Hardfacing Alloy
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Hardfacing Alloy >> Co 1
Co 1, is a cobalt based bare rod that has the highest hardness and wear resistance of the standard cobalt alloys. Co 1 is used in elevated temperature, high wear applications. It is difficult to machine requiring carbide tools or grinding. It can be applied to all weldable steels, including stainless steels. It equivalent to: Stellite 1, Polystel 1.

Hydro pulper disc;
Oil drilling tools;
Mixer seals and rotors.

Product details
Chemical composition:

Chemical composition£¨%£©
Cr Mo Fe Ni Mn
Co 1 31.0 ¡Ü1.0 ¡Ü3.0 ¡Ü3.0


Si C W Co  


2.4 12.2 Bal

Physical Properties:
Grade Density Melting Point
Co 1 8.69g/cm3 1190~1345¡ãC

Typical Characteristics:

Hardness Abrasion Resistance Magnetic Corrosion Resistance Machilityineab

HRC 50~58

Excellent No Good Diffcult

Standard Sizes:

Diameter Diameter Diameter
1/8¡± (3.2mm) 5/32¡± (4.0mm) 3/16¡± (4.8mm)
Note that special sizes, or packing requirements are available on all requests.
AWS 5.21-2001 ERCoCr-C , Mil-R-17131C Mil-CoCr-C.
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