... min205 min40min95 Rockwell B maxFurnace parts - conveyor belts, rollers, burner parts, refractory supports, retorts and oven ... concentrated acids, ammonia and sulfer dioxide; contact with hot acetic and citric acid.310/310S(S31000 ... Rockwell B maxFurnace parts such as conveyor belts, rollers, burner parts, refractory supports, retorts and oven ... they are used in contact with hot acetic and citric acid