HAYNES® 242® alloy is a unique, age-hardenable alloy that combines relatively low thermal expansion characteristics with outstanding strength, fatigue-resistance, and oxidation resistance for service temperatures as high as 1400°F (760°C). It is ideally suited to use in seal rings, containment rings, duct segments, casings, fasteners, rocket nozzles, pumps, and many other components. 242® alloy has tensile and creep strength properties up to 1300°F (705°C). These properties are as much as double those of solid solution-strengthened alloys and are comparable to those of some precipitation-hardened super alloys.
242® alloy has excellent tensile ductility over the entire temperature range and superior, low-cycle fatigue strength. It is also readily formed and welded by conventional techniques. Although 242® alloy contains only 8% chromium, its oxidation resistance is sufficient to allow its use in an uncoated condition at temperatures as high as 1500°F (815°C). This attribute gives this alloy a real advantage over other low-expansion alloys.
Oxidation Resistance - Excellent to 1400°F (760°C)
Gaseous Fluorine & HF - Excellent to 1650°F (900°C)
Molten Chloride/Fluoride Salts - Excellent to 1650°F (900°C)
Chloride Stress Cracking Resistance - Excellent
Chlorination - Excellent in Reducing Environments
Hydrogen Embrittlement Resistance - Fair to Good