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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 Room Temperature Impact Strength
Comparative Retained Ductility and Impact Strength

*Alloy 909 data for 1000 hours.

Room-Temperature Properties after Exposure at 1200°F (650°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
0 110 760 179 1235 39 44 66 90
1000 119 820 194 1340 28 38 41 56
4000 122 840 196 1350 25 37 31 42
8000 121 835 193 1330 24 39 26 35

*Samples machined from plate after exposure.
Duplicate tests.

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