1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2003 03 14 Revised WSD-M1A317-A removed, para 3.0 inserted; para 3.1, 3.7 and 4 deleted 1989 10 16 SM/ER1615TC Released O.Reeder, N.Riley Printed copies are uncontrolled Page 1 of 2 Copyright 2003, Ford Glob
2、al Technologies, Inc. STEEL - WELDED TUBE, NORMALIZED, COLD DRAWN WSD-M1A317-A2 1. SCOPE The material defined by this specification is a welded precision steel tube. Grade A2 is normalized and cold drawn to obtain special dimension accuracy. 2. APPLICATION This specification was released originally
3、for material used for manufacturing driveshaft tubes. 3. REQUIREMENTS 3.0 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 CHEMICAL COMPOSITION (weight percent) Carbo
4、n 0.18 0.25 Silicon, max. 0.35 Manganese 0.30 0.70 Phosphorus, max. 0.05 Sulphur, max. 0.05 3.3 MECHANICAL PROPERTIES (ASTM E8M) Ultimate tensile strength MN/m2, min 540 0,2 % Proof strength MN/m2, min 490 Elongation, min % 8 Hardness HRB (ASTM E 18) 85-100 ENGINEERING MATERIAL SPECIFICATION WSD-M1A
5、317-A2 Page 2 of 2 Copyright 2003, Ford Global Technologies, Inc. 3.4 DRIFTING TEST, min 8 % (ISO 166) Test in normalized condition 3.5 FLATTENING TEST no cracks (ISO 202) Test in normalized condition with weld seam at 3 oclock position and final distance between pressure plates equal to 4 x tube th
6、ickness. 3.6 NONDESTRUCTIVE TESTING The tubes must be 100 % tested for imperfections in the cold drawn condition. The test is carried out at an eddy current testing facility which conforms in design and calibration with B.S 3889 Part 2A. Reference Standard: An artificially produced imperfection of p
7、redetermined dimensions, usually a notch or a hole shall be used for the sole purpose of establishing the test sensitivity of the eddy current equipment. On tubes having an outside diameter greater than 63.0 mm, the calibration of the testing facility has to be undertaken with a reference standard containing a 2.0 mm drilled hole. Tubes are classified into acceptable or suspect categories. Tubes which indicate the presence of an imperfection must be sorted in accordance with BS 3889 Part 2A section 7.3.
