BS-HR-650-1972.pdf
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1、BRITISH STANDARD AEROSPACE SERIES BS HR 650:1972 (Superseding Ministry of Defence Specification D.T.D. 5026.) Incorporating Amendment Nos. 1 and 2Specification for High expansion heat-resisting steel bar and wire for the manufacture of bolts, studs, set screws and nuts (Ni 25.5, Cr 15, Ti 2, Mn 1.5,
2、 Mo 1.25, Si 0.7, V 0.3) (Limiting ruling section 20 mm) UDC 629.7:669.14.018-4-42:669 1524262957428782292:621:882 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 The British Standard, having bee
3、n approved by the Aerospace Industry Standards Committee was published under the authority of the Executive Board of the Institution on 7 April 1972 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/48 Draft for comment 70/25863 ISBN 0 580 06899 4
4、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. Summary of pages This document comprises
5、a front cover, an inside front cover, pages i and ii, pages 1 and 2 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 issued since publication Amd. No.Dat
6、e of issueComments 1817September 1975 3589August 1981Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 BSI 01-2000i Contents Page 1Inspection and testing proce
7、dure1 2Manufacture1 3Chemical composition1 4Cold working1 5Condition1 6Freedom from surface contamination1 7Heat treatment1 8Mechanical properties2 9Grain size2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI i
8、i blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 BSI 01-20001 NOTE 1This specification complies with AICMA Recommendation FE-PA92-HT. NOTE 2Other forms of this alloy are covered by British
9、 Standards: BS HR.51, Billets, bars, forgings and parts. 1 Inspection and testing procedure This British Standard shall be used in conjunction with sections 1 and 9 of the latest issue of BS HR 100. 2 Manufacture Unless otherwise agreed between the manufacturer and the purchaser in accordance with B
10、S HR 100 the material shall be manufactured by an electric process followed by consumable electrode vacuum arc remelting. 3 Chemical composition The alloy shall contain: 4 Cold working All material shall be softened in accordance with 7.1 and subsequently reduced 15 % to 25 % in cross-sectional area
11、 during final drawing or rolling at a temperature of not more than 870 C. 5 Condition Unless otherwise agreed, the material shall be supplied in the appropriate condition stated below. The condition or the use for which the material is intended shall be stated on the order. 6 Freedom from surface co
12、ntamination Material shall be inspected for freedom from surface contamination in accordance with the requirements of BS HR 100. 7 Heat treatment 7.1 Softening treatment. The material shall be heated uniformly at a temperature of 900 10 C for not less than 1 h followed by cooling in air, oil or wate
13、r. 7.2 Solution treatment. The material and test samples, as appropriate, shall be heated uniformly at a temperature of 980 10 C for not less than 1 h followed by cooling in air, oil or water. 7.3 Precipitation treatment. The material and test samples, as appropriate, shall be heated uniformly at a
14、temperature of 720 10 C for not less than 16 h followed by cooling in air. Element % min.max. Carbon0.08 Silicon1.0 Manganese2.0 Phosphorus0.020 Sulphur0.015 Aluminium0.35 Boron0.00300.010 Chromium13.516.0 Molybdenum1.01.5 Nickel24.027.0 Lead0.0050 Titanium1.92.3 Vanadium0.100.50 IronRemainder Gr 2
15、MaterialCondition of supply Material for machiningSoftened, cold worked, solution treated and machined or ground OR Softened, cold worked, solution treated, precipitation treated and machined or ground Material for forgingSoftened, cold worked and machined or ground OR Softened, cold worked, solutio
16、n treated and machined or ground Parts after machining or forging Solution treated and precipitation treated Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:55:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS HR 650:1972 2 BSI 01-2000 8 Mechanical properties
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