BS-S-151-1975.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS S 151:1975 Incorporating Amendments Nos. 1 and 2 Specification for Chromium-nickel- molybdenum-vanadium heat-resisting steel billets, bars, forgings and parts (9301130 MPa: limiting ruling section 150 mm) (Cr 12, Ni 2.5, Mo 1.7, V 0.3) UDC 629.7:669.15 ? 262428 ?
2、 292 4:669.14.018.4 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 151:1975 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority o
3、f the Executive Board on 30 September 1975 BSI 14 October 2002 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 73/32574 DC ISBN 0 580 08750 6 Foreword This publication has been prepared by Technical Committee ACE/15, Wrought and cast ste
4、els for aerospace. The start and finish of text introduced or altered by amendment is indicated in the text by tags ?. Tags indicating changes to text carry the number of the amendment. For example, text altered by amendment No. 1 is indicated by ?. This publication does not purport to include all t
5、he necessary provisions of a contract. Users are responsible for its correct application. Compliance 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, pages 1 and 2, an ins
6、ide back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last used. Amendments issued since publication Amd. No.DateComments 3783 31 December 1981 See foreword 1367814 October 2002See foreword Licensed Copy: London South Bank University, Lo
7、ndon South Bank University, Sat Dec 09 03:06:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 151:1975 BSI 14 October 2002 i Contents Page ForewordInside front cover 1Inspection and testing procedure1 2Manufacture1 3Chemical composition1 4Surface dressing1 5Condition2 6Heat treatment2 7Mechanical
8、properties2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
9、S 151:1975 BSI 14 October 2002 1 NOTEThis specified chemical composition compiles with AECMA Recommendation FEPM37 1 Inspection and testing procedure 1.1 General. 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 pri
10、nting or deep etching tests. One sample shall be taken from each ingot for sulphur printing or deep etching tests. 1.3 Ultrasonic examination. ?The material shall be ultrasonically tested in accordance with BS S 100, Annex B.? 2 Manufacture The material shall be manufactured by an electric process.
11、3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed. Bars for machining delivered in the finally heat treated conditionSections 1 and 3 Forging stock and billets and bars for subsequent working Sections 1 and 5 Forgings Sections 1 and 6 Parts fina
12、lly heat treated after machiningSections 1 and 7 Element% min.max. Carbon0.080.13 Silicon0.35 Manganese0.50.9 Phosphorus0.030 Sulphur0.025 Chromium11.012.5 Molybdenum1.52.0 Nickel2.03.0 Vanadium0.250.40 Nitrogen0.0200.040 Licensed Copy: London South Bank University, London South Bank University, Sat
13、 Dec 09 03:06:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 151:1975 2 BSI 14 October 2002 5 Condition 5.1 The material shall be supplied in the appropriate condition stated below: 5.2 Parts shall be supplied finally heat treated. 6 Heat treatment 6.1 Softening treatment. The material shall be
14、softened by heating uniformly at a temperature between?670?C and 720?C? for not less than 6 h, followed by cooling in air. 6.2 Final heat treatment 6.2.1 The material, parts and test samples shall be heat treated as follows: a) Hardening. Heat at a temperature of 1 050 ? 10 ?C, followed by cooling i
15、n air. b) Tempering. Heat at a temperature of 650 ? 5?C, followed by cooling in air. ?6.2.2 Where bars delivered in the finally heat treated condition have been subjected to a cold straightening or cold rolling operation, they may be given a stress relieving treatment. If a stress relieving treatmen
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