Comparative Static Oxidation Data in Flowing Air for 1008 Hours* |
|
1800°F (980°C) |
2000°F (1095°C) |
|
Metal Loss/side |
Metal Loss + CIP**/side |
Metal Loss/side |
Metal Loss + CIP**/side |
Alloy |
Mils |
μm |
Mils |
μm |
Mils |
μm |
Mils |
μm |
|
| HASTELLOY® X alloy |
0.29 |
0.007 |
0.74 |
0.019 |
1.5 |
0.038 |
2.7 |
0.069 |
| INCONEL® alloy 600 |
0.32 |
0.008 |
0.90 |
0.023 |
1.1 |
0.028 |
1.6 |
0.041 |
| INCONEL alloy 601 |
0.53 |
0.013 |
1.3 |
0.033 |
1.2 |
0.031 |
2.6 |
0.06 |
| Alloy 625 |
0.32 |
0.008 |
0.72 |
0.018 |
3.3 |
0.083 |
4.8 |
0.12 |
| Alloy 800H |
0.94 |
0.024 |
1.8 |
0.046 |
5.4 |
0.137 |
7.4 |
0.19 |
|
* Cycled to room temperature once a week
** CIP = Continuous Internal Penetration
INCONEL is a trademark of Inco Family of Companies |
|
Schematic Representation of Metallographic Technique used for Evaluating Oxidation Tests |
 |
1. Metal Loss = (A-B)/2
2. Average Internal Penetration = C
3. Maximum Internal Penetration = D
4. Average Metal Affected = ((A-B)/2) + C
5. Maximum Metal Affected = ((A-B)/2) + D |
|
Comparative Average Hot Corrosion Resistance* |
|
|
|
Total Metal Affected/side, Mils (mm) |
Test
Temperature |
Test
Period, |
HASTELLOY®
X alloy |
HASTELLOY
S alloy |
HASTELLOY
188 alloy |
°F |
°C |
Hours |
Mils |
mm |
Mils |
mm |
Mils |
mm |
|
1650 |
900 |
200 |
3.0 |
0.8 |
2.7 |
0.07 |
2.1 |
0.05 |
1650 |
900 |
1000 |
6.8 |
0.17 |
7.5 |
0.19 |
3.7 |
0.09 |
|
| * All tests performed by exposure to the combustion products of No. 2 fuel oil (0.4 percent sulfur) and 5 ppm of sea salt. Gas velocity over samples was 13 ft./sec. (4 m/s). Thermal shock frequency was one/hour. |
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