is suitable for the manufacture of induction heating cookware by normal procedures the material will usually be cut into blanks pressed into molds and drawn into whatever shape is desired when desired the material described above is further bonded to other layers to achieve a seven layer material for making induction heating cookware in this case the material will not be fully reduced in thickness since it will be further pinched as explained below a thickness of up to 0 0165 inches is suitable the material described above is brought into contact with a layer of aluminum triple ply material consisting of a core of aluminum alloy surrounded on both sides by essentially pure aluminum such aluminum triple ply is commercially available or can be assembled in house the aluminum alloy is preferably alloy 3003 or 3004 and the pure aluminum is of 99 0 99 75 purity the total thickness of aluminum triple ply to be employed is from about 0 020 0 200 inches a final layer of austenitic stainless steel of a thickness of between about 0 010 and 0 017 inches is placed on the aluminum triple ply and the entire assemblage is passed into a furnace and then into a pinch mill to take a small reduction followed by a harder pinch to effect a further reduction the bonded material is then annealed to increase the bond strength it will be apparent to those skilled in the art that this material is assembled so that only a layer.