SUS309S Stainless Steel Plate & Coil: High-CrNi Medium-High Temp Oxidation Resistant Plate/Coil

What is SUS309S Stainless Steel Plate & Coil?

SUS309S stainless steel plate & coil is a high-chromium-nickel austenitic product, engineered with elevated Cr and Ni content to enhance high-temperature oxidation resistance. It serves as a cost-effective solution for medium-high temperature industrial scenarios, balancing performance and economic efficiency for plate/coil processing and application.

Equivalent Grades (Horizontal)

UNS: S30908 | JIS: SUS309S | GB: 06Cr23Ni13 | EN: X5CrNi23-12 | W.Nr.: 1.4828

Chemical Composition (wt%, Horizontal)

C: ≤0.08 | Si: ≤1.00 | Mn: ≤2.00 | P: ≤0.045 | S: ≤0.030 | Cr: 22.00-24.00 | Ni: 12.00-15.00 | Fe: Balance

Key Properties (20°C, Annealed, Horizontal)

Density: 7.98g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: ≥515N/mm² | Yield Strength: ≥205N/mm² | Elongation: ≥40% | Hardness: ≤217HB

Core Characteristics

• Excellent high-temperature oxidation resistance: Forms a dense oxide film, enabling long-term service at up to 1050°C in oxidizing atmospheres, suitable for high-temp plate/coil components • Reliable high-temperature creep performance: Resists deformation under cyclic high-temperature stress, ensuring structural stability of processed plates and coils • Superior weldability and formability: Easy to cut, bend, roll and weld, adapting to complex plate/coil deep processing needs • Cost-efficient alternative to SUS310S: Ideal for medium-high temp non-severe corrosion scenarios like industrial furnace flues, boiler accessories and high-temp decorative panels

SUS309S vs SUS310S Stainless Steel Plate & Coil (Horizontal)

Cr Content: SUS309S (22.00-24.00%) | SUS310S (24.00-26.00%) | Ni Content: SUS309S (12.00-15.00%) | SUS310S (19.00-22.00%) | High-Temp Limit: SUS309S (≤1050°C) | SUS310S (≤1150°C) | Cost: SUS309S (Medium) | SUS310S (High)

 

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.