Haynes 244

Catalog : Haynes 244

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Haynes 244

HAYNES® 244® alloy is a new Ni-Mo-Cr-W alloy developed for static parts in advanced gas turbine engines which require low thermal expansion at temperatures up to 1400°F (760°C). It offers a higher maximum use temperature than other low thermal expansion alloys currently available, including a 100-200°F (55-110°C) improvement over HAYNES® 242® alloy. The alloy is age-hardenable by formation of Ni2 (Cr,Mo,W) domains, which are structurally similar to the strengthening domains in 242® alloy. Judicious alloying with tungsten increased the thermal stability of these domains and lowered the coefficient of thermal expansion. Other important properties such as oxidation resistance and low-cycle fatigue performance are comparable or better than those of 242® alloy.

%Chemical Composition

W Mo Mn Fe Cr C Al Ni
6 22.5 (max) 0.8 (max) 2 8 (max) 0.03 (max) 0.5 Balance

Density & Melting Range

Melting Range (Celsius) Density
1400 – 1360 (g/cm) 9.33


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