321 Stainless Steel Flat Rolled Coil

Type 321 (UNS S32100) is an austenitic flat rolled coil stainless steel that has fives times more titanium than carbon in its content. The increased titanium level aids in preventing carbide precipitation during welding. As a result, Type 321 is both creep resistant and resistant to oxidation.

321 stainless steel flat rolled coil is generally used in applications that require sustainability to high intermittent temperatures.

321 Stainless Steel Specifications:

ASTM A240 for annealed condition
ASTM A666 for tempered material*

Composition per ASTM A240
Carbon .08 Max
Manganese 2.00 Max
Phosphorus .045 Max
Sulfur .030 Max
Silicon .75 Max
Chromium 17.00 – 19.00
Nickel 9.00 – 12.00
Nitrogen .10 Max
Mechanical Properties (Annealed, Per ASTM A240)
UTS 75,000 ksi Min
Elongation % in 2″ 40.00 Min
Rockwell Hardness RB95.00 Max

* Tempered mechanical properties are available upon request.

321 Stainless Steel Applications:


  • Aircraft exhaust manifolds and flanges
  • Jet engine parts


  • Diesel and heavy duty exhaust systems
  • Heat exchangers

Chemical Processing

  • Chemical handling equipment
  • Oil refinery equipment


  • Firewalls

Magnetic Properties:

321 rolled coil stainless steel is generally non-magnetic.


Type 321 can be easily formed and drawn, but it may require re-annealing after forming and drawing.

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