Form This specification covers a corrosion and heat-resistant nickel alloy in the form of bars@ wire@ forgings@ flash welded rings@ and extrusions 4 inches (102 mm) and under in nominal diameter or least distance between parallel sides@ and stock for forging or flash welded rings. Application These products have been used typically for parts requiring both corrosion and oxidation resistance up to 1@000 ??(538 ??@ and where such parts may require welding during fabrication and are then precipitation heat treated to develop required properties@ but usage is not limited to such applications.