303 is one of the most popular of all the free machining stainless steels. It offers good strength, corrosion resistance and great machinability. It is designed to resist scaling at temperatures up to 1600 F. 303SE is a modification of basic 303 that substitutes selenium for sulfur as an aid to machining. It offers good strength, corrosion resistance and great machinability. It will resist scaling at temperatures up to 1600 F. It commonly is used in parts requiring cold forming after machining. Used in an wide variety of parts in the screw and general machining industries. Applications include hardware, fasteners, valve parts, nozzles and trim.
| Specification | Description |
|---|---|
| AMS 5640 | Stainless Steel Bars, Forgings, and Wire. |
| AMS 5641 | Stainless Steel Bars, Forgings, and Wire. |
| ASTM A582 | Stainless Steel Bars and Forgings. |
| MIL-S-7720 | Stainless Steel Bars, Forgings, and Wire. Aircraft Quality. 18-8 |
| QQ-S-764 | Stainless Steel Bars. |