1、BRITISH STANDARD AEROSPACE SERIES BS 2S 129: 1976 (Superseding BSS129) Incorporating Amendment No. 1 Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540MPa: limiting ruling section 150 mm) UDC 629.7:669.152624295 4:669.14.018.
2、8BS2S129:1976 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published under the authorityofthe ExecutiveBoardon 31 August 1976 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for
3、 comment 75/74997 DC ISBN 0 580 09196 1 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 obligations. S
4、ummary of pages This document comprises a front cover, an inside front cover, pages i and ii, page1 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. Amendments issu
5、ed since publication Amd. No. Date of issue Comments 2646 July 1978 Indicated by a sideline in the marginBS2S129:1976 BSI 01-2000 i Contents Page 1 Inspection and testing procedure 1 2 Manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Heat treatment 1 7 Mechanical propertie
6、s 1ii blankBS2S129:1976 BSI 01-2000 1 NOTEIt should be noted that, in this edition, the mandatory weld decay test has been omitted as it is not considered necessary for a fully stabilized steel in normal circumstances. Should, exceptionally, this test be required, the order should be endorsed accord
7、ingly. 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 shall be taken from each ingot for sulphur printing or deep etching
8、tests. 2 Manufacture The material shall be manufactured by an electric process. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed. 5 Condition 5.1 The material shall be supplied in the appropriate condition stated below. 5.2 Parts shall be suppl
9、ied finally heat treated. 6 Heat treatment The final heat treatment shall consist of softening by heating uniformly at a temperature between1000 C and 1 100 C, followed by cooling in oil, water or air. 7 Mechanical properties 7.1 Tensile test at room temperature. The mechanical properties obtained f
10、rom test pieces shall be not less than: NOTEInformation on SI units is given in BS 3763 “The International System of units (SI)” and BS 350 “Conversion factors and tables”. 7.2 Hardness test 7.2.1 The hardness of black bars for machining and of forgings, in the condition of supply stipulated in5.1,
11、shall be not greater than 183 HB. 7.2.2 The hardness of bright bars for machining, in the condition of supply stipulated in 5.1, shall be not greater than 255 HB. Bars for machining delivered inthe finally heat treated condition sections 1 and 3 Forging stock and billets and bars for subsequent work
12、ing sections 1 and 5 Forgings sections 1 and 6 Parts finally heat treated aftermachining sections 1 and 7 Element % min. max. Carbon Silicon Manganese Phosphorus Sulphur Chromium Molybdenum Nickel Titanium 0.20 0.5 17.0 8.0 5 carbon content 0.08 1.0 2.0 0.035 0.025 19.0 1.0 11.0 0.8 Designation Form
13、 Condition of supply S129B Black bars for machining Finally heat treated S129D Bright bars for machining Finally heat treated and subsequently cold drawn, cold rolled, machined or ground S129A Forging stock and billets and bars for subsequent working As rolled or forged S129C Forgings Finally heat t
14、reated 0.2% proof stress Tensile strength Elongation Mpa (= N/mm 2 ) Mpa (= N/mm 2 ) % 210 540 35BS 2S 129: 1976 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standar
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