Stellite™ 1 Alloy

Nominal Composition (Mass %) and Physical Properties

Co Cr W C Others Hardness Density Melting Range
Base 28-32 11-13 2.0-3.0 Ni, Fe, Si, Mn, Mo 50-58 HRC
550-720 HV
8.69 g/cm3
0.314 lb/in3
1248-1290ºC
2278-2355ºF

Stellite 1

Stellite cobalt-based alloys consist of complex carbides in an alloy matrix. They are resistant to wear, galling, and corrosion and retain these properties at high temperatures. Their exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix.

Stellite 1 possesses excellent abrasion and corrosion resistance for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws, and bearing sleeves. It retains its hardness at temperatures in excess of 760°C (1400°F). 

Stellite 1 contains a high proportion of hard, wear-resistant primary carbides. These render the alloy well suited to applications involving extreme low-angle erosion and severe abrasion, with some sacrifice in toughness. Compared to other Stellite alloys, it is more crack-sensitive, and care should be taken to minimize the cooling stresses experienced during casting and hardfacing processes. Due to its high hardness and wear resistance, Stellite 1 should only be finished by grinding. 

Optical Micrograph of a Stellite 1 Weld Overlay

Stellite 1 can be supplied to the following specifications:

SPECIFICATION PRODUCT FORM
UNS R30001  Rod, castings, powder for PTA or laser processing 
UNS W73031  Wire
UNS W73001  Electrode
SPECIFICATION PRODUCT FORM
AWS A5.21 / 
ASME BPVC IIC SFA 5.21 ERCoCr-C 
Rod
AWS A5.21 /
ASME BPVC IIC SFA 5.21 ERCCoCr-C 
Wire
AWS A5.13 /
ASME BPVC IIC SFA 5.13 ECoCr-C 
Electrode

 

Stellite 1 Alloy Data Sheet

Check out our Stellite 1 Alloy data sheet for additional information.

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