Haynes 242

Catalog : Haynes 242

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Haynes 242

HAYNES® 242® alloy (UNS N10242) is an age-hardenable nickel-molybdenum chromium alloy which derives its strength from a long-range ordering reaction upon aging. It has tensile and creep strength properties up to 1200 – 1300°F (649 – 704°C) which are as much as double those for solid solution strengthened alloys, but with high ductility in the aged condition. The thermal expansion characteristics of 242® alloy are much lower than those for most other alloys, and it has very good oxidation resistance up to 1500°F (816°C). Other attractive features include excellent low cycle fatigue properties, very good thermal stability, and resistance to high-temperature fluorine and fluoride environments. HAYNES® 244® alloy has been developed as an upgrade from 242® alloy, with enhanced tensile and creep properties up to 1400°F (760°C), as well as a lower coefficient of thermal expansion.

%Chemical Composition

B C Al Si Mn Co Fe Cr Mo Ni
(max) 0.006 (max) 0.03 (max) 0.5 (max) 0.8 (max) 0.8 (max) 1 (max) 2 8 25 Balance

Density & Melting Range

Melting Range (Celsius) Density
1375 – 1290 (g/cm) 9.05


Hardness (HRBW) Form
92 Sheet
94 Plate
90 Bar


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