Grade 321 Stainless Steel – Titanium-Stabilized Weldable High-Temp Alloy

Description

Grade 321 is a titanium-stabilized austenitic stainless steel engineered to deliver exceptional intergranular corrosion resistance and high-temperature stability. With 17.0-19.0% chromium and 9.0-12.0% nickel, it shares the corrosion resistance of 304 series, while the 0.15-0.40% titanium addition forms stable carbides-preventing chromium depletion during welding and high-temperature exposure. Unlike standard 304, 321 maintains structural integrity at temperatures up to 800°C, making it ideal for welded components in thermal environments. Its non-magnetic properties and good formability further enhance its versatility across industrial applications.

Chemical Composition (wt%)

C ≤ 0.08, Cr: 17.00-19.00, Ni: 9.00-12.00, Ti: 0.15-0.40, Mn ≤ 2.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030

Mechanical Properties

Tensile Strength ≥ 515 MPa, Yield Strength ≥ 205 MPa, Elongation ≥ 40%, Hardness ≤ 201 HB

Advantages

Titanium-stabilized for superior intergranular corrosion resistance; excellent high-temperature creep resistance; non-magnetic; good weldability and formability; suitable for welded thermal applications.

Applications

Automotive exhaust systems, heat exchangers, boiler parts, aerospace components, and high-temperature welded structures.

Equivalent Grades

UNS S32100, EN 1.4878, GB 06Cr18Ni10Ti, SUS321

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.