Quick answer: 310 and 310S are high-chromium, high-nickel austenitic stainless steels selected mainly for oxidation resistance at elevated temperature. Typical uses include furnace parts, heat-treatment fixtures, burner components and high-temperature process equipment. They are not automatically suitable for every hot, carburizing, sulfur-bearing or thermal-cycling environment.
Both grades use chromium and nickel to support high-temperature oxidation resistance. 310S has a lower maximum carbon content than 310, which can be preferred where welding and sensitization control are important. This does not mean 310S is always the stronger or better choice at service temperature; use the governing product and design specification.
Furnace linings, radiant tubes, burner parts, baffles, trays, baskets and fixtures may use 310/310S where temperature, atmosphere and mechanical loading are appropriate. Allowance is required for thermal expansion, creep and repeated heating cycles.
High-temperature ducting, tube supports, refractory anchors, combustion-system components and selected process-vessel internals are possible applications. Welding consumables, joint design and post-fabrication cleaning must match the service.
Some hot-processing equipment uses 310S, but corrosion resistance in wet chemical service should be checked separately. Elevated-temperature oxidation resistance does not guarantee resistance to chlorides, reducing acids or all sulfur-containing gases.
Published maximum-temperature figures are guidance under specific test conditions, not universal design limits. Component thickness, atmosphere, scale spallation and stress can control actual performance.
State grade, product form, applicable ASTM/EN standard, dimensions, quantity, surface condition, operating temperature range, atmosphere, fabrication route, inspection and documentation. Review 310 and 310S stainless steel product options where available.