Alloy

Colmonoy 42

Alloy Type

Nickel with Chromium Carbide

Nominal Composition (%)

C 0.20
Si 2.80
Cr 4.00

 Fe 0.30
B 1.20
Mo 3.00
Ni Balance

Rockwell Hardness
(C-scale)

35-40

Density (gm/cc)

8.50

Fusing Temperature (approx.)

1800°F
980°C

Resistance:

to
Abrasion

to

Corrosion

to
Impact

to
Galling

 

4

2

2

3

Supplied Forms

Atomized powder

Method of application

Spraywelder (42SA),

HVOF (43HV),

5P (42M)

Description and General Uses

 

Better ductility and toughness than Colmonoy No. 52. Less hardness and slightly less abrasion resistance. Finished by carbide tools and grinding.