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HAYNES® Alloys

Carburization Resistance

Laboratory pack carburization testing in graphite at 1800°F (982°C) for 500 hours

Alloy Carbon Absorption Total Depth Of Attack
(mg/cm2) mils mm
HR-120® 0.0 0 -
556® 0.0 0 -
HR 160® 0.3 0 -
800HT 0.3 0.9 0.02
601 1.0 0.46 18.0
RA330 1.9 1.79 70.6
310SS 7.7 2.14 84.2
253 MA 11.6 2.34 92.1

Exposure to Carbon Bed at 1650°F (899°C)

HR160 field tests

Ar-5%H-1%CH (Vol.%) 1800ºF (982ºC) for 55 hours

Alloy  Carbon Absorption (mg/cm)
HR-160®  2.9 
601 3.2 
 800H 3.6 
600  7.3 
HR-120® 7.9 
556® 7.9 
RA330  9.2 
253 MA 9.4
310 SS 10.0 
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