1、BRITISH STANDARD AEROSPACE SERIES BS S 163: 1990 Specification for Nickel-chromium- molybdenum-vanadium steel forging stock, forgings, bars and parts (1900 MPa: limiting ruling section 100 mm)BSS 163:1990 This British Standard, having been prepared under the directionof the Aerospace Standards Polic
2、y Committee, waspublished under the authorityof the Board ofBSIandcomes into effect on 31 October 1990 BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 89/73979 DC ISBN 0 580 18987 2 Committees responsible for this British Sta
3、ndard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/15 upon which the following bodies were represented: British Forging Industry Association British Independent Steel Producers Association British Industrial Fas
4、teners Federation British Investment Casting Trade Association British Steel Industry British Steel Industry (Wire Section) Civil Aviation Authority (Airworthiness Division) Institute of British Foundrymen Ministry of Defence National Association of Steel Stockholders Rolls-Royce Limited Seamless St
5、eel Tube Association Society of British Aerospace Companies Limited Steel Casting Research and Trade Association Amendments issued since publication Amd. No. Date of issue CommentsBSS 163:1990 BSI 04-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1
6、3 Technical requirements 1 Table 1 Technical requirements for Ni-Cr-Mo-V Steel 2BSS 163:1990 ii BSI 04-2000 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is a revision of MoD (PE) Specification DTD5192, which it supersedes. A Bri
7、tish 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. Summary of pages This document comprises a fro
8、nt cover, an inside front cover, pages i and ii, pages1 to 3 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.BSS 163:1990 BSI 04-2000 1 1 Scope This British Standar
9、d specifies the chemical composition, mechanical properties and inspection and test requirements for a nickel-chromium-molybdenum-vanadium steel (iron base, Ni 1.75, Cr1.25, Mo 1, V 0.2) supplied in the following forms and as parts for general aerospace use. a) Forging stock, designation S 163A, col
10、umns2,3 and 4 of Table 1. b) Forgings, designation S 163C, columns5,6and7 of Table 1. c) Black bars for machining, designation S 163B, columns 8, 9 and 10 of Table 1. d) Bright bars for machining, designation S 163D, columns 11, 12 and 13 of Table 1. 2 References This standard makes reference to the
11、 following standards publications: BS S 100, Procedure for inspection and testing of wrought steels (other than sheet, strip and tubes). BS EN 2500, Guidelines for the preparation and use of standards for metallic materials 1) . 3 Technical requirements 3.1 The material in its delivery and use condi
12、tions shall comply with Table 1, the format and nomenclature of which comply with BS EN 2500. 3.2 This standard shall be used in conjunction with BS S 100, as given in Table 1, or as given in 3.3 to3.8. 3.3 One sample from the top and bottom of each ingot shall be taken for sulphur printing or deep
13、etching tests. 3.4 The material shall be overall dressed. 3.5 Before rehardening, the material shall be softened. 3.6 Material shall not be hardened and tempered more than two times. 3.7 Parts finally heat treated after machining shall comply with sections 1 and 7 of BS S 100. 3.8 Parts shall be sup
14、plied in the hardened and tempered condition. 1) In preparation.BSS 163:1990 2 BSI 04-2000 Table 1 Technical requirements for Ni-Cr-Mo-V Steel 1 Chemical composition % Element C Si Mn P S Cr Mo Ni V Fe min. 0.38 0.50 0.30 1.0 0.80 1.5 0.10 Base max. 0.46 0.80 0.80 0.010 0.010 1.50 1.20 2.0 0.30 2 1
