WEXCO® 555   

Cobolt-nickel base alloy with high chromium and boron content for excellent corrosion resistance against hydrochloric and other acids.  Dual-phase microstructure with complex borides provide excellent wear resistance - over 10 times the service life of nitrided barrels in corrosive atmospheres!  Typical hardness range of Rockwell C50-55.  Recommended for use where severe corrosive conditions are encountered.