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HAYNES® Alloys

Oxidation Resistance

Comparative Static Oxidation Resistance 1008 Hour Static Oxidization in Flowing Air*

Test
Temperature
Alloy Metal Loss Metal Loss and
Internal Penetration
Linearly Extrapolated
Rate of Attack
°F °C - mils mm mils mm mils mm
1800 982 214® 0.07 0.002 0.20 0.005 1.7 0.043
S 0.18 0.005 0.49 0.012 4.3 0.109
188 0.18 0.005 0.58 0.015 5.0 0.127
230® 0.25 0.006 0.71 0.018 6.2 0.158
625 0.32 0.008 0.72 0.018 6.3 0.160
600 0.32 0.008 0.90 0.023 7.8 0.198
X 0.34 0.009 0.94 0.024 8.2 0.208
556® 0.39 0.010 1.05 0.027 9.1 0.218
310 SS 0.35 0.009 1.13 0.029 9.8 0.249
800H 0.94 0.024 1.79 0.045 15.6 0.396
2000 1093 214® 0.08 0.002 0.08 0.002 0.7 0.018
230® 0.45 0.011 1.27 0.032 11.0 0.279
S 0.44 0.011 1.29 0.033 11.2 0.285
310 SS 0.97 0.023 1.30 0.033 11.3 0.287
188 0.43 0.010 1.33 0.033 11.6 0.290
600 1.10 0.027 1.63 0.041 14.1 0.358
556® 0.97 0.027 2.57 0.065 22.3 0.566
X 1.49 0.038 2.72 0.069 23.6 0.599
625 3.27 0.083 4.80 0.122 41.7 1.059
800H 5.39 0.137 7.39 0.188 64.2 1.631
2100 1149 214® 0.15 0.004 0.31 0.008 2.7 0.069
S 1.01 0.026 1.66 0.042 14.4 0.366
600 1.73 0.044 2.86 0.073 24.9 0.633
230® 2.29 0.058 3.44 0.087 29.9 0.760
310 SS 2.97 0.075 4.44 0.113 38.6 0.980
X 4.50 0.114 5.83 0.148 50.6 1.285
188 7.23 0.184 8.03 0.204 69.8 1.773
800H 7.52 0.191 8.86 0.225 77.0 1.956
556® 9.31 0.237 11.64 0.296 101.2 2.571
625 15.96 0.405 18.20 0.462 158.2 4.018
*Cycled to room temperature once a week

Schematic of Metallographic Technique Used for
Dynamic Oxidation and Hot Corrosion Evaluations

Alloy S

Average Dynamic Oxidation Resistance*

Test Temperature Test
Period
Metal
Loss/Slide
Maximum
Penetration Side
Total Metal
Affected/Side
°F °C h mils mm mils mm mils mm
1600 871 100 1.0 0.03 0.3 0.01 1.3 0.03
1800 982 100 1.4 0.04 0.7 0.02 2.2 0.06
2000 1093 100 1.6 0.04 2.2 0.06 3.8 0.10
*Samples exposed to the combustion products of No. 2 fuel oil (0.4 percent sulfur). Hot gas velocity was 280ft./sec. (85mm/sec). Thermal shock frequency was 2 cycles per hour, consisting of cooling from test temperature to <500ºF (<260ºC) and back to test temperature in two minutes.

Comparative Average Dynamic Oxidation Resistance

Test Temperature Test Period Maximum Metal Affected/Side
S 230® X 25
°F °C h mils mm mils mm mils mm mils mm
1800 982 1000 6.6 0.17 3.5 0.09 6.4 0.16 7.6 0.19
2000 1093 500 15.2 0.39 5.7 0.14 13.5 0.34 <31.0*** 0.79***

*Samples exposed to the combustion products of No. 2 fuel oil (0.4 percent sulfur). Hot gas velocity was 280ft./sec. (85mm/sec). Thermal shock frequency was 2 cycles per hour, consisting of cooling from test temperature to <500ºF (<260ºC) and back to test temperature in two minutes. 
**Metal loss plus maximum internal penetration 
***Sample was consumed

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