High carbon steel

COLD ROLLED HIGH CARBON STEEL STRIP

Mechanical Properties
강종 Classification	조질기호	A			S	R
	기호＼구분 Symbol	(소둔상태)			(Skin Pass 상태)	(압연상태)
	기호＼구분 Symbol	경도(Hv) HARDNESS	Tensile strength (㎏f/㎟)	연신율(%) Elongation	경도(Hv) HARDNESS	경도(Hv) HARDNESS
탄소강대 CARBON STEEL	S30CM S35CM S45CM	140 – 150 140 – 150 140 – 160	45 Max 45 Max 50 Max	30 Max 27 Min 27 Min	150 Max 150 Max 160 Max	150 – 250 150 – 250 150 – 260
탄소강대 CARBON STEEL	S50CM S55CM S60CM	140 – 160 150 – 170 150 – 170	55 Max 55 Max 55 Max	27 Min 27 Min 25 Min	160 Max 170 Max 170 Max	150 – 260 150 – 250 170 – 260
공구강대 TOOL STEEL	SK3M SK4M SK5M	180 – 220 180 – 200 170 – 200	60 – 70 50 – 70 50 – 70	15 Min 20 Min 20 Min	220 Max 210 Max 210 Max	220 – 280 210 – 270 210 – 270
스프링강대 SPRING STEEL	SUP6M SUP9M SUP10M	210 Max 200 Max 200 Max				210 – 310 200 – 290 200 – 290
망간강대 MANGANESE STEEL	SMn420M SMn433M	160 Max 170 Max				160 – 240 170 – 250
크롬몰리브덴 강대 CHROMIUM MOLYBDENUM STEEL	SCM415M SCM420M SCM435M SCM440M	SCM415M 180 Max 190 Max 200 Max				170 – 240 180 – 250 190 – 270 200 – 280