... -Cobalt, controlled expansion alloy containing 29% Nickel. It's coefficient of expansion we produce the products with Incoloy 800H, Incoloy 825 ... , Invar, Kovar, alloy.Available forms are seamless pipe, welded pipe, seamless tube, welded tube, bar, wire, sheet, plate, forgings, pipe fittings and flanges,strip. pipe fittings