Alloys designed to resist high temperature corrosion have existed since the beginning of the 20 th century. Carbon steel, a workhorse of many industries, loses its usefulness above 538°C (1000°F) both due to strength degradation and corrosion. Alloy steels with chromium and molybdenum additions have expanded the useful temperature range of high temperature applications. However, with the increasing severity of high temperature environments encountered in modern day industries, there has been a singular lack of alloys, which can provide a combination of properties such as good mechanical strength and high temperature corrosion resistance to various modes of degradation (oxidation, carburization, metal dusting, etc.) up to 1200°C. This paper describes the development of one such nickel base alloy - alloy 602CA (UNS N06025) which has provided an unique combination of properties by optimization of various alloying elements. This alloy since its introduction to the market in tile early 1990's, has found numerous applications in the heat treat industry, annealing furnaces, furnace rolls, furnace belts, direct reduction of iron-ore technology to produce sponge-iron, calciners to produce very high purity alumina, calciners for chrome-iron ore for producing ferro-chrome, calciners to reclaim spent nickel catalysts, catalytic converters and glow plugs in the automotive industry, refineries, petrochemical industries, nuclear waste vitrification processes and many others. A brief description of some of these applications is presented in this paper. Keywords: Alloy 602CA, UNS N06025, applications, high temperature, corrosion resistance, oxidation, carburization, metal dusting, high temperature strength, creep, stress - rupture