The Difference Between Inconel 625 And Incoloy 825 Alloy

  Inconel625 alloy is a solid solution reinforced nickel-based deformation high temperature alloy with molybdenum and niobium as the main strengthening elements, has excellent corrosion resistance and get oxidation properties, from low temperature to 980 ℃ have good tensile properties and fatigue properties, and resistance to stress corrosion under salt spray atmosphere, so it can be widely used in the manufacture of aero-engine parts, aerospace structural components and chemical equipment, the alloy is used in the manufacture of Engine magazine, guide blade, mounting edge and barrel, fuel main tube and other parts, has passed the practical application test, the highest use temperature of 950 ℃; alloy in 550 ~ 700 ℃ after long-term use there is a certain aging hardening phenomenon, resulting in the alloy plasticity has some decline.

       A, Inconel625 alloy metallographic structure

       Inconel625 is face-centered cubic lattice structure. When held at about 650 ℃ for a long enough time, will precipitate carbon particles and unstable quaternary phase and will be transformed into a stable Ni3 (Nb, Ti) rhombohedral lattice phase. Solid solution strengthening of the nickel-chromium matrix of molybdenum and niobium components will improve the mechanical properties of the material, but the plasticity will be reduced.

       II. Inconel 625 alloy corrosion resistance

       Inconel 625 alloy in many media have shown good corrosion resistance. It has excellent resistance to pitting, crevice corrosