| |
Oxidation in Air |
Laboratory tests were conducted in flowing air at 1800 to 2200°F (982 to 1204°C) for 1008 hours, with
specimens cycled to room temperature once every 168 hours. |
|
1800°F (982°C) |
2000 °F (1093°C) |
|
|
Metal Loss, |
Average Metal |
Metal Loss |
Average Metal |
| Alloy |
Mils* |
Affected, Mils* |
Mils* |
Affected, Mils* |
|
| HR-160® alloy |
0.6 |
5.9 |
1.7 |
10.3 |
| 800HT® alloy |
0.0 |
3.9 |
6.1 |
12.0 |
| 253 MA alloy |
1.3 |
2.9 |
0.7 |
8.2 |
| RA85H alloy |
0.5 |
8.2 |
2.9 |
25.9 |
|
| |
|
|
|
|
| |
|
|
|
|
|
2100°F (1149°C) |
2200°F (1204°C) |
|
|
Metal Loss, |
Average Metal |
Metal Loss |
Average Metal |
| Alloy |
Mils* |
Affected, Mils* |
Mils* |
Affected, Mils* |
|
| HR-160® alloy |
2.7 |
13.0 |
4.1 |
24.2 |
| 800HT® alloy |
12.3 |
18.8 |
19.4 |
>58* |
| 253 MA alloy |
8.4 |
16.4 |
18.6 |
29.2 |
| RA85H alloy |
3.7 |
>59** |
3.9 |
>59** |
|
* To convert mils to mm, divide by 40
** Internal oxidation through thickness |
|
Long-Term Oxidation in Air |
Laboratory tests were conducted at 2000°F (1093°C) in still air (box furnace), with specimens being
cycled to room temperature once every 30 days. |
|
|
Weight Loss (mg/cm2) |
|
|
|
30 |
90 |
150 |
210 |
300 |
360 |
Metal Loss* |
Average Metal* |
| Alloy |
days |
days |
days |
days |
days |
days |
Mils |
Affected, Mils |
|
|
| HR-160® alloy |
10.4 |
23.2 |
34.6 |
46.8 |
60.1 |
73.1 |
3.6 |
29.0 |
| alloy 601 |
4.6 |
15.8 |
28.2 |
46.1 |
82.0 |
110.5 |
5.4 |
45.1 |
| 800HT® alloy |
4.6 |
203.3 |
379.7 |
529.2 |
746.7 |
893.9 |
44.3 |
51.0 |
| RA85H alloy |
6.3 |
46.5 |
103.8 |
144.9 |
210.5 |
348.1 |
17.9 |
80.3 |
|
|
| *360 days |
|
|
