Grade SUS304L Stainless Steel

Description

Grade SUS304L is the low-carbon variant of SUS304, designed specifically to eliminate intergranular corrosion after welding. With a maximum carbon content of 0.03%, it minimizes chromium carbide precipitation in the heat-affected zone during welding, eliminating the need for post-weld annealing. It retains the same chromium and nickel content as SUS304, maintaining excellent formability, toughness, and general corrosion resistance. Unlike SUS304, SUS304L is more suitable for heavy-section welded components that cannot be heat-treated after fabrication. It offers consistent performance in chemical, pharmaceutical, and food-processing equipment where corrosion resistance after welding is a critical concern, providing a more reliable solution than standard SUS304 in welded structures.

Chemical Composition (wt%)

C ≤ 0.03, Cr: 18.00-20.00, Ni: 8.00-11.00, Mn ≤ 2.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030

Mechanical Properties

Tensile Strength ≥ 480 MPa, Yield Strength ≥ 175 MPa, Elongation ≥ 40%, Hardness ≤ 200 HB

Advantages

Superior intergranular corrosion resistance after welding compared to SUS304; excellent weldability without sensitization; good ductility and fabrication characteristics; non-magnetic; suitable for welded structures.

Applications

Welded pressure vessels, chemical tanks, piping systems, pharmaceutical equipment, food processing pipelines, and large welded structural parts requiring post-weld corrosion resistance.

Equivalent Grades

AISI 304L, UNS S30403, EN 1.4307, GB 022Cr19Ni10

 

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.