Form This specification covers a corrosion and heat-resistant nickel alloy in the form of sheet and strip 0.010 to 0.250 inch (0.25 to 6.25 mm) inclusive in thickness (see 8.5). Application These products have been used typically for parts requiring high strength up to 1500 ??(816 ?? and oxidation resistance up to 1800 ??(982 ??@ but usage is not limited to such applications. Parts may be formed and then heat treated to improve strength at elevated temperatures.