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1、BRITISH STANDARD OBSOLESCENT FEBRUARY 1999 BS 2S 92:1964 (Replacing BS S 92) Incorporating Amendment No. 1 Specification for aircraft material Carbon-manganese steel (Suitable for welding) (40/55 tonf/sq in: limiting ruling section 4 in) UDC 629.13:669.1574:621.791.011 Licensed Copy: sheffieldun she
2、ffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2S 92:1964 This British Standard, having been approved by the Aircraft Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Cou
3、ncil of the Institution on 31 January 1964 BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment D62/3645 ISBN 0 580 34455 X A British Standard does not purport to include all the necessary provisions of a contract. Users of Britis
4、h Standards are responsible for their 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 and a back cover. This standard has be
5、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueComments 6315January 1968Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffi
6、eldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2S 92:1964 BSI 04-2000i Contents Page 1Inspection and testing procedure1 2Process of manufacture1 3Chemical composition1 4Surface dressing1 5Condition2 6Final heat treatment2 7Mechanical properties2 Licensed Copy: sheffield
7、un sheffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2S 92:1964 BSI 04-20001 NOTE 1Where metric equivalents are stated the figures in British units are
8、 to be regarded as the standard. Where Fahrenheit equivalents are stated, the temperatures in degrees Celsius are to be regarded as the standard. The conversions are approximate. More accurate conversions should be based on the tables in BS 350, “Conversion factors and tables”. NOTE 2In place of the
9、 customary, but incorrect use of the pound, ton or kilogramme as units of force, the units called pound-force (abbreviation lbf), ton-force (abbreviation tonf) or kilogramme-force (abbreviation kgf) have been used in this standard. These are the forces which, when acting on a body of mass one pound,
10、 one ton or one kilogramme respectively, give it an acceleration equal to that of standard gravity. 1 Inspection and testing procedure 1.1 This British Standard shall be used in conjunction with the relevant sections of BS 3S 100 as follows: 1.2 Sulphur printing or deep etching tests. Samples shall
11、be selected in accordance with BS 3S 100, Section 1, Clause 7.2.1. 2 Process of manufacture The material shall be manufactured by the acid open hearth or an electric process, unless otherwise agreed between the manufacturer and the purchaser in accordance with BS 3S 100, Section 1, Clause 3.1. 3 Che
12、mical composition The steel shall contain: 4 Surface dressing The material shall be locally dressed in accordance with the requirements of BS 3S 100, Section 1, Clause 5.2. Bars for machining delivered in other than the finally heat treated condition. (See Clause 5.1) Sections 1 and 2. Bars for mach
13、ining delivered in the finally heat treated conditionSections 1 and 3. Billets and bars for forgingSections 1 and 5. ForgingsSections 1 and 6. Parts heat treated after machiningSections 1 and 7. Element Per cent min.max. Carbona0.180.26 Silicon0.100.35 Manganese1.31.7 Nickel0.40 Chromium0.25 Molybde
14、num0.10 Sulphur0.045 Phosphorus0.040 a By agreement between the manufacturer and the purchaser the maximum carbon content for ruling sections greater than 2“ inches may be 0.30 per cent. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2S
15、92:1964 2 BSI 04-2000 5 Condition 5.1 The material shall be supplied in the appropriate condition stated below unless otherwise agreed between the manufacturer and the purchaser in which case the condition in which the material is to be supplied shall be stated on the order. 5.2 Parts shall be suppl
16、ied finally heat treated. 6 Final heat treatment 6.1 Except as provided in Clause 6.3, the final heat treatment shall be: a) Harden in oil or water from a temperature between 860 C and 900 C (1 580 F and 1 650 F). b) Temper at a suitable temperature-between 550 C and 680 C (1 020 F and 1 255 F). 6.2
17、 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 restore the proof stress. 6.3 Alternatively to Clause 6.1, forgings and parts shall be heat treated in accordance with the
18、requirements of the drawing or order, subject to the provisions of BS 3S 100, Section 6, Clause 4.1, or Section 7, Clause 3.1. 7 Mechanical properties 7.1 Mechanical tests. Except where they are required by BS 3S 100 to be agreed between the manufacturer and the purchaser, the mechanical properties
19、obtained from test pieces selected and prepared in accordance with the relevant requirements of BS 3S 100 shall be: NOTEThe 0.1 per cent proof stress is expected to be not less than 31 tonf/sq in (49 kgf/mm2). 7.2 Hardness. The hardness of finally heat treated material and parts shall be: 179 min./2
20、55 max. HB or 190 min./270 max. HV DesignationMaterialCondition of supply S.92BBlack bars for machiningFinally heat treated S.92DBright bars for machiningFinally heat treated and cold drawn or cold rolled or machined or ground before or after final heat treatment S.92ABillets and bars for forgingAs
21、rolled or forged S.92CForgingsFinally heat treated 0.2 per cent proof stress Tensile strength Elongation per cent on gauge length Impact tonf/sq inkgf/mm2tonf/sq inkgf/mm25.65 Soft lbf min.min.min.max.min.max.min.min. 3250405563871535 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:20:26 G
22、MT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2S 92:1964 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for pre
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31、 for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:20:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI