Alloy 625 also commonly known as Inconel 625 is a Nickel – Chromium – Molybdenum alloy with excellent resistance to a range of severely corrosive environment,particularly to pitting and crevice corrosion,and with high strength from cryogenic temperatures to around 980°C (1500°F),and good oxidation -resistance at high temperatures.Application include chemical processing marine and off shore engineering,pollution control,nuclear engineering and aerospace, Inconel alloy 625 has composition and processing controlled to provide optimum resistance to low-cycle and thermal fatigue at temperatures upto 650°C(1200°F)