321
321 is commonly used for service in the 1000-1600⁰ F temperature range, as it is stabilized with titanium. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S32100.
Mechanical Properties* (in annealed condition)
| Properties | Unit of Measure | 321 |
|---|---|---|
| Tensile Strength | ksi | 75 min |
| 0.2% Yield Strength | ksi | 30 min |
| Elongation | % | 40 min |
| Hardness | HV | 95 max |
*Nominal Room Temperature Mechanical Properties. Typical Data. Not suitable for design or specifications.
Composition
| Element | 321 | |
|---|---|---|
| Cr | Chromium | 17.0-19.0 |
| Ni | Nickel | 9.0-12.0 |
| Mo | Molybdenum | 0.750 max |
| Mn | Manganese | 2.000 max |
| Si | Silicon | 0.25-1.00 |
| P | Phosphorus | 0.040 max |
| C | Carbon | 0.080 max |
| S | Sulfur | 0.030 max |
| N | Nitrogen | 0.100 max |
| Cu | Copper | 0.750 max |
| Ti | Titanium | min 5x(C+N), max 0.700 |
| Fe | Iron | Balance |