Class	Grades			Nominal Composition	Typical Applications
	KS(STS)	JIS(SUS)	AISI(AISI)
Austenite	301	301	301	17Cr - 7Ni	Railway vehicles, Springs
	304	304	304	18Cr - 8Ni	Kitchen and Cookware
	304L	304L	304L	18Cr - 9Ni - LowC	Welded construction materials
	316	316	316	18Cr - 12Ni - 25Mo	Pulp industry equipments
	316L	316L	316L	8Cr - 12Ni - 2.5Mo - LowC	Chemical plant equipments
Ferrite	430	430	430	18Cr	Table wares, car parts
Martensite	420J2	420J2	420	13Cr - 0.3C	Blade Knives, Springs

System	Steel Types	Chemical composition(%)
		C	Cr	Ni	Si	P	Mn	S	Mo	ETC
Austenite	301	0.15MAX	16.0~18.0	6.0~8.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	-
	304	0.08MAX	18.0~20.0	8.0~10.5	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	-
	305	0.12MAX	17.0~19.0	10.5~13.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	-
	304J1	0.08MAX	15.0~18.0	6.0~9.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	Cu1.0~3.0
	304L	0.03MAX	18.0~20.0	9.0~13.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	aaa
	321	0.08MAX	17.0~19.0	9.0~13.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	Ti5 * C%min
	316	0.08MAX	16.0~18.0	10.0~14.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	-	aaa
	316L	0.03MAX	16.0~18.0	12.0~15.0	1.0MAX	0.45MAX	2.0MAX	0.03MAX	2.0~3.0	aaa
Ferrite	430	0.12MAX	16.0~18.0	aaa	0.75MAX	0.40MAX	1.0MAX	0.03MAX	-	aaa
	409L	0.03MAX	10.5~11.7	aaa	1.0MAX	0.40MAX	1.0MAX	0.03MAX	-	Ti6 * C%~0.75
Martensite	420J2	0.26~0.40	12.0~14.0	aaa	1.0MAX	0.40MAX	1.0MAX	0.03MAX	-	aaa

SYSTEM	Steel Types	Mechanical Property						Distinction	Use
		Y/S(N/mm2)	T/S(N/mm2)	E/L(%)	Hardness		Specific Gravity
					HrB	Hv
Austenite	301	205MIN	520MIN	40MIN	95MAX	218MAX	7.93	가공 경화성	Spiral spring, Spring, Wheel covers
	304	205MIN	520MIN	40MIN	90MAX	200MAX	7.93	일반용도	Food equipment, General chemical
	305	175MIN	480MIN	40MIN	90MAX	200MAX	7.93	저온가공 경화성	Video device
	304J1	155MIN	450MIN	40MIN	90MAX	200MAX	7.93	내응력 부식성	Deep drawing
	304L	175MIN	480MIN	40MIN	90MAX	200MAX	7.93	내입계 부식성	Part which cannot be subjected to postweld heat treatment
	321	205MIN	520MIN	40MIN	90MAX	200MAX	7.93	내열성	Chemical plant
	316	205MIN	520MIN	40MIN	90MAX	200MAX	7.98	304보다 내산화성 양호	materials resistant to milk and dairy products
	316L	175MIN	480MIN	40MIN	90MAX	200MAX	7.98	내입계 부식성	Oil refinery
Ferrite	430	205MIN	450MIN	22MIN	88MAX	200MAX	7.70	일반용도	Building interior finishing, Household utensils
	409L	175MIN	360MIN	25MIN	80MAX	175MAX	7.75	내산화성	Converter, Muffler
Martensite	420J2	225MIN	540MIN	18MIN	99MAX	247MAX	7.75	420J1보다 소입성 우수	Cutlery, valves, Straightedges

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