1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS D 7203 2:KS D 7203:2008 (NEQ ISO 4954:1993) 2008 6 5 http:/www.kats.go.krKS D 7203:2008 : ( ) ( ) () () () ( ) : (http:/www.standard.go.kr) : :2008 6 5 20080255 : : ( 025097274) (http:/www.kats.go.kr). 10 5 , . KS D 7203:2008 (NEQ ISO 4954:1993) 2: Boron
2、 steels for cold heading Part 2: Wires 1993 2 ISO 4954, Steels for cold heading and cold extruding . 1 , , , , ( .) . 2 . . KS B 0401, KS B 0801, KS B 0802, KS B 5202, KS D 0001, KS D 0216, KS D 3624, 1: 3 12 1 . KS D 7203:2008 2 1 ab abSWCHB 223 D : D DA : DA SWCHB 237 DA : DA SWCHB 420 SWCHB 526 S
3、WCHB 620 D : D DA : DA SWCHB 320 SWCHB 323 D : D DA : DA SWCHB 331 SWCHB 334 DA : DA SWCHB 623 SWCHB 726 SWCHB 734 DA : DA a KS D 3624 R . SWRCHB 223 SWCHB 223 bD . DA , . 4 KS D 3624 . 5 . a) D DA . , . b) . 6 10.2 , D 2, DA 3 . , D DA . KS D 7203:2008 3 2 D N/mm2 % ( ) HRB SWCHB 223 SWCHB 320 SWCH
4、B 323 SWCHB 420 SWCHB 526 SWCHB 620 750 45 100 1 20 mm 2 5 . , 3 mm . 2 1 N/mm2 MPa 3 DA N/mm2 % ( ) HRB SWCHB 223 610 93 SWCHB 237 670 96 SWCHB 320 600 92 SWCHB 323 610 93 SWCHB 331 630 94 SWCHB 334 650 95 SWCHB 420 600 92 SWCHB 526 650 SWCHB 620 630 94 SWCHB 623 640 SWCHB 726 650 95 SWCHB 734 680
5、55 97 1 20 mm 2 5 . , 3 mm . 2 1 N/mm2 MPa 7 7.1 , 10.3.1 4 . , 32 mm . KS D 7203:2008 4 4 : mm 15 0.02 0.15 15 25 0.03 0.20 25 32 0.04 0.25 7.2 DA , 10.3.2 . , 1 No.1 No.4 . 8 10.4 1) 5 . 5 : mm 3 0 0.025 0.013 3 6 0 0.030 0.015 6 10 0 0.036 0.018 10 18 0 0.043 0.022 18 30 0 0.070 0.035 30 40 0 0.1
6、00 0.050 40 50 0 0.150 0.070 9 a) b) . a) , , b) . b) 10.5 6 . , 7 . 1) , . KS D 7203:2008 5 6 : mm 50 0.10 7 ( ) : mm 15 0.05 15 25 0.07 10 10.1 , , , , 1 . 10.2 KS B 0802 . KS B 0801 9 . , 9 9A 9B . 10.3 10.3.1 KS D 0216 . , 4 . 10.3.2 400 1 No.1 No.4 . 10.4 KS B 5202 . 10.5 , , . 11 KS D 7203:200
7、8 6 . a) KS D 0001 . b) 10.2 6. . c) 10.3.1 7.1 . d) 10.3.2 7.2 . e) 10.4 8. . f) 10.5 9. . 12 1 . , . a) b) (D : D, DA : DA) c) d) e) f) g) h) 13 KS D 0001 9. . . KS D 7203:2008 7 400 No.1 No.2 No.3 No.4 1 KS D 7203:2008 8 KS D 7203:2008 . 1 , , , , ISO 4954, Steels for cold heading and cold extrud
8、ing “ 2: ”(KS D 7203) . 2 , , , , , . 3 ISO 4954, Steels for cold heading and cold extruding . 3.1 12 KS D 3624 R , . 3.2 KS D 3624 . 3.3 . a) D DA . , . b) . 3.4 a) D 2, DA 3 , KS D 7203:2008 9 . 3.5 , . 2: 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS D 7203:2008 (NEQ ISO 4954:1993)KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Boron steels for cold heading Part 2: Wires ICS 77.140.10; 77.140.20