UNS N10675 is a material specification for a nickel-molybdenum-chromium alloy that is known by the trade name Hastelloy B-3. It is part of the Hastelloy family of alloys, which are highly corrosion-resistant and designed to perform well in a variety of aggressive environments, including those with strong acids and oxidizing chemicals.
Hastelloy B3 (UNS N10675) is specifically engineered to have improved resistance to hydrochloric acid at all concentrations and temperatures compared to other nickel-based alloys. This makes it an excellent choice for applications in chemical processing, petrochemical, and other industries where exposure to corrosive media is prevalent.
Hastelloy B-3 offers a good combination of mechanical properties, high-temperature strength, and exceptional corrosion resistance, particularly in reducing environments containing hydrochloric, sulfuric, and phosphoric acids. It can be used in various forms, including pipes, tubes, fittings, flanges, elbows, tees, plates, and more, to meet the demands of different applications.
The composition of alloy B3 UNS N10675 typically includes:
Nickel (Ni): Approximately 65%
Molybdenum (Mo): Approximately 28-32%
Chromium (Cr): Approximately 1.5-3%
Iron (Fe): Maximum of 3%
Other elements in smaller amounts: Cobalt (Co), tungsten (W), manganese (Mn), silicon (Si), carbon (C), sulfur (S), etc.
