1、BRITISH STANDARD AEROSPACE SERIES BS 3S 132:1976 (Superseding BS 2S 132) Incorporating Amendments Nos. 1, 2 and 3 Specification for 3%chr omi um - molybdenum-vanadium steel billets, bars, forgings and parts (1 3201 470 MPa: limiting ruling section 70 mm) (suitable for nitriding) UDC 629.7:669.15 26
2、28 292:669.14.018.29 CONFIRMEDAUGUST 1985BS 3S 132:1976 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 30 May 2003 The following BSI references relate to the
3、work on this standard: Committee reference ACE/15 Draft for comment 74/74367 DC ISBN 0 580 08779 4 Amendments issued since publication Amd. No. Date Comments 2220 February 1977 3530 August 1981 14160 30 May 2003 Indicated by a sidelineBS 3S 132:1976 BSI 30 May 2003 i Contents Page Foreword ii 1 Insp
4、ection and testing procedure 1 2 Manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 2 6 Heat treatment 2 7 Mechanical properties 2BS 3S 132:1976 ii BSI 30 May 2003 Foreword This publication does not purport to include all the necessary provisions of a contract. Users are respons
5、ible 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 inside back cover and a back cover. The BSI copyright notic
6、e displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.BS 3S 132:1976 BSI 30 May 2003 1 NOTE The specified chemical composition, heat treatment and tensile properties comply with AECMA Recommendation FE-PL5
7、6 (for material heat treated to a tensile strength of 1 3201 470 MPa). 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 printing or deep etching tests. One sample shal
8、l 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. 3 Chemical composition The steel shall contain
9、: 4 Surface dressing The material shall be overall dressed. Bars for machining delivered in other than the finally heat treated condition sections 1 and 2 Bars for machining delivered in the finally heat treated condition (see 5.1)s e c t i o n s 1 a n d 3 Forging stock and billets and bars for subs
10、equent working sections 1 and 5 Forgings sections 1 and 6 Parts finally heat treated (and nitrided) after machining sections 1 and 7 Element % min. max. Carbon 0.35 0.43 Silicon 0.10 0.35 Manganese 0.40 0.70 Phosphorus 0.020 Sulphur 0.020 Chromium 3.0 3.5 Molybdenum 0.80 1.10 Nickel 0.30 Tin 0.030 V
11、anadium 0.15 0.25BS 3S 132:1976 2 BSI 30 May 2003 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 heat treated and, if appropriate, stabilized and nitrided. 6 Heat treatment 6.1 Soft
12、ening treatment. The softening treatment shall consist of heating uniformly at a temperature of not less than 700 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 950 10 C, followed by cooling in oil. b) Tempering. Heat
13、 uniformly at a temperature of not less than 600 C, followed by cooling in air. 6.2.2 If, exceptionally, bars for machining are delivered in the finally heat treated condition and have been subjected to a cold straightening or cold rolling operation, they shall be given a stress-relieving treatment,
14、 which shall be sufficient to restore the proof stress. 6.3 Stabilizing treatment. The stabilizing treatment, if any, shall consist of heating at a temperature of not less than 510 C nor more than the tempering temperature. 6.4 Blank nitriding treatment. The blank nitriding treatment of the addition
15、al impact test samples shall consist of heating at a temperature of 500 10 C for not less than 60 h. 7 Mechanical properties 7.1 Tensile test at room temperature and impact test. The mechanical properties obtained from test pieces shall be as follows: 7.2 Hardness test 7.2.1 The hardness of material
16、 heat treated in accordance with 6.1 shall be not greater than 277 HB. 7.2.2 The hardness of material, parts and test samples heat treated in accordance with 6.2 shall be: 388 min./429 max. HB; or 410 min./450 max. HV. Designation Form Condition of supply S132B Black bars for machining Softened S132
17、D Bright bars for machining Softened and subsequently cold drawn, cold rolled, machined or ground S132A Forging stock and billets and bars for subsequent working Softened S132C Forgings Softened 0.2 % proof stress Tensile strength Elongation Reduction of area Izod impact min. min. max. min. min. min
18、. MPa MPa MPa % % ft lbf 1 130 1 320 1 470 8 35 20blankBS 3S 132:1976 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international l
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