This course outlines the key characteristics, performance attributes, and selection principles for corrosion- and heat-resistant nickel alloys used in chemical processing environments. It explains the metallurgical basis for their strength, corrosion resistance, and thermal stability, and compares the behavior of major alloy families—including Ni-Cu, Ni-Cr, Ni-Cr-Mo, and Ni-Mo grades—across a range of aggressive aqueous and high-temperature conditions. Guidance is provided on alloy identification, mechanical properties, corrosion mechanisms, welding practices, and typical industrial applications, helping engineers evaluate suitable materials for demanding service environments.