Alloy

Colmonoy 72

Alloy Type

Nickel with Chromium Carbide

Nominal Composition (%)

C 0.50
Si 3.00
Cr 12.00
Fe 4.00

 B 3.20
W 13.00
Ni Balance

Rockwell Hardness
(C-scale)

57-62

Density (gm/cc)

9.51

Fusing Temperature (approx.)

1940°F
1060°C

Resistance:

to
Abrasion

to

Corrosion

to
Impact

to
Galling

 

1

1

4

1

Supplied Forms

Atomized Powder, Bare Rods, Ingot

Method of application

Spraywelder, Fusewelder, Oxyacetylene, GTAW 

Description and General Uses

 

Tungsten content strengthens the nickel matrix, giving this alloy excellent resistance to low-stress abrasion and scouring action.  Wear resistance often superior to Colmonoy No. 6 For pump parts. Finished by grinding.