Type 309 Stainless Steel

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Elements (Max.) C Mn P S Si Cr Ni .20 2.00 .045 .03 .75 22/24 12/15

Type 309 is a high chromium and nickel content stainless steel that has excellent corrosion resistance as well as high creep strength and mechanical properties at elevated temperatures and excellent oxidation resistance at temperatures up to approximately 2000 Deg. F.

Applications: Used primarily for high temperature structural applications where good strength and resistance to oxidation at elevated temperatures are required. Uses include furnace parts such as dampers, baffle plates, supports, and fixtures. It is also used in chemical plant equipmentfor handling of acids, sulfite liquors, etc.

Corrosion Resistance: Type 309 has better corrosion resistance than Type 304, and for resistance to specific corrosive media may be compared to Type 304.

Resistance To Scaling: Excellent scale resistance at temperatures up to 2O00 Deg. F for continuous service, up to 1800 Deg. F for intermittent service.

Weldability: Easily welded by all commercial processes except forge or hammer welding. For maximum corrosion resistance annealing is recommended after welding.

Forming: Good drawing and stamping properties.

Annealing: Annealing range is between 1900 and 2050 Deg. F cool rapidly. Water quench heavier sections. Thin sections may be air cooled.

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