321 Stainless Steel

UNS S32100 stainless
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Titanium-stabilised austenitic stainless steel designed to resist sensitisation and intergranular corrosion when welded or used in the 425–850°C range.

Applicable Standards

  • ASTM A240
  • ASTM A269
  • ASTM A312
  • EN 1.4541

Composition Ranges (wt %)

Element Min (%) Max (%) Typical Range
Fe 60.0 75.0 ~67.5
Cr 17.0 19.0 ~18.0
Ni 9.0 12.0 ~10.5
Ti 0.15 0.7 ~0.42
Mn — 2.0 ~1.0
C — 0.08 ~0.04
Fe 60.0–75.0% Cr 17.0–19.0% Ni 9.0–12.0% Ti 0.15–0.7% Mn 0.0–2.0% C 0.0–0.08%

Typical Applications

  • Aircraft exhaust manifolds
  • Welded assemblies in corrosive service
  • High-temperature chemical equipment
  • Expansion joints
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