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1、BRITISH STANDARD AEROSPACE SERIES BS S 525:1969 (Superseding in part BS S 520) Incorporating Amendments Nos. 1, 2 and 3 Specification for cold-rolled 18/10 chromium-nickel corrosion-resisting steel sheet and strip (niobium stabilized: 800 MPa) UDC 629.7:669.152624293 122.2 194:669.14.018.8 41 ? Lice
2、nsed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 525:1969 This British Standard, having been approved by the Aerospace Industry Standards Committee was published under the authority of the Executive Board of th
3、e Institution on 30 May 1969 BSI 27 May 2003 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 68/19874 ISBN 0 580 05379 2 Amendments issued since publication Amd. No.DateComments 4253April 1983 5560July 1987 1415227 May 2003Indicated by a
4、 sideline Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 525:1969 BSI 27 May 2003 i Contents Page Forewordii 1Inspection and testing procedure1 2Process of manufacture1 3Chemical composition1 4Surface dre
5、ssing1 5Condition1 6Mechanical properties1 7Intercrystalline corrosion test2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 525:1969 ii BSI 27 May 2003 Foreword This publication does not purport to includ
6、e all the necessary provisions of a contract. Users are responsible for its 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,
7、 an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 0
8、3:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 525:1969 BSI 27 May 2003 1 NOTE 1Sheet and strip of the same composition for use in the softened condition are covered by the latest edition of BS S 527. NOTE 2Filler rods that comply with BS 1453 Grade A8, for gas welding, or with BS 2901 Grad
9、e A8, for inert-gas arc welding, are suitable for welding steel of this composition. 1 Inspection and testing procedure 1.1 This British Standard shall be used in conjunction with the relevant sections of the latest edition of BS S 500. 1.2 The thickness of the material shall be in accordance with t
10、he latest edition of BS S 500. 1.3 Sulphur printing or deep etching tests. Samples shall be selected in accordance with the latest edition of BS S 500. 2 Process of manufacture The material shall be manufactured by an electric process unless otherwise agreed between the manufacturer and the purchase
11、r in accordance with the latest edition of BS S 500. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed in accordance with the requirements of the latest edition of BS S 500. 5 Condition 5.1 The material shall be supplied in one of the following
12、conditions: 1) Cold-rolled. 2) Cold-rolled and tempered. 5.2 Text deleted 6 Mechanical properties The mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of the latest edition of BS S 500 shall comply with the following: 1) Tensile test.
13、 2) Single bend test. The test piece shall be bent cold without cracking through an angle of 180 over a former with a radius equal to one and a half times the nominal thickness of the sheet or strip. Element% min.max. Carbon0.08 Silicon0.21.0 Manganese0.52.0 Phosphorus0.035 Sulphur0.025 Chromium17.0
14、19.0 Molybdenum1.0 Nickel9.011.0 Niobium10 carbon content1.0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 525:1969 2 BSI 27 May 2003 7 Intercrystalline corrosion test 7.1 A bend test piece shall be sele
15、cted by the inspector to represent each cast. The test piece shall be heated for 30 minutes at a temperature of 650 10 C and cooled in air. It shall then be immersed for 72 hours in a boiling solution having the following composition: 111 grammes copper sulphate crystals (CuSO45H2O); 98 grammes conc
16、entrated sulphuric acid (specific gravity 1.84) made up to 1 litre with distilled water. Precaution shall be taken during boiling to prevent concentration due to evaporation. 7.2 The test piece treated in accordance with 7.1 shall then be subjected to, and meet the requirements of, the single bend t
17、est in accordance with Clause 6, 2). 7.3 Re-tests 7.3.1 If any test piece fails to meet the requirements of 7.2 the inspector shall select two further test pieces from the batch, one of which shall be taken from the item originally sampled, unless that item has been withdrawn by the manufacturer. 7.
18、3.2 Both these further test pieces, selected in accordance with 7.3.1, shall be treated in accordance with 7.1 and tested in accordance with, and meet the requirements, of 7.2. 0.2 % proof stressTensile strengthElongation on thickness Less than 1.5 mm1.5 to 3.0 mmOver 3.0 mm MPaMPa% min.min.max.min.
19、min.min. 6408001 100111315 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:43 GMT+00:00 2006, Uncontrolled Copy,
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