Stellite™ 12 Alloy

Nominal Composition (Mass %) and Physical Properties

Co Cr W C Others Hardness Density Melting Range
Base 27-32 7.5-9.5 1.4-2.0 Ni, Fe, Si, Mn 45-51 HRC
435-590 HV
8.53 g/cm3
0.308 lb/in3

Stellite 12

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 12 could be considered an intermediate alloy between Stellite 6 and Stellite 1. It contains a higher fraction of hard, brittle carbides than Stellite 6, and has increased resistance to low-angle erosion, abrasion, and severe sliding wear whilst retaining reasonable impact and cavitation resistance. Stellite 12 is often used self-mated or running against Stellite 6 or Stellite 1. The higher tungsten content provides better high-temperature properties compared to Stellite 6, and it can be used at temperatures up to about 700 ̊C.

Stellite 12 is typically used for cutting tools that need to withstand abrasion, heat, and corrosion. Examples include industrial knives for cutting carpets, plastics, paper and synthetic fibres; and saw tips in the timber industry. It is also used for control plates in the beverage industry, pump vanes, bearing bushes and narrowneck glass mold plungers; and for hardfacing of engine valves, pinch rollers in the metal-processing industries and rotor blade edges. 


Optical Micrograph of a Stellite 12 PTA Deposit at 500X

Stellite 12 can be supplied to the following specifications:

UNS R30012 Rod, Castings
UNS W73012 Electrode
UNS W73042  Wire
AWS A5.21 / ASME BPVC IIC SF A 5.21 ERCoCr-B  Rod
AWS A5.21 / ASME BPVC IIC SF A 5.21 ERCCoCr-B  Wire
AWS A5.13 / ASME BPVC IIC SF A 5.13 ECoCr-B  Electrode


Stellite 12 Alloy Data Sheet

Check out our Stellite 12 Alloy data sheet for additional information.

View Now
You are about to add to your My Solutions page. Do you want to proceed?
Please adjust the following properties from

ISO Catalog Number

ANSI Catalog Number

to find similar products.


You should be logged to see your dashboard information
Session expired due to inactivity, please login again
The product/s () you were trying to add to the cart is/are not available, please contact customer service
item(s) successfully added to the cart
View Cart

. Please enter the desired qty for the material(s) you want to include in your promotion or Proceed Without Promotion and only your base materials will be added to the cart.

Minimum quantity should be

SAP Material Number ISO Catalog Number Grade    

Thank you for your registration, pending approval & completion of the registration, your access is currently limited. Full utilization of product search capabilities & collaboration space is available and will remain. Please allow 2 business days for registration completion.

Thank you for your successful registration. You now have immediate access to log in and utilize the site.

You are about to leave the Solution building process.

Are you sure you want to leave?