SUS321 Austenitic Stainless Steel – Titanium-Stabilized Weldable Heat-Grade Alloy

Product Introduction

SUS321 is a titanium-stabilized austenitic stainless steel in the SUS series, developed to deliver superior intergranular corrosion resistance and high-temperature stability. Containing 0.15-0.40% titanium, this grade binds with carbon to prevent chromium carbide precipitation, eliminating sensitization during welding and heating. It features a SUS304-like chromium-nickel composition, offering general corrosion resistance comparable to SUS304, with enhanced creep strength at temperatures up to 800°C. Non-magnetic and highly weldable, it is the preferred choice for high-temperature welded components requiring long-term corrosion integrity.

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 (Annealed State)

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

Core Advantages

Titanium stabilization eliminates sensitization; excellent intergranular corrosion resistance; superior high-temperature creep strength; non-magnetic; exceptional weldability; stable performance in thermal-cycling environments.

Typical Applications

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

Equivalent Grades

AISI 321, UNS S32100, EN 1.4878, GB 06Cr18Ni10Ti

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.