| AISI | Characteristics |
|---|---|
| 301 | High work-hardening rate; applications requiring high strength and ductility. |
| 302 | Higher carbon modification of Type 304 for higher strength on cold rolling. |
| 303 | Free machining sulfur modification of Type 302. |
| 303Se | Free machining selenium modification of Type 302. |
| 304 | General purpose austenitic grade for enhanced corrosion resistance. |
| 304L | Low-carbon modification of Type 304 for welding applications. |
| 305 | Low work-hardening rate; spin forming and severe spin drawing operations. |
| 309 | High-temperature strength and oxidation resistance. |
| 309S | Low-carbon modification of Type 309 for welded construction. |
| 310 | High-temperature strength and oxidation resistance greater than Type 309. |
| 310S | Low-carbon modification of Type 310 for welded construction. |
| 314 | Increased oxidation resistance over Type 310. |
| 316 | Mo added to improve corrosion resistance in reducing environments; improved creep resistance over Type 302. |
| 316L | Low-carbon modification of Type 316 for welded construction. |
| 317 | Increased Mo to improve corrosion resistance over Type 316 in reducing media. |
| 321 | Titanium stabilized for service in 800 to 1600°F range and to minimize carbide precipitation when welding for resistance to intergranular corrosion. |
| 347 | Columbium stabilized for service in 800 to 1600°F range and to minimize carbide precipitation when welding for resistance to intergranular corrosion. |
steels should be employed, except in atomic hydrogen or inert-gas-shielded arc welding. Spot and roll seam welding also are used to a considerable extent.
Brazing — Special techniques have been developed for silver-soldering and brazing these steels. Solders and fluxes especially designed should be used, surfaces must be thoroughly cleaned, and close control of temperature must be followed.