Stock Material: Agglomerated and sintered powder
Nominal composition:
Cr3C2: base
Total carbon: 9.2-10.8% wt.
Nickel: 18-22% wt.
Chrome: 4.5-5.5% wt. (in metal phase)
Coating Properties
apparent metallographic porosity: <1.0%
bond strength to carbon steel (@0.020" thick.): 10,000 PSI
hardness: 750-850 HV300
typical as-sprayed roughness Ra: 80-120 μin
achievable roughness after finishing Ra: 0.50 μin
maximal coating thickness: 0.040 in
maximal working temperature: 1,380 °F
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Coating Characterization
The coating has excellent resistance to elevated temperature
erosion and sliding wear. Impact resistance and fatigue resistance
are good. Thermal shock resistance is excellent. General corrosion
and elevated temperature corrosion resistance are very good. It is
used at elevated temperatures where tungsten carbide materials do
not work, or when faster and cheaper finishing is necessary.
Typical Applications
Sliding wear, erosion and fretting at elevated temperatures
(waterwall and superheater tubing in fluidized-bed and pulverized-coal
power generation boilers, impellers, nozzles, blades of gas turbines,
ball valves and seats, piston rings), wear protection in hydraulic
equipment as a hard chrome alternative.
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