... -cobalt alloy available in plate,sheet,rod,bar,wire,tube,pipe,etc. super invar rodSuper Invar is an iron-nickel-cobalt alloy that exhibits ... approximately one half of the thermal expansion of Invar 36 alloy ... . 0.020.350.20325.5Balanceavailable in plate,sheet,rod,bar,wire,tube,pipe,etc. super invar rod