15、2 3 4 5 6 7 3 Method of melting Vacuum arc remelted 4 Form Method of production Limit dimensions Forging stock D eu 100 mm Forgings D eu 100 mm 5 Acceptance standards Sections 1 and 5 of BS S 100 Sections 1 and 6 of BS S 100 6 Condition of supply and heattreatment prior to delivery Softened 960 C u
16、u 980 C/FC to 660 C and hold W 48 h/AC (1) (5) (7) 7 Condition of use and heattreatment prior to use As condition of supply Hardened and tampered 600 C u u 650 C/910 C u u 930 C/OQ(1) (2) (5) + u 70 C/W 2 h (3) + W 300 C 8 Test piece Heat treatment Sampling Condition ofsupply Machined or forged test
17、 sample See line 29 Condition ofsupply Reference heat treatment See line 29 9 Dimensions concerned D or a mm W 125 (6) W 125 (6) 10 Thickness of cladding oneach face % 11 Direction of sample L T L T 12 Tensile Temperature C Ambient temperature 13 Proof stress R p0.2 Mpa W 1540 W 1 540 14 Strength R
18、m MPa 1870 u R mu 2060 1 870 u R mu 2060 15 Elongation A % W 6 W 4 W 6 W 4 16 Reduction of area Z % 17 Hardness HV u 285 or u 269 HB W 550 u 285 or u 269 HB W 550 18 Shear strength R c MPa 19 Bending (r = k a) k 20 ImpactIzod ft.lb W 10 W 5 W 10 W 5 29 Reference heat treatment 600 C u u 650 C/910 C
19、u u 930 C/OQ (1) (2) (5) + u 70 C/W 2 h (3) + W 300 C 97 Designation S 163A S 163C 98 Notes (1) The tolerance on the chosen temperature shall be 10 C. (2) Sections u 25 mm may be air cooled. (3) Cooling rate over the range 40 C to 70 C shall not exceed 25 C/h. (5) FC = Furnace cool; AC = Air cool; O
20、Q = Oil quench. (6) For material W 125 mm the longitudinal and transverse properties may be regarded as alternatives. (7) Alternative softening treatments may be used for forging stock.BSS 163:1990 BSI 04-2000 3 Table 1 Technical requirements for Ni-Cr-Mo-V Steel 1 Chemical composition % Element C S
21、i Mn P S Cr Mo Ni V Fe min. 0.38 0.50 0.30 1.0 0.80 1.5 0.10 Base max. 0.46 0.80 0.80 0.010 0.010 1.50 1.20 2.0 0.30 2 1 8 9 10 11 12 13 3 Method of melting Vacuum arc remelted 4 Form Method of production Limit dimensions Black bars forged or rolled D eu 100 mm Bright bars wrought, machined or groun
22、d D eu 100 mm 5 Acceptance standards Sections 1 and 2 of BS S 100 6 Condition of supply and heattreatment prior to delivery Softened 960 C u u 980 C/FC to 660 C and hold W 48 h/AC (1) (4) (5) 7 Condition of use and heattreatment prior to use Hardened and tampered 600 C u u 650 C/910 C u u 930 C/OQ (
23、1) (2) (5) + u 70 C/W 2 h (3) + W 300 C 8 Test piece Heat treatment Sampling Condition ofsupply Reference heat treatment See line 29 Condition ofsupply Reference heat treatment See line 29 9 Dimensions concerned D or a mm W 125 (6) W 125 (6) 10 Thickness of cladding oneach face % 11 Direction of sam
24、ple L T L T 12 Tensile Temperature C Ambient temperature 13 Proof stress R p0.2 Mpa W 1 540 W 1 540 14 Strength R m MPa 1 870 u R mu 2 060 1 870 u R mu 2 060 15 Elongation A % W 6 W 4 W 6 W 4 16 Reduction of area Z % 17 Hardness HV u 285 or u 269 HB W 550 u 285 or u 269 HB W 550 18 Shear strength R
25、c MPa 19 Bending (r = k a) k 20 ImpactIzod ft.lb W 10 W 5 W 10 W 5 29 Reference heat treatment 600 C u u 650 C/910 C u u 930 C/OQ (1) (2) (5) + u 70 C/W 2 h (3) + W 300 C 97 Designation S 163B S 163D 98 Notes (1) The tolerance on the chosen heat treatment temperature shall be 10 C. (2) Sections u 25
26、 mm may be air cooled. (3) Cooling rate over the range 40 C to 70 C shall not exceed 25 C/h. (4) Rolled bars may be softened as follows: Treatment to be stated on Certificate of Conformance. 800 C u u 820 C/FC 15 C per hour max. to 550 C/AC. (1) (5) (5) FC = Furnace cool; AC = Air cool; OQ = Oil que
27、nch. (6) For material W 125 mm the longitudinal and transverse properties may be regarded as alternatives.BS S 163: 1990 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
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