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.
