1、 ENGINEERING STANDARDS Material Specification SUPERCEDED EDS-M-1502 Free Cutting Carbon Steels This standard may be applied only for current project. It is Superceded for all future projects and replaced by SAE J403. 1 I8 Note: 8 E:48t G8 =9 7 FF7 957%L+ , FG P-P Program .Bd# SAE J403 8p) $4=F7 957F
2、$ . Copyright 2011 General Motors Company All Rights Reserved April 2011 Originating Department: GM Korea Engineering Standards Page 1 of 7 Version : 5 1 Scope 1.1 Material Description. This standard specifies the free cutting carbon steel with good machinability used by GM Korea Company (hereinafte
3、r referred to as the “GM Korea“). 1.1.1 Type and Use (Reference). 1 P7 1.1 8: 8-L C2e . 8 8t GM Korea Company (8F “$-1 ( F )72P 17F# Fp12e8 73LF 1I87 $4F7 9IF$ . 1.1.1 9* -C 7$ (=l ). Table 1: Type and Use / E 1: 9* -C 7$ Type / 9* Uses / 7$ Applications / 957 707 38%P E:48x 957F$ . 2.1 17 E:4 / . I
4、SO 643 ISO 4967 ISO 6507 2.2 GM E:4 / . EDS-T-7139 GMW3059 2.3 dA E:4 / . TMC003 Material Safety Data Sheet guidance documents GM KOREA ENGINEERING STANDARDS EDS-M-1502 Copyright 2011 General Motors Company All Rights Reserved April 2011 Page 2 of 7 Version : 5 3 Requirements 3.1 Chemical Compositio
5、n. 3 7 1F 3.1 GF 2e. . Table 2: Chemical Composition (Unit: wt%) / E 2: GF 2e. ($88 : wt%) Type / 9* C Mn P S Pb SUM 21 0.13 max. / 0.13 8F 0.70 ) 1.00 0.07 ) 0.12 0.16 ) 0.23 - SUM 22 0.13 max. / 0.13 8F 0.70 ) 1.00 0.07 ) 0.12 0.24 ) 0.33 - SUM 23L 0.09 max. / 0.09 8F 0.75 ) 1.05 0.04 ) 0.09 0.26
6、) 0.35 0.10 ) 0.35 SUM 24L 0.15 max. / 0.15 8F 0.85 ) 1.15 0.04 ) 0.09 0.26 ) 0.35 0.10 ) 0.35 SUM 42 0.37 ) 0.45 1.35 ) 1.65 0.04 max. / 0.04 8F 0.08 ) 0.13 - SUM 43 0.40 ) 0.48 1.35 ) 1.65 0.04 max. / 0.04 8F 0.24 ) 0.33 - Remark: In principle, Si shall not be specified, but its range may be selec
7、ted among 0.10% or less, 0.10 ) 0.20%, 0.15 ) 0.35%, etc. through an agreement with the purchaser if necessary. / /x : Si# 8?958p) 9PF: 68p! , Fx74 +87t GE87 !88-P /x 3: 1d $8A# 20 30 mm (3/4 5/4 in)8 .=I8x E:44G D 50 mm (2 in)8p) FF 88 4G 08$ . 20 mm 8F8 7 , I$4 $2 “ , 32 mm 818 77# A d7 &d( 68 94F
8、%P$ . !88-P 1B8 2e:8t 7(867$ .=I8p).Bd B18 !8 8-P8x FF 78 8p) , !8 8-P0 7(=* 97 &d( $ (:# 9D7 8T8 F7 6 F$ . /x 4: 88I$ , F.)I$8 3L?# psi* into kgf/mm2) G1F74$ . Appendix Table 2: Machinability Ratio of Cold Drawn Carbon Steel / .E 2: !8 8-PF A2I8 Fp18 SAE/AISI 1212 1213 23L14 1141 1144 Machinability
9、 ratio (%) / Fp18 (%) 100 135 160 70 80 EDS-M-1502 SUM21 SUM22 SUM24L SUM42 SUM43 Remark 1: Reference. SAE Hand Book(1996), SAE J1397. Remark 2: Machinability Ratio. The ratio where SAE 1212(cold drawing) = 100% when wet-turned with high-speed steel tools. / /x 1: =l ,lG . SAE Hand Book(1996), SAE J1397. /x 2: Fp18 . 2$I ) ) 342T1F 7)4 SAE 1212(!88-P ) = 100 %) F &8 /x88$ .
