... parts, processing equipment, and tubing321(S32100)C 0.08 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max ... ASTM A2408.03515 min205 min40min95 Rockwell B maxFurnace parts - conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, ... tube hangers, baskets and trays to hold small parts; containers for hot concentrated acids, ammonia and sulfer dioxide; ...