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HAYNES® Alloys

Oxidation Resistance

HAYNES® 244® alloy exhibits very good oxidation resistance at temperatures up to 1400°F (760°C), and should not require protective coatings for continuous or intermittent service at these temperatures. The alloy is not specifically designed for use at higher temperatures, but can tolerate short-term exposures.

Static Oxidation

Alloy 1400°F (760°C)
Metal Loss Avg. Met. Aff.
mils μm mils μm
625 0 0 0 0
244® 0 0 0.2 5
242® 0.1 3 0.3 8
R-41 0.1 3 0.4 10
282® 0.1 3 0.4 10
Waspaloy 0.1 3 0.6 15

Comparative Cyclic Oxidation Resistance

Alloy 1400°F (760°C), 1000 h, Cycled 1x/10 h 1400°F (760°C), 1000 h, Cycled 1x/1h
Metal Loss Average Metal
Affected
Metal Loss Average Metal Affected
mils µm mils µm mils µm mils µm
244® < 0.1 0.6 0.1 1.9 < 0.1 0.5 0.1 3
242® < 0.1 0.7 0.1 1.9 < 0.1 0.5 0.1 3
282® 0.1 1.5 0.4 10 0.1 1.5 0.4 10
Waspaloy 0.1 2.2 0.6 15 0.1 2.2 0.6 15

Amount of metal affected for alloys exposed to flowing air for 1000-h at 1400°F. Cycled as noted.

HR-235 Oxidation schematic
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