1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 23 Revised Updated and renumbered 1978 11 10 Metricated and Retyped CAH1-RD572066-166 1964 05 30 Released AT1 #1368 Printed copies are uncontrolled Page 1 of 3 Copyright 2002, Ford Global Technologie
2、s, Inc. STEEL WIRE, HARD DRAWN LOW TENSILE QUALITY ESB-M1A138-A 1. SCOPE The material defined by this specification is a round or flat steel wire processed to meet the physical requirements of this specification. 2. APPLICATION This specification was released originally for materials used for variou
3、s seat spring components such as border wires, arch wires, tension wires, and paper covered tie wires. 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)
4、 3.2 CHEMICAL COMPOSITION Carbon 0.45 - 0.75* Manganese 0.60 - 1.20* Phosphorus 0.045 max Sulphur 0.050 max Silicon 0.10 - 0.30 * Not varying more than 20 points in any one lot. *Not varying more than 30 points in any one lot. ENGINEERING MATERIAL SPECIFICATION ESB-M1A138-A Page 2 of 3 Copyright 20
5、02, Ford Global Technologies, Inc. 3.3 MECHANICAL PROPERTIES Acceptance of this class of materials will be based on the tensile strength. The tensile properties shall be as follows: Tensile Strength, Ksi (MPa) Tensile Strength, Ksi (MPa) Gage Dia.,in(mm) Min Max Gage Dia.,in(mm) Min Max 0.028(0.71)
6、271(1870) 311(2145) 9 0.148(3.76) 203(1400) 234(1610) 21 0.032(0.81) 265(1825) 305(2100) 8 0.162(4.11) 200(138) 230(1585) 20 0.035(0.89) 261(1800) 301(2075) 7 0.177(4.49) 195(1345) 225(1550) 19 0.041(1.04) 255(1760) 293(2020) 6 0.192(4.88) 192(1325) 221(1525) 18 0.047(1.19) 248(1710) 286(1970) 5 0.2
7、07(5.26) 190(1310) 218(1500) 17 0.054(1.37) 243(1675) 279(1925) 4 0.225(5.72) 186(1280) 214(1475) 16 0.0625(1.59) 237(1635) 272(1875) 0.250(6.35) 182(1255) 210(1450) 15 0.072(1.83) 232(1600) 266(1835) 0.312(7.92) 174(1200) 200(1380) 14 0.080(2.03) 227(1565) 261(1800) 0.375(9.53) 167(1150) 193(1330)
8、13 0.093(2.36) 220(1515) 253(1745) 0.437(11.10) 165(1135) 190(1310) 12 0.105(2.67) 216(1490) 248(1710) 0.500(12.70) 156(1075) 180(1240) 11 0.120(3.05) 210(1450) 241(1660) 0.562(14.27) 152(1045) 176(1210) 10 0.135(3.43) 206(1420) 237(1635) 0.625(15.88) 147(1015) 170(1170) 3.4 BEND TEST The wire must
9、withstand winding on its own diameter without cracking or breaking. 3.5 DIMENSION VARIATION The diameter of the wire shall not vary from that specified by more than the following: Size of Wire Allowable Variation 0.028 in (0.71 mm) - 0.075 in (1.90 mm) +/- 0.001 in (0.03 mm) 0.076 in (1.93 mm) - 0.3
10、75 in (9.53 mm) +/- 0.002 in (0.05 mm) 0.376 in (9.55 mm) and over +/- 0.003 in (0.08 mm) The wire shall not be out of round more than one half the total permissible variations prescribed in the first part of this paragraph. 3.6 WORKMANSHIP The wire shall be uniform in quality and temper and shall n
11、ot be wavy or crooked. Each bundle shall be one continuous length of wire, properly coiled, and firmly tied. 3.7 SURFACE CONDITION The surface of the wire as received shall be free from rust and excessive scale. The surface of the wire shall be free from serious seams and deep scratches which will m
12、aterially affect the quality of the finished product. ENGINEERING MATERIAL SPECIFICATION ESB-M1A138-A Page 3 of 3 Copyright 2002, Ford Global Technologies, Inc. 3.8 FINISH Wire supplied to this specification shall have a commercial bright finish which consists of a clean surface with only a small amount of drawing lubricants remaining unless otherwise specified.
