1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 24 Revised Updated and renumbered 1978 11 10 Metricated and Retyped CAH1-RD572066-166 1963 06 05 Released AS1 #915 Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies
2、, Inc. STEEL WIRE, SPRING - GENERAL PURPOSE FASTENERS ESB-M1A26-A 1. SCOPE The material defined by this specification is a round or flat spring steel wire. 2. APPLICATION This specification was released originally for manufacturing fasteners for general use. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS
3、 FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 COMPOSITION The material shall be either annealed, hard drawn, or oil tempered steel wire according to the design of the part and the equi
4、pment necessary to form the part, and shall conform in composition to SAE 1060 or 1065 steel. 3.3 ANNEALED WIRE When made from annealed steel wire, the parts shall be given their spring temper by heating uniformly to a minimum temperature of 790C in a neutral atmosphere, quenching in oil, and temper
5、ing immediately at a minimum temperature of 340C to the desired hardness. 3.4 HARD DRAWN AND OIL TEMPERED WIRE When made from either hard drawn steel wire or oil tempered steel wire, the parts shall be given a low temperature temper after forming at approximately 315C for 15 minutes minimum to relie
6、ve forming strains. ENGINEERING MATERIAL SPECIFICATION ESB-M1A26-A Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 3.5 HARDNESS The finished parts shall conform in hardness to the following ranges: Rockwell “C“ 40.0 - 50.0 Rockwell “30N“ 59.5 - 68.5 Rockwell “15N“ 80.5 - 85.5 The scale us
7、ed shall be governed by the wire size and shall be in accordance with proper practice. 3.6 TOLERANCES The dimensions of the wire shall not vary from that specified by more than the following: Round Wire Diameter Variation 0.020 - 0.027 in (0.51 - 0.69 mm) +/- 0.00075 in (0.0191 mm) 0.028 - 0.075 in
8、(0.70 - 1.91 mm) +/- 0.001 in (0.03 mm) 0.076 - 0.375 in (1.92 - 9.53 mm) +/- 0.002 in (0.05 mm) 0.376 - over (9.54 mm - over) +/- 0.003 in (0.08 mm) Flat Wire Thickness Variation Under 0.010 in (0.25 mm) +/- 0.0005 in (0.013 mm) 0.010 - 0.028 in (0.25 - 0.73 mm) +/- 0.001 in (0.03 mm) 0.029 - 0.062
9、 in (0.74 - 1.58 mm) +/- 0.0015 in (0.038 mm) 0.0625 - 0.249 in (1.59 - 6.32 mm) +/- 0.002 in (0.05 mm) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Thin parts and parts with difficult configurations made from annealed material are more susceptible to distortion when quenched and tempered after forming. The use of hard drawn or oil tempered material is recommended for these parts.
