200 Series—These are austenitic stainless steel alloys. These materials are non-magnetic and have high strength with exceleent formability.
- Type 201
- Type 202
- Type 203
- Type 204
- Type 205
300 Series—These are austenitic stainless steel alloys. These materialsare non-magnetic and has good formability.
- Type 301
- Type 302— same as 304 but with higher strength.
- Type 303— has a higher iron content than 304.
- Type 304— the most common grade of stainless steel.
- Type 304L— contains less carbon than 304.
- Type 308
- Type 309
- Type 316—the second most common grade of stainless steel.
- Type 321—similar to 304
400 Series—These are ferritic and martensitic chromium stainless steel alloys.
- Type 405
- Type 408
- Type 409
- Type 410
- Type 416r
- Type 420—great polishability for 400 alloys.
- Type 430
- Type 440—one of the hardest stainless steels alloys.
- Type 446
Precipitation Hardening Series--These are either martensitic
or austenitic stainless steel alloys.
- Type 15-5
- Type 15-7
- Type 17-4
- Type 17-7
Duplex--These are more stress resistant alloys, and has a composition of chromium, nickel, and molybdenum.
- Type 329
- Type 2205
- Type 2304
- Type 2507
- Type 3RE60
Content courtesy of Electropolish.com.