Designated as UNS N06625 or W.Nr. 2.4856, Inconel 625, also known as Alloy 625, is a nickel-chromium-molybdenum alloy with an addition of niobium that act with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion and it has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. Inconel 625 can be used in chemical processing, aerospace and marine piping, pollution control equipment, and nuclear reactors. Usually it can be used at the temperature up to 980°C[1800°F] in oxidation service.

• It has excellent corrosion resistance to various corrosive media in oxidation and reduction environments.
• Excellent resistance to pitting and crevice corrosion, and will not produce stress corrosion cracking caused by chloride.
• Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid, and mixed acids of sulfuric acid and hydrochloric acid, etc.
• Excellent resistance to corrosion of various inorganic acid mixed solutions.
• When the temperature reaches 40℃, it can show good corrosion resistance in various concentrations of hydrochloric acid solution.
• Good processability and weldability, no susceptibility to cracking after welding.
• Manufacture certification for pressure vessels with a wall temperature of -196～450℃.
• Certified by the American Society of Corrosion Engineers NACE Standard (MR-01-75) to meet the highest standard grade VII for use in an acid gas environment.