309 Stainless Steel

309 Stainless Steel Material Grade
309 SS Info Sheet

309 Stainless Steel

Products Offered in 309 stainless steel:

We also offer safety grating, hex metal, FRP grating and custom fabrication of all of our products.

Principal Design Features: This alloy, 309 Stainless Steel, is known for good strength and oxidation resistance in continuous service temperatures up to 2000 F (1093 C). It is superior to 304 stainless in both strength and corrosion resistance.

Applications: Oven linings, boiler baffles, fire box sheets, furnace components and other high temperature containers.

Machinability: This alloy machines similarly to type 304 stainless. Its chips are stringy and it will work harden rapidly. It is necessary to keep the tool cutting at all times and use chip breakers.

Welding: Most of the austenitic stainless steels can be readily welded using fusion or resistance methods. Oxyacetylene welding is not recommended. Filler metal should be AWS E/ER 309 or 309L.

309 Chemistry Data

Carbon0.2 max
Chromium22 - 24
Manganese2 max
Nickel12 - 15
Phosphorus0.045 max
Silicon1 max
Sulphur0.03 max

309 Physical Data

Density (lb / cu. in.)0.287
Specific Gravity7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])0.12
Electrical Resistivity (microhm-cm (at 68 Deg F))468
Melting Point (Deg F)2650
Modulus of Elasticity Tension29


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