310S Stainless Steel Composition & Heat-Resistant Properties

310S is a high-temperature austenitic stainless steel specified in ASTM A240 and GB/T 4237, containing approximately 24–26% chromium and 19–22% nickel. The elevated chromium and nickel levels give the grade outstanding oxidation resistance and structural stability at sustained service temperatures up to approximately 1000 °C.

The grade retains good creep strength and resists scaling under cyclic heating conditions, making it one of the most economical selections for furnace and thermal processing equipment. It is commonly used in furnace parts, burner components, annealing covers, heat exchanger tubes, and radiant tubes.

310S is available as plates, coils, and strips. It is widely used in heat treatment plants, petrochemical furnaces, cement kilns, and power generation installations where continuous thermal exposure is the primary design condition.