Nickel and High Nickel Alloys
The family of nickel alloys offer some remarkable combinations of performance capabilities.
Mechanically they have good strength properties, exceptional toughness and ductility, and are generally immune to stress corrosion. Their corrosion resistance properties and performance characteristics in both elevated and subzero temperatures is superior. Unfortunately, nickel based alloys are relatively expensive. The two most popular nickel alloys used in fastening are the nickel-copper and nickel-copper-aluminum types. Nickel-Copper alloy, known commercially as by such trade names as Monel. Monel 400 is the
most commonly used nickel-copper alloy for cold forming; contains excellent corrosion in heat and salt
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water. Nickel-Copper-Aluminum alloy, commercially tradenamed K-Monel, is an extension of a nickel- copper alloy. The aluminum and titanium elements improve the response heat treatment and significantly enhance the mechanical strength.
Inconel & Hastelloy: These are considered outstanding materials for applications where fastenings must contain high strength and resistance to oxidation in extreme environments such as elevated temperatures
and various acidic environments. There are several grades of Inconel and Hastelloy, most are proprietary, and practically all are trade named, each with their own strength and corrosion characteristics.
Aluminum
