1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 10 03 Revised Was ESF-M1A15-A, made ESF-M1A15-A2, replaced M1A15-A updated and renumbered R. Lord 1980 05 01 3.2 Revisions to Tensile Strengths CEK2-877352-C7 1963 02 28 Released ECR 403163 CF9-119267 #
2、1 Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. STEEL, SPRING, SHOCK ABSORBER VALVES ESF-M1A15-A2 1. SCOPE The material defined by this specification is a hardened, tempered and bright polished, specially flattened carbon spring steel in strip form. 2. AP
3、PLICATION This specification was released for material used to manufacture valve discs and reeds for automotive shock absorbers. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production
4、Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION Carbon 0.90 - 1.05 Manganese 0.25 - 0.50 Silicon 0.15 - 0.30 Phosphorus 0.03 max Sulfur 0.04 max Carbon content of 0.80 - 0.90 is acceptable if other requirements of this specification are met. 3.3 MECHANICAL PROPERTIES (ASTM E 8) Nominal Thicknes
5、s Tensile Strength 0.005 in (0.13 mm) 292/320,000 psi (2010/2200 MPa) 0.008 in (0.20 mm) 278/311,000 psi (1920/2140 MPa) 0.010 in (0.25 mm) 270/298,000 psi (1860/2050 MPa) 0.012 in (0.31 mm) 263/291,000 psi (1820/2010 MPa) ENGINEERING MATERIAL SPECIFICATION ESF-M1A15-A2 Page 2 of 2 Copyright 2002, F
6、ord Global Technologies, Inc. 3.3.1 The material shall be of uniform hardness throughout and free from internal stresses and decarburization. 3.4 SURFACE The surface shall be polished, free from pits, scratches, scale and rust. A blue polished surface may be used. 3.5 FLATNESS The flatness of the ma
7、terial shall be as specified on the engineering drawing. 3.6 EDGE FINISH The slit edge shall be filed smooth and free from burrs. 3.7 THICKNESS TOLERANCE Unless otherwise specified on Engineering Drawing, the following thickness tolerances shall apply: Nominal Thickness Tolerance - Plus or Minus 0.005 in (0.13 mm) 0.00028 in (0.0071 mm) 0.008 in (0.20 mm) 0.00036 in (0.0091 mm) 0.010 in (0.25 mm) 0.00044 in (0.0112 mm) 0.012 in (0.31 mm) 0.00052 in (0.0132 mm)
