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Common types of 200 series stainless steel sheet

Grade	Application
301	High strength grade, with resistance to atmosphere corrosion.  Its bright, attractive surface make it an excellent choice for decorative structural applications.
304	Used for a wide variety of home and commercial applications. One of the most familiar & frequently used alloys in the stainless steel family. Common applications include Sanitary, Cryogenic, and Pressure-containing applications, Home and commercial appliances, Tank structural parts and processing equipment
309	Used for elevated temperature applications, including Furnace parts – conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, baskets and trays to hold small parts; Containers for hot concentrated acids, ammonia and sulfur dioxide; contact with hot acetic and citric acid.
310/S	Corrosion resistant, including furnace parts such as conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, and baskets and trays to hold small parts. Chemical process industry to contain hot concentrated acids, ammonia, and sulfur dioxide and in the food processing industry, they are used in contact with hot acetic and citric acid
316	Used for elevated temperature applications, including handling hot organic and fatty acids, boat rails and hardware and facades of buildings near the ocean
321	A stabilized stainless steel which offers excellent resistance to corrosion following exposure to temperature between 800-1500 Deg F. Applications include Boiler and Pressure Vessels

Chemical Composition

Grade	C	Si	Mn	P≤	S≤	Cr	Mo	Ni	Other
301	≤0.15	≤1.00	≤2.00	0.045	0.03	16-18	-	6.0	-
304	≤0.07	≤1.00	≤2.00	0.035	0.03	17-19	-	8.0	-
304L	≤0.075	≤1.00	≤2.00	0.045	0.03	17-19	-	8.0
309S	≤0.08	≤1.00	≤2.00	0.045	0.03	22-24	-	12.0	-
310	≤0.08	≤1.5	≤2.00	0.045	0.03	24-26	-	19.0	-
316	≤0.08	≤1.00	≤2.00	0.045	0.03	16-18.5	2	10.0	-
316L	≤0.03	≤1.00	≤2.00	0.045	0.03	16-18	2	10.0	-
321	≤0.12	≤1.00	≤2.00	0.045	0.03	17-19	-	9.0	Ti≥5×C

Mechanical Properties

Grade	YS(Mpa) ≥	TS (Mpa) ≥	El (%) ≥	Hardness(HV) ≤
301	200	520	40	180
304	200	520	50	165-175
304L	175	480	50	180
309S	200	520	40	180
310	200	520	40	180
316	200	520	50	180
316L	200	480	50	180
321	200	520	40	180

Specification

Grade	301,304,304l,321,316,316l,309s,310
Thickness	Cold rolled:0.2-3.0mm Hot rolled:3.0-60mm
Length	As customer’s requirement
Surface Finish	2B,2D,BA,NO4, Hair Line,6K, etc
Manufacture Technology	Cold rolled/ Hot rolled
Material	DDQ, High Copper, Half Copper or Low Copper Material
Standard	JIS, ASTM, AISI, GB, DIN, EN, etc we usually use ASTM and GB Standard

Surface Treatment

Name	Feature	Specification
2B	Bright	After cold rolling ,by heat treatment ,pickling or other equivalent treatment and lastly by cold rolling to given appropriate luster.
BA	Polishing ,mirror	Processed with bright heat treatment after cold rolling
Hairline	Line like hair	Hair grain grinding by appropriate particle size of material
6K/8K	Mirror, brighter than BA	Very bright, grinding and polishing surface by 1000# strop grain of abrasive belt

Application
Petroleum and chemical industry equipment,industrial tanks, war and electricity industries; Medical instruments,tableware,kitchen utensil,kitchen ware; Construction field, milk or food processing facilities, boiler heat exchanger; Architectural purposes, escalators, kitchen ware, vehicles, machinery and hardware fields. Petroleum and chemical industry equipment,industrial tanks, war and electricity industries; Medical instruments,tableware,kitchen utensil,kitchen ware; Construction field, milk or food processing facilities, boiler heat exchanger; Architectural purposes, escalators, kitchen ware, vehicles, machinery and hardware fields.