No that I know, Rick. I'm pretty sure that Demeyere would never give a lifetime guarantee on the non-clad ones or even a 5 year guarantee on the non-stick ones if that problem could occur. Those pans are also surprisingly heavy compared to one layer products equipped with a heavy bottom plate. It always surprises me how they mange to fabricate such a dead flat bottom, knowing that the whole construction is probably made of the same sandwiched material. I wonder how they do that?