 Aluminium0.0150.050 DesignationFormCondition of supply S154BBlack bars for ma
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