1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 02 18 N-STATUS Replaced by EN 10305-2 E355+N L. Sinclair, NA 2002 09 11 Revised Updated and renumbered 1974 03 25 ES/ET0705/TP Released Printed copies are uncontrolled Page 1 of 2 Copyright 2010, Ford G
2、lobal Technologies, Inc. STEEL TUBE - WELDED, NORMALISED AND COLD DRAWN SQ-M1A9006-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a welded precision steel tube, which has been normalised and cold drawn to obtain special dimensional accuracy. 2. APPLICATION Thi
3、s material is normally used for manufacturing driveshaft tubes. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 MATERIAL Steel according to the f
4、ollowing analysis: % C 0.18 - 0.25 Si max 0.35 Mn 0.30 - 0.70 P max 0.05 S max 0.05 3.3 MECHANICAL PROPERTIES Tensile Strength (ISO R 375) min 540 MN/m2Yield Strength (0.2 % P.S. : ISO R 375) min 490 MN/m2Elongation (ISO R 375) min 8 % Hardness : 85 - 100 HRB ENGINEERING MATERIAL SPECIFICATION SQ-M1
5、A9006-A Page 2 of 2 Copyright 2010, Ford Global Technologies, Inc. 3.4 DRIFTING TEST, min 8 % (FLTM BA 155-01; in normalised condition before cold drawing operation). 3.5 FLATTENING TEST No cracks (ISO R 302: 3 oclock position of weld seam; distance between pressure plates 4 times wall thickness; in
6、 normalised condition before cold drawing operation). 3.6 NON-DESTRUCTIVE TESTING The tubes must be 100 percent tested in the cold drawn condition for defects. The test is carried out at an eddy current testing facility which conforms in design and calibration with BS 3889 Part 2A. On tubes having an outside diameter larger than 63mm, the calibration of the testing facility, as it is understood by this specification, has to be done with a testhole of 2 mm. Tubes which give a defect signal have to be segregated.
