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Type HS compares very favorably from a strength standpoint with any heat resisting metal and is recommended for applications at temperatures up to 1800 degrees F under both conditions of cyclic and continuous heating without thermal shock. Compositional adjustments are made to suit the exact service conditions. It machines easily and provides maximum resistance to scaling and growth. Recommended for blast furnace parts, hot gas valves, doors, frames, annealing pots.

Type HSV is an iron developed essentially for engineering parts that are subjected to long continuous heating at temperatures up to 1600 degrees F. It has been designed to have the maximum load bearing ability.

Type HR is a strong, dense iron of high rigidity and excellent resistance to scaling under most conditions. It is non-growing for temperatures up to 1350 degrees F and possesses good load carrying ability.

Recommended for service conditions without thermal shock such as furnace parts, retorts, tube support, etc.

Type HS is a freely machinable material in the as-cast condition. Withstands rapid heating and cooling without premature failure, offers good dimensional stability and a good range of strength properties. Recommended for ingot molds, slag pots, hot plates, and parts heated rapidly by a naked flame.