• 309/309S Stainless Steel Plate

309/309S Stainless Steel Plate

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Product Details

We are a professional supplier of hot rolled 309/309S stainless steel plates, coils and cold rolled 309/309S stainless steel sheets and rolls with various size in plain and embossed patterns in China.


Product309/309S stainless steel plate
Finish2B, No.1, 1D, No.4, HL, 8K
Thickness0.4mm-50mm
Standard Width1000mm/1220mm/1500mm/1800mm
Standard Length2000mm/2440mm/3000mm/6000mm/Coil
StandardASTM A240M/A480M, JIS G4304, JIS G4305, EN 10088/3
Grade309/309S/SUH309/SUS309S/S30900/S30908/1.4833/
BrandTISCO, BISCO, KRUPP


General Properties

Alloy 309 (UNS S30900) is an austenitic stainless steel developed for use in high temperature corrosion resistance applications. The alloy resists oxidation up to 1900°F (1038°C) under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to approximately 1850°F (1010°C).

Because of its high chromium and low nickel content, Alloy 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The alloy is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. Alloy 309 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced.

When heated between 1202 – 1742°F (650 – 950°C) the alloy is subject to sigma phase precipitation. A solution annealing treatment at 2012 – 2102°F (1100 – 1150°C) will restore a degree of toughness.

309S (UNS S30908) is the low carbon version of the alloy. It is utilized for ease of fabrication. 309H (UNS S30909) is a high carbon modification developed for enhanced creep resistance. It most instances the grain size and carbon content of the plate can meet both the 309S and 309H requirements.

Alloy 309 can be easily welded and processed by standard shop fabrication practices.


Our service: The company has equipped with many international standard stainless steel processing facilities such as: Coil Leveling Machine, Edge Slitting Machine, Precision Water Jet Cutting Machine, Laser Cutting Machine, HL, NO.4 and 8K Polishing Machine, Embossing Machine and Bending Machine. Based on our large stock and advanced processing equipment, we can provide professional products and service for you with competitive price.


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