Coating Material

Friction coefficient

Low-carbon steel

0.58

In625 20 °C

0.76

In625 1000 °C

0.54

In625-Cr₂O₃-Ag 20 °C

0.35

In625-Cr₂O₃-Ag 1000 °C

0.25

Tungsten Carbide 5 N

0.87

Tungsten Carbide 10 N

0.84

CoNiCrAlY bond coat and Chromium Oxide top coat

0.39