321 Stainless Steel | 321 Tubing

Shapes Available

  • Coil
  • Pipe
  • Round Bar
  • Sheet
  • Tubing


  • Aerospace
  • Manufacturing
  • Oil Refining


  • Stainless Steel


  • AMS 5510
  • UNS S32100


  • Aircraft Piston Engine Manifolds
  • Chemical Process Equipment
  • Expansion Joints
  • High Temperature
  • Refinery Equipment
  • Thermal Oxidizers


  • Oxidation Resistant to 1600°F
  • Resists Acid Stress Corrosion Cracking
  • Stabilized against weld heat affected zone (HAZ) integranular corrosion

321 Stainless Steel is an austenitic stainless steel that is stabilized with titanium. 321 also contains chromium as well as nickel and in addition to the titanium, provides improved inter-granular corrosion resistance. 321 in non-magnetic w/similar corrosion resistance to type 304. This material is used for welded equipment that can’t be annealed. In addition, it’s used for equipment that is operated between 800 and 1500°F.

321 is available in round bar, plate, pipe, sheet, tubing, coil and pipe. For any 321 stainless steel needs please call Michlin Metals. For more info on this as well as other Austenitic Stainless Steels check out a video on just that topic below:

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Metal Properties
Density .286 lb/inch³
Elongation 40 %
Hardness Max, Brinell 217
Ultimate Tensile Strength 75 ksi
Chemical Composition
C- 0.08
Cr17.0 19.0
Fe- Balance
Mn- 2.0
N- 0.10
Ni9.0 12.0
P- 0.045
S- 0.03
Si- 0.75
Ti- 0.70
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