The key feature of 321 stainless is its resistance to inter-granular corrosion. It contains titanium, which stabilizes against chromium carbide formation. This material is also stronger than 304 stainless.
Typical Chemical Properties
321 Stainless Steel (annealed condition) | |
---|---|
Minimum Properties | |
Ultimate Tensile Strength, psi | 89,900 |
Yield Strength, psi | 34,800 |
Elongation | 45% |
Rockwell Hardness | B80 |
Chemistry | |
Iron (Fe) | 68% |
Carbon (C) | 0.08% |
Chrome (Cr) | 18% |
Manganese (Mn) | 2% |
Nickel (Ni) | 11% |
Phosphorus (P) | 0.045% max |
Sulphur (S) | 0.03% |
Silicon (Si) | 1% |
Titanium (Ti) | 0.15 |