1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS S 206
2、:1999 Superseding DTD 5086 ICS 49.025.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chromium-nickel- aluminium corrosion resisting steel (precipitation hardening) rod, cold drawn wire and springsThis British Standard, having been prepared under the direction of the Engine
3、ering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 1999 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 98/706088 DC ISBN 0 580 33008 7 BS S 206:1999 Amen
4、dments issued since publication Amd. No. Date Comments Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/15, Wrought and cast steels for aerospace, upon which the following bodies were represented: British Investment Ca
5、sting Trade Association Civil Aviation Authority (Airworthiness Division) Confederation of British Forgers Institute of Spring Technology Ministry of Defence Society of British Aerospace Companies Stainless Steel Wire Industry Association UK Steel AssociationBS S 206:1999 BSI 11-1999 i Contents Page
6、 Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Technical requirements 1 Table 1 Technical requirements for chromium-nickel-aluminium corrosion resisting (precipitation hardening) steel rod, cold drawn wire and springs 1 Table 2 Tensile strength 3 Bibliogr
7、aphy 4ii BSI 11-1999 BS S 206:1999 Foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy committee, and is a conversion and revision of MOD(PE) specification DTD 5086 which it supersedes. A British Standard does not purport to include all the necessar
8、y 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 front cover, an inside front cover, pages i and ii, pages 1 t
9、o 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 11-1999 1 BS S 206:1999 Table 1 Technical requirements for chromium-nickel-aluminium corrosion resisting (precipitation hardening) steel rod, cold drawn wi
10、re and springs 1 Material Designation BS S 206 2 Chemical Composition % by mass Element C Si Mn P S Cr Ni Al Fe min. 16.0 6.50 0.75 max. 0.09 1.0 1.0 0.035 0.025 18.0 7.75 1.50 Base 3 Method of melting Air melted by an electric process 4.1 Form Rod (see line 98) Wire (see line 98) Springs 4.2 Method
11、 of production Rolled Cold drawn from rod conforming to BS S 206 A. Formed from wire conforming to BS S 206 B 4.3 Limit dimensions mm 0,25# D# 10,0 5.1 Technical specification BS S 100 BS S 100 BS S 100 5.2 Dimensional tolerances BS 2056 6.1 Delivery condition Solution treated Cold drawn Formed and
12、precipitation treated Heat treatment 1 0508C# u 1 0808C/ Air cooled 4758C# u# 4858C/ t = 1h/ Air cooled 6.2 Delivery condition code 7 Use condition Delivery condition Delivery condition Delivery condition 1) Published by AECMA as prestandards and available from BSI Customer Services, BSI, 389, Chisw
13、ick High Road, London W4 4AL. Specification 1 Scope This British Standard specifies the characteristics of a chromium-nickel-aluminium corrosion resisting steel for aerospace applications, supplied as springs manufactured from solution heat treated rod, cold drawn into wire, formed into springs and
14、finally precipitation hardened, designation S 206. It also covers the following intermediate product forms: a) rod: solution treated, for the manufacture of wire, designation S 206A; b) wire: diameter 0,25 mm# D# 10 mm, cold drawn from solution treated rod, for the manufacture of springs, designatio
15、n S 206B. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references
16、, the latest edition of the publication referred to applies. BS 5S 100, Procedure for inspection, testing and acceptance of wrought steels (other than plate, sheet, strip and tube). BS 2056, Specification for stainless steel wire for mechanical springs. 3 Technical requirements 3.1 The material in i
17、ts delivery and use conditions shall conform to Table 1. The wire, and the rod from which the wire is drawn, shall conform to Table 1. NOTE The format, line numbers and symbols of Table 1 are derived from, and should be interpreted in accordance with, European Standards EN 4500-1 1) and EN 4500-5 1)
18、 . The presentation is slightly modified to make it compatible with existing British Standards. 3.2 Section 1 and 10 of BS 5S 100: 1993, excluding the requirements of sub-clause 10.2.4, shall be applied to the rod and wire used for spring manufacture. 3.3 Dimensional tolerances shall be in accordanc
19、e with BS 2056:1991.2 BSI 11-1999 BS S 206:1999 Table 1 Technical requirements for chromium-nickel-aluminium corrosion resisting (precipitation hardening) steel rod, cold drawn wire and springs (continued) Characteristics 8.1 Test sample see BS S 100 Test on wire 8.2 Test piece see BS S 100 see BS S
20、 100 8.3 Heat treatment Delivery condition Precipitation treated 4758#u#4858C/ t = 1h/ Air cooled 9 Dimensions concerned mm see Table 2 see Table 2 10 Thickness of cladding on each face % 11 Direction of test piece L L 12 Temperature u 8C Ambient Ambient 13 Proof stress R p0.2 MPa 14 T Strength R m
21、MPa See Table 2 See Table 2 15 Elongation A% 16 Reduction of area Z% 17 Hardness 18 Shear strength R c MPa 19 Bending k 20 Impact strength 21 Temperature u 8C 22 Time h 23 C Stress s a MPa 24 Elongation a % 25 Rupture stress 26 Elongation at rupture A % 37 Reverse bending Test method see BS S 100,;
22、Section 10 Size applicability D$ 3mm Test condition Delivery condition Requirements 3 bends 43 Wrapping test Test method see BS S 100; Section 10 Size applicability D 3mm 97 Designation BS S 206 A BS S 206 B BS S 206 98 Notes For the manufacture of wire (see line 4.1) For the manufacture of springs
23、(see line 4.1) BSI 11-1999 3 BS S 206:1999 Table 2 Tensile strength Diameter mm Tensile strength MPa Over Up to and including Solution treated and cold drawn Solution treated, cold drawn and precipitation treated min. max. min. max. 0,25 0,32 1 880 2 110 2 230 2 530 0,32 0,40 1 860 2 090 2 210 2 510
24、 0,40 0,56 1 820 2 050 2 170 2 470 0,56 0,70 1 800 2 030 2 150 2 450 0,70 1,00 1 770 2 000 2 120 2 420 1,00 1,30 1 710 1 940 2 030 2 330 1,30 1,70 1 650 1 880 1 970 2 270 1,70 2,20 1 630 1 860 1 930 2 210 2,20 2,80 1 560 1 790 1 860 2 140 2,80 3,40 1 500 1 730 1 800 2 080 3,40 4,00 1 460 1 690 1 760
25、 2 040 4,00 4,50 1 420 1 650 1 720 2 000 4,50 5,50 1 400 1 630 1 680 1 950 5,50 6,00 1 380 1 610 1 660 1 930 6,00 7,50 1 350 1 580 1 600 1 870 7,50 8,00 1 330 1 560 1 530 1 800 8,00 10,00 1 270 1 500 1 470 1 7404 BSI 11-1999 BS S 206:1999 2) Published by AECMA as prestandards and available from BSI
26、Customer Services, BSI, 389, Chiswick High Road, London W4 4AL. Bibliography Standards publications prEN 4500-1:1996, Metallic materials Rules for drafting and presentation of material standards Part 1: General rules 2) . prEN 4500-5 :1996, Metallic materials Rules for drafting and presentation of m
27、aterial standards Part 5: Specific rules for steels 2) .blankBS S 206:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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