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Meehanite Heat Resisting Types
(H Types)

Type HR is a strong, dense iron of high rigidity and excellent resistance to scaling under most conditions. It is nongrowing 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.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.

PROPERTY TYPE
HS
TYPE
HSV
TYPE
HR
TYPE
HE
Tensile Strength-psi 60/100,000 100/120,000 40,000 25,000
Modulus of Elasticity-psi 23,000,000 24,500,000 21,000,000 10,000,000
Elongation % 2-10 2-10    
Brinell Hardness (Nominal) 200 200 300 or over 170
Thermal Conductivity
50°/450°F. BTU/Hr/Sq.
Ft./Inch Thickness
  278 360 298
Coefficient of Thermal
Expansion Per °F. from
100° to 1000°F.
.00000700 .00000674 .00000743 .00000666
Machinability Good Good Difficult Good

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