HAYNES 242
HAYNES 242
List of Features
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
| Hardness (HRBW) | Form |
| 92 | Sheet |
| 94 | Plate |
| 90 | Bar |
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