A method of operating a twin wheel conform metal extrusion device or a cladding extrusion device for producing a composite of an extruded metal shell bonded to a metal foam core. A metal feedstock is extruded through an extrusion die defining a cavity housing a hollow extrusion mandrel to produce a metal shell. Liquid foam of a second metal is simultaneously delivered through the hollow mandrel bore such that the foam exiting the axial bore is metallurgically bonded to the metal extruded through the cavity.
