BS 3T 53-1980 Specification for chromium-molybdenum steel tube (700 MPa) (outside diameter not less than 12 5 mm) (weldable)《铬-钼钢管材规范(700MPa)(管外径不小于12 5mm)(可焊接)》.pdf

《BS 3T 53-1980 Specification for chromium-molybdenum steel tube (700 MPa) (outside diameter not less than 12 5 mm) (weldable)《铬-钼钢管材规范(700MPa)(管外径不小于12 5mm)(可焊接)》.pdf》由会员分享，可在线阅读，更多相关《BS 3T 53-1980 Specification for chromium-molybdenum steel tube (700 MPa) (outside diameter not less than 12 5 mm) (weldable)《铬-钼钢管材规范(700MPa)(管外径不小于12 5mm)(可焊接)》.pdf（6页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED JUNE 1999 BS3T53:1980 (Superseding BS2T53) Specification for Chromium- molybdenum steel tube(700MPa) (Outside diameter not less than12.5mm) (Weldable) UDC629.7:669.152b28-194-462:621.791.011BS3T53:1980 This BritishStandard, having been prepared under the d

2、irectionof the Aerospace Standards Committee, was published under the authority ofthe Executive Board on 29February1980. Itcomesintoeffect (see note1) on 30May1980 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment78/77607 DC ISB

3、N 0 580 11167 9 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 doc

4、ument comprises a front cover, an inside front cover, pagesi andii, page1 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.

5、No. Date of issue CommentsBS3T53:1980 BSI 02-2000 i Contents Page 1 Inspection and testing procedure 1 2 Process of manufacture 1 3 Chemical composition 1 4 Surface dressing 1 5 Condition 1 6 Heat treatment 1 7 Decarburization 1 8 Mechanical properties 1ii blankBS3T53:1980 BSI 02-2000 1 NOTE 1Attent

6、ion is drawn to the fact that this British Standard does not come into effect until3 months after the date of publication. This is to enable users of the standard to obtain copies and make the necessary amendments to their documentation before the effective date. NOTE 2Tube of the same composition a

7、t higher strength levels is covered by BS T60 (for tube of maximum thickness8mm), BST76 and BS T77. 1 Inspection and testing procedure 1.1 General. This BritishStandard shall be used in conjunction with sections 1 and 2 of the latest issue of BS T100. 1.2 Sulphur printing or deep etching tests. One

8、sample shall be taken from each ingot for sulphur printing or deep etching tests. 2 Process of manufacture The steel shall be manufactured by an electric process. 3 Chemical composition The steel shall contain: 4 Surface dressing The steel shall be overall dressed. 5 Condition The tube shall be supp

9、lied in any of the following conditions, at the option of the manufacturer, unless a specific condition is stated on the order: a) cold drawn and tempered, or b) hardened and tempered, or c) normalized and tempered. 6 Heat treatment 6.1 Hardening. The hardening treatment shall consist of heating uni

10、formly at a temperature between870 C and910 C, followed by quenching in oil or water. 6.2 Normalizing. The normalizing treatment shall consist of heating uniformly at a temperature between870 C and910 C, followed by cooling in air. 6.3 Tempering. The tempering treatment shall consist of heating unif

11、ormly at a temperature of not more than675 C, followed by cooling in a suitable manner. 7 Decarburization The depth of decarburization, at either of the surfaces, shall be not greater than0.1mm or2% of the nominal thickness, whichever is the lesser. 8 Mechanical properties 8.1 Tensile test. The mech

12、anical properties obtained from test pieces, selected, prepared and tested in accordance with the relevant requirements of BS T100, shall be as follows. 8.2 Flattening test. The distance between the inner surfaces of the test piece in the direction of flattening shall be5T or0.75 internal diameter,

13、whichever is the smaller. 8.3 Hardness test. The hardness of the tube shallbe: 197min./262max. HB or 210min./275max. HV Element % min. max. Carbon Silicon Manganese Phosphorus Sulphur Chromium Molybdenum Nickel 0.22 0.15 0.5 0.9 0.15 0.29 0.35 0.8 0.020 0.015 1.2 0.25 0.30 0.2% proof stress Tensile

14、strength min. min. max. MPa (=N/mm 2 ) MPa (=N/mm 2 ) MPa (=N/mm 2 ) 620 700 900 NOTEInformation on SI units is given in BS3763 “The International System of units (SI)” and BS350 “Conversion factors and tables”.BS3T53:1980 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI i

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