Home Resource Center Product Data and Related Literature Clad Metals eStainlessResources eStainless Steel Resources eStainless steels are thermally conductive, fully formable clad laminates of stainless steel and copper (SUS/Cu/SUS). The materials are ideal as high conductivity replacements for stainless steels, allowing heat spreading to be designed directly into the structure of devices. Resources eStainless® Clad Data Sheet eStainless Clad - Structural heat spreader materials for lighter, cooler and thinner electronics. eStainless Steel Product Brief eStainless® steels from Materion are a stainless steel alternative for thermal management in consumer electronics. They combine the structural performance of steel with the conductivity of copper or aluminum to enable effective heat spreading without adding volume to a device.