ECoCr-B X 1/8in X 14in X 5 lb pack (Coated Electrode, 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"