ECoCr-B (Cobalt 12)

Cobalt Alloy 12 (ECoCr-B) could be
considered an in termediate alloy between
Cobalt Alloy 6 and Cobalt Alloy 1. It contains
a higher fraction of hard, brittle carbides than
Cobalt Alloy 6, and has increased resistance
to low-angle erosion, abrasion, and severe
sliding wear while retaining reason able
impact and cavitation resistance. Cobalt
Alloy 12 is often used self-mated or running
against Cobalt Alloy 6 or 1. The higher
tungsten content provides better hightemperature
properties compared to Cobalt
Alloy 6, and it can be used at temperatures
up to about 700°C. Cobalt Alloy 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 fibers;
and saw tips in the timber industry. It is also
used for control plates in the beverage
industry, pump vanes, bearing bushes and
narrow-neck glass mold plungers; and for
hardfacing of engine valves, pinch rollers
in the metal-processing indus tries, and
rotor blade edges.

AWS Specification
AWS A5.13/A5.13M:2010
AWS Classification ECoCr-B

Typical Chemistry
C 1.0 - 1.7
Mn 2.0
Si 2.0
Cr 25 - 32
Ni 3.0
Mo 1.0
Fe 5.0
W 7.0 - 9.5
Co REM
OTHER 1.0

Typical Properties
Yield Strength, ksi 84
Tensile Strength, ksi 107
Elongation%, min <1
Hardness 45-51 HRC
Density 0.308 lbs/cu. in.
Melting Range 2192 - 2489ºF

Available Diameters
3/32", 1/8", 5/32", 3/16" & 1/4"