There are a great variety of commercial nickel alloys mainly because nickel is able to dissolve a large amount of alloying elements while maintaining a single ductile austenitic phase. Nickel alloys are generally designed for and used in highly aggressive environments, for example, those where stainless steels may experience pitting corrosion or environmentally assisted cracking. While nickel Nickel, chemical element, ferromagnetic metal of Group 10 (VIIIb) of the periodic table, markedly resistant to oxidation and corrosion. Silvery white, tough, and harder than iron, nickel is widely familiar because of its use in coinage but is more important as the pure metal or in the form of alloys. A coil made out of a nickel-titanium alloy, an SMA. If you search “nitinol” on various ecommerce sites, it is not hard to find SMA wires and other types of memory materials available for purchase. The Accidental Discovery of Shape Memory Alloys. The discovery of the unique behavior of SMAs is a story in itself. Melting point of ferritic stainless steel – Grade 430 steel is around 1450°C. Melting point of martensitic stainless steel – Grade 440C steel is around 1450°C. Melting point of Ti-6Al-4V – Grade 5 titanium alloy is around 1660°C. In general, melting is a phase change of a substance from the solid to the liquid phase. .

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