321 Stainless Steel Bar

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.


  • Jet engine parts
  • Heat treated parts
  • Expansion joints
  • Turbo superchargers
  • Exhaust manifolds.
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
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

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