321 Stainless Steel
321 Stainless Steel is a titanium stabilized chromium nickel austenitic stainless steel with corrosion resistance similar to 304/304L.
This grade is typically used in the 800-1500˚F temperature range where it is stabilized against chromium carbide precipitation by the addition of titanium, which results in the precipitation of titanium carbides.
321 Stainless Steel has excellent intergranular corrosion resistance after exposure to this temperature range, and this grade resists oxidation up to 1500˚F and has higher creep and stress rupture properties than 304 SS. It also possesses good low temperature toughness and is non-magnetic in the annealed condition.
Product Forms & Size Range
321 Stainless Round Bar diameters range from 0.125″ to 14.00″ diameter.
flat bar comes in a variety of thicknesses and widths. For more information please request a quote.
321 Stainless Plate Thickness ranges from 0.1875″ to 6.50″ Thick.
Sheet Thicknesses range from 0.0010″ to .170″ Thick.
Applications of 321 Stainless Steel
- Aerospace and Jet Engines: Exhaust manifolds, afterburner components, heat shields, and jet turbine casings.
- Chemical Processing Equipment: Reactors, heat exchangers, and piping systems exposed to elevated temperature corrosives.
- Automotive and Motorsport: Exhaust systems and manifolds requiring sustained strength under heat cycling.
- Oil & Gas: Tubing, fittings, and components exposed to corrosive media and heat.
- Power Generation: Gas turbine components and boiler casings.
321 STAINLESS STEEL SPECIFICATIONS
SHEET SOLUTION HEAT TREATED
Annealed sheets offering excellent corrosion resistance and formability for demanding applications.
TUBING
Precision tubes designed for corrosion resistance and mechanical reliability in fluid systems.
321 BARS & FORGINGS
High-quality bars and forgings suitable for structural, machined, and high-stress components.
FEDERAL & MILITARY SPECIFICATIONS
Government-certified sheets ensuring performance and durability under critical service conditions.
OIL & GAS
Materials engineered to withstand sour gas, chloride stress, and harsh operating environments.
Certified Material for Critical Service
Materials produced and supplied to AMS 5510, AMS 5645, AMS 5689, and related specifications can be delivered with:
- Certificates of Compliance (CoC) confirming adherence to AMS and ASTM standards.
- Mill Test Reports (MTRs) specifying chemical composition, mechanical properties, and heat-treatment data.
- Traceability documentation from melt source to final product batch.
Such certification is essential for aerospace, oil & gas, and defense applications, where traceable quality assurance is required for safety and regulatory compliance.