1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2012 07 24 N-STATUS ESW-M5A5-B and ESW-M5A7-B A. Wedepohl, NA 2003 09 30 Revised Para 3.0 inserted; para 3.13 & 4 deleted 1964 07 13 Released CP5-447346 Controlled document at www.MATS Copyright 2012, Ford Global Technologies, Inc. Page 1 of
2、4 STEEL WIRE, OIL TEMPERED SPRING, NOT FOR NEW DESIGN ESW-M5A5-B ROUND OR FLAT, BLACK OXIDE FINISH STEEL WIRE, OIL TEMPERED SPRING, NOT FOR NEW DESIGN ESW-M5A7-B ROUND OR FLAT, PLAIN OIL DIPPED 1. SCOPE The materials defined by these specifications are generally open hearth steel products drawn into
3、 either round or flat wire, hardened in oil and tempered to the physical characteristics given below. 2. APPLICATION These specifications were released originally for material used in spring designs such as compression springs, torsion springs, extension springs, spring clips, etc. 3. REQUIREMENTS 3
4、0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). Part producers using this material in their products, must use Ford approved materials and must conform to a process c
5、ontrol plan which has been approved by STA and/or the relevant Materials Activity. 3.2 ROUND WIRE CHEMICAL COMPOSITION LESS THAN 7/32 (5.6MM) 7/32 IN (5.6 MM) and Larger Carbon 0.55 - 0.75 0.55 - 0.75 Manganese 0.60 - 0.90 0.80 - 1.20 Phosphorus 0.045 max 0.045 max Sulphur 0.050 max 0.050 max Silico
6、n 0.10 - 0.30 0.10 - 0.30 ENGINEERING MATERIAL SPECIFICATION ESW-M5A7-B ESW-M5A7-B Copyright 2012, Ford Global Technologies, Inc. Page 2 of 4 3.3 ROUND WIRE MECHANICAL REQUIREMENTS Acceptance of this class of material shall be based on tensile strength. The tensile strength, Ksi (MPa) shall be as fo
7、llows: Dia, in(mm) Min Max Dia, in(mm) Min Max 0.020(0.51) 288(1985) 323(2230) 0.093(2.36) 225(1550) 260(1790) 0.028(0.71) 281(1940) 316(2180) 0.105(2.67) 220(1520) 255(1760) 0.032(0.81) 275(1900) 310(2140) 0.120(3.05) 215(1480) 250(1725) 0.035(0.89) 268(1850) 303(2090) 0.135(3.43) 210(1450) 240(165
8、5) 0.041(1.04) 261(1800) 296(2040) 0.148(3.76) 205(1415) 235(1620) 0.047(1.19) 254(1750) 289(1995) 0.162(4.11) 200(1380) 230(1590) 0.054(1.37) 248(1710) 283(1950) 0.177(4.49) 195(1345) 225(1550) 0.0625(1.588) 242(1670) 277(1910) 0.192(4.88) 190(1310) 220(1520) 0.072(1.83) 236(1630) 271(1870) 0.207(5
9、26) 185(1275) 215(1480) 0.080(2.03) 230(1590) 265(1830) 0.225(5.72) 183(1260) 213(1470) 0.250(6.35) 180(1240) 210(1450) 0.500(12.70) 165(1140) 195(1345) 0.312(7.92) 178(1230) 208(1435) 0.562(14.27) 160(1100) 190(1310) 0.375(9.53) 175(1210) 205(1415) 0.625(15.88) 160(1100) 190(1310) 0.437(11.10) 170
10、1170) 200(1380) 3.4 ROUND WIRE BEND AND FRACTURE TEST Wire 0.162 in (4.11 mm) and smaller in diameter shall wind on itself as an arbor without breakage. Wires having diameters 0.162 - 0.312 in (4.11 - 7.92 mm) shall wind without breakage on a mandrel twice the wire diameter. The wire shall not show
11、 a coarse or cuppy condition when subjected to a fracture test. 3.5 ROUND WIRE DIMENSIONAL VARIATION The diameter shall not vary from that specified by more than the following: Size of Wire, in(mm) Allowable Variation +/- in (mm) 0.020 - 0.027 (0.51 - 0.69) 0.00075 (0.0191) 0.028 - 0.075 (0.71 - 1.9
12、1) 0.001 (0.03) 0.076 - 0.375 (1.93 - 9.53) 0.002 (0.05) 0.376 (9.55) and over 0.003 (0.08) The wire shall not be out of round more than one-half the total permissible variation prescribed for diameter variation as noted. 3.6 FLAT WIRE CHEMICAL COMPOSITION Shall correspond to SAE 1060 or SAE 1065 st
13、eel analysis unless otherwise specified on engineering drawing. ENGINEERING MATERIAL SPECIFICATION ESW-M5A7-B ESW-M5A7-B Copyright 2012, Ford Global Technologies, Inc. Page 3 of 4 3.7 FLAT WIRE MECHANICAL PROPERTIES Acceptance of this class of material will be based on hardness. The material shall c
14、onform to the following, unless otherwise specified. Thickness, in(mm) Hardness Range, Rockwell 0.015 (0.38) 15N 81.0 - 85.0 0.016 - 0.025 (0.41 - 0.64) 30N 62 - 67 0.026 - 0.060 (0.66 - 1.52) C43 - 48 0.061 - 0.070 (1.55 - 1.78) C42 - 47 0.071 - 0.080 (1.80 - 2.03) C41 - 46 0.081 - 0.090 (2.06 - 2.
15、29) C40 - 45 0.091 - 0.100 (2.31 - 2.54) C39 - 44 3.8 FLAT WIRE DIMENSIONAL VARIATIONS Thickness, in(mm) Allowable Variation +/- in(mm) Under 0.009 (0.23) 0.0005 (0.013) 0.010 - 0.030 (0.25 - 0.76) 0.001 (0.03) 0.031 - 0.062 (0.79 - 1.57) 0.0015 (0.038) 0.0625 - 0.225 (1.59 - 5.72) 0.002 (0.05) Widt
16、h Tolerance Plus or minus 0.005 in (0.13 mm) with #1 edge specified. (Hardened and tempered carbon spring steel flat wire customarily produced with #1 edge.) 3.9 MANUFACTURING REQUIREMENTS Springs manufactured with this material shall be stress relieved after forming, at a temperature sufficiently h
17、igh to produce a dimensionally stable part under maximum operating temperature for specific application as specified on the engineering print. This stress relieving process shall not adversely affect the tensile strength or hardness of the material. 3.10 FINISH Wire shall be supplied to this specifi
18、cation with one of the following surface finishes unless otherwise specified. ESW-M5A5-B Black Oxide Finish: To be specified where corrosion during use is not a problem. This finish will provide a small amount of corrosion protection during shop manufacturing operations. ESW-M5A7-B Plain Oil Dipped:
19、 May be specified where corrosion resistance is not a requirement. ESW-M5A5-B can be used in place of ESW-M5A7-B unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION ESW-M5A7-B ESW-M5A7-B Copyright 2012, Ford Global Technologies, Inc. Page 4 of 4 3.11 DIMENSIONAL STABILITY The dimensional
20、stability of a spring manufactured under this specification shall be such that no detrimental change in free height or number of coils shall occur when spring is heated to 200 C for 2 h in a free state, except hot set springs. 3.12 SURFACE CONDITION The wire shall be uniform in quality and in hardness, and shall not be wavy nor crooked. The surface as received shall be free from rust and excessive scale and be free from serious seams and deep scratches which will materially affect the quality of the finished product.
