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.
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.