As I promised in the last post that I want to post about Nickel and Nickel Alloys in this Piping & Fabrication blog and here it is. Nickel is a tough, malleable metal that offers good resistance to oxidation and corrosion. When nickel is combined with copper as the secondary element, the well-known series of Monel alloys are created. Nickel,Monel, and various modifications of these materials are used in piping systems, turbine blading, valves, and miscellaneous power plant accessories handling steam.
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| TABLE A3.9 Nickel and Nickel-Based Pipe and Tubing Alloy Specifications |
The presence of even a small amount of sulfur in a reducing environment will result in embrittlement as temperatures of 700–1200°F (370–650°C).
By addition of Cr, Co, Mo, Ti, Al, or Nb, the high temperature strength and creep resistance of the nickel-base materials can be substantially increased. However, these alloys possess low ductility values and require special care in forming of these materials, even at elevated temperatures. Table A3.9 lists a number of ASME specifications for nickel-based alloy piping and tubing.
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