A Prominent Ni-Cr-Si-Cu Alloy Resisting in Metal Dusting

Metal dusting, catastrophic corrosion, has occurred for metal components at between 450 and 800 deg-C in carbonaceous environments. Thus, an excellent alloy in resting metal dusting is urgently demanded in a chemical industry, such as ammonia, methanol, and gas to liquids plants. We have studied metal dusting mechanism and developed new Nickel-base alloy which is superior to conventional alloys such as Alloy 690 and Alloy 601. The developed alloy basically consists of 30Cr-60Ni and has several content of Si and Cu. In this presentation, metal dusting behavior of the developed alloy will be demonstrated. Mechanical properties, high temperature strength, creep strength, and phase stability after ageing, will also be presented.