Stainless Steel

Stainless steel is a corrosion-resistant alloy composed of iron, chromium, and other elements, known for its strength, durability, and resistance to rust. It is widely used in industries like construction, food processing, aerospace, and medical. Stainless steel grades include austenitic, ferritic, martensitic, duplex, and precipitation-hardened types, each offering unique properties. Available in forms such as sheets, plates, pipes, and bars, it conforms to standards like ASTM and EN.

Standard	Specification Numbers
ASTM	A312, A376, A358, A269, A249, A403, A182, A351
ASME	SA312, SA376, SA358, SA269, SA249, SA403, SA182, SA351

Grade	C	Cr	Ni	Mo	Others
304	0.08	18.0 ~ 20.0	8.00 ~ 10.50	-	-
304L	~0.030	18.0 ~ 20.0	9.00 ~ 13.00	-	-
310S	~0.08	24.0 ~ 26.0	19.0 ~ 22.0	-	-
316	~0.08	16.0 ~ 18.0	10.0 ~ 14.0	2.00 ~ 3.00	-
316L	~0.08	16.0 ~ 18.0	12.0 ~ 15.0	2.00 ~ 3.00	-
316Ti	0.08	16.0 ~ 18.0	10.0 ~ 14.0	2.00 ~ 3.00	Ti 5xC% ~
317L	0.03	18.0 ~ 22.0	11.0 ~ 15.0	3.00 ~ 4.00	-
321	~0.08	17.0 ~ 19.0	9.00 ~ 13.0	-	Ti 5xC% ~
347	0.08	17.0 ~ 19.0	9.00 ~ 13.0	-	Nb 10xC% ~

Grade	Yield Strength (0.2%) (N/mm²)	Tensile Strength (N/mm²)	Elongation (%)	Hardness (Hv)
304	205~	520~	40~	~200
304L	175~	480~	40~	~200
310S	205~	520~	40~	~200
316	205~	520~	40~	~200
316L	175~	480~	40~	~200
316Ti	205~	520~	40~	~200
317L	175~	480~	40~	~200
321	205~	520~	40~	~200
347	205~	520~	40~	~200

Grade	Specific Heat (J/g °C)	Specific Gravity	Thermal Expansion Coefficient (W/m·°C, 20–100°C)	Thermal Conductivity (W/m·°C, 100°C)
304	0.50	7.93	17.3	16.3
304L	0.50	7.93	17.3	16.3
310S	0.50	7.98	15.9	14.2
316	0.50	7.98	15.9	16.3
316L	0.50	7.98	15.9	16.3
316Ti	0.50	7.98	15.9	16.3
317L	0.486	7.98	16.5	14.4
321	0.50	7.93	16.7	16.1
347	0.50	7.98	16.7	16.1