Hastelloy B3 flanges are high performance components made from Hastelloy B3, a nickel molybdenum alloy designed for superior.Hastelloy B3 Flanges are advanced nickel-molybdenum alloy flanges developed for exceptional resistance to hydrochloric acid and other highly reducing chemical environments. Compared to Hastelloy B2, Hastelloy B3 offers improved thermal stability, better fabrication characteristics, and enhanced resistance to stress corrosion cracking and heat-affected zone attack. These flanges are widely used in chemical processing, petrochemical, pharmaceutical, power generation, and pollution control industries where superior corrosion resistance is required.