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Carburization Resistance

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HR-224%20Carburization%20Figure%202000F

Laboratory Carburization Testing in Ar-5%H2-2%C3H6 at 1600°F (871°C) for 124 hours

Alloy Carbon Absorption Total Depth of Attack
(mg/cm2) mil mm
214® 0.4 0 0
HR-160® 0.9 10.3 0.26
HR-224® 1.4 5.8 0.15
625 2.6 10 0.25
X 3.6 11.2 0.28
HR-120® 4 14.3 0.36

Note: Preliminary data from a single test.

Laboratory Carburization Testing in Ar-5%H2-2%C3H6 at 2000°F (1093°C) for 24 hours

Alloy Carbon Absorption Total Depth of Attack
(mg/cm2) mil mm
214® 0.2 0 0
HR-224® 3.7 35.7 0.9
HR-160® 7.1 45.6 1.2
625 8.9 > 61.3 > 1.6
X 11.7 41.9 1.1
HR-120® 13.6 > 61.9 > 1.6

Note: Preliminary data from a single test. 625 and HR-120® exhibited through-thickness carburization attack.

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