321 stainless steel specification is following:
321stainless steel is a stabilized stainless steel which offers as its main advantage an excellent resistance to inter-granular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500° F (427 to 816° C). 321 stainless steel is stabilized against chromium carbide formation by the addition of titanium.
321 stainless steel chemical composition
| Grade | C % | Cr % | Ni % | Mn % | P % | S % | Si % | N % | Ti |
| 321 | ≤0.08 | 17.0-19.0 | 9.0-12.0 | ≤2.00 | ≤ 0.045 | ≤ 0.03 | ≤ 0.75 | ≤ 0.10 | 5*(C+N)-0.70 |
321 stainless steel mechanical properties
| Grade | Yield strength | Tensile strength | Elongation δ5 | Hardness |
| σs MPa | σb MPa | % | HB | |
| 321 | ≥205 | ≥515 | ≥40 | ≤217 |
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