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HAYNES® Alloys

Thermal Stability

HAYNES® 242® alloy has excellent retained ductility and impact strength after long-term thermal exposure at temperature. Combined with its high strength and low thermal expansion characteristics, this makes for very good containment properties in gas turbine static structures. The graphs below show the retained room-temperature tensile elongation and impact strength for 242® alloy versus other relevent materials after a 4000 hour exposure at 1200°F (650°C).

Comparative Retained Ductility and Impact Strength

Room-Temperature Tensile Elongation
242 Room temperature tensile

Room Temperature Impact Strength
242 Room temperature impact strength

Room-Temperature Properties after Exposure at 1200°F (649°C)*

Exposure
Time
0.2% Offset
Yield Strength
Ultimate
Tensile Strength
Elongation Reduction
of Area
Charpy
V-Notch Strength
h ksi MPa ksi MPa % % ft.-lbs. J
0 110 758 179 1234 39 44 66 89
1000 119 820 194 1338 28 38 41 56
4000 122 841 196 1351 25 37 31 42
8000 121 834 193 1331 24 39 26 35

*Samples age hardened 1200°F (649°C) 24 h.
Duplicate tests.

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