Comparative Burner Rig Oxidation Resistance, 1000 Hours
Burner rig oxidation tests were conducted by exposing samples 3/8 in. x 2.5 in. x thickness (9 mm x 64 mm x thickness), in a rotating holder, to products of combustion of a mixture of No. 1 and No. 2 fuel oil. This was burned at a ratio of air to fuel of about 50:1 for 1000 hours. (Gas velocity was about 0.3 mach). Samples were automatically removed from the gas stream every 30 minutes, fan-cooled to near ambient temperature, and then reinserted into the flame tunnel.
Alloy |
1800°F (982°C)
|
Metal Loss |
Average Metal Affected
|
Maximum Metal Affected
|
- |
mils
|
µm
|
mils
|
µm
|
mils
|
µm
|
230® |
0.8 |
20 |
2.8 |
71 |
3.5 |
89 |
X |
2.7 |
69 |
5.6 |
142 |
6.4 |
153 |
625 |
4.9 |
124 |
7.1 |
180 |
7.6 |
193 |
25 |
6.2 |
157 |
8.3 |
211 |
8.7 |
221 |
MULTIMET® |
11.8 |
300 |
14.4 |
366 |
14.8 |
376 |
800H® |
12.7 |
312 |
14.5 |
368 |
15.3 |
389 |
Oxidation Resistance in Flowing Air (1008 Hours)
The following are static oxidation test rankings for 1008-hour exposures in flowing air. The samples were cycled to room temperature weekly. Average metal affected is the sum of metal loss plus average internal penetration.
Alloy |
1600°F (871°C) |
1800°F (982°C) |
Metal Loss
|
Avg. Met. Aff.
mils, (mm) |
Metal Loss
|
Avg. Met. Aff.
mils, (mm) |
mils |
μm |
mils |
μm |
mils |
μm |
mils |
μm |
214® |
0 |
0 |
0.1 |
3 |
0.1 |
3 |
0.3 |
8 |
188 |
- |
- |
- |
- |
0.1 |
3 |
1.1 |
28 |
230® |
0 |
0 |
0.6 |
15 |
0.2 |
5 |
1.5 |
38 |
X |
0.1 |
3 |
0.7 |
18 |
0.2 |
5 |
1.5 |
38 |
625 |
0.1 |
3 |
0.6 |
15 |
0.4 |
10 |
1.9 |
48 |
617 |
- |
- |
- |
- |
0.3 |
8 |
2.0 |
51 |
25 |
- |
- |
- |
- |
0.3 |
8 |
2.0 |
51 |
HR‐120® |
0.1 |
3 |
0.9 |
23 |
0.4 |
10 |
2.1 |
53 |
556® |
- |
- |
- |
- |
0.4 |
10 |
2.3 |
58 |
800HT |
0.1 |
3 |
1.0 |
25 |
0.5 |
13 |
4.1 |
104 |
HR‐160® |
0.2 |
5 |
3.0 |
79 |
0.7 |
18 |
5.5 |
140 |
(Cycled weekly); alloys are arranged in ascending order by the average metal affected.