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HAYNES® Alloys

Oxidation Resistance

Comparative Static Oxidation Data in Flowing Air for 1008 Hours*

Alloy 1800°F (980°C) 2000°F (1095°C)
Metal Loss/Side Metal Loss + CIP**/Side Metal Loss/Side Metal Loss + CIP**/Side
- mils mm mils mm mils mm mils mm
X 0.29 0.007 0.74 0.019 1.5 0.038 2.7 0.069
INCONEL® 600 0.32 0.008 0.90 0.023 1.1 0.028 1.6 0.041
INCONEL® 601 0.53 0.013 1.3 0.033 1.2 0.031 2.6 0.06
625 0.32 0.008 0.72 0.018 3.3 0.083 4.8 0.12
800H® 0.024 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
Elevating Oxidation Tests

HastelloyX Oxidstion

Comparative Average Hot Corrosion Resistance*

Test
Temperature
Test
Period
Total Metal Affected/Side
X S 188
°F °C h mils mm mils mm mils mm
1650 900 200 3.0 0.08 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. (4m/s). Thermal shock frequency was one/hour.
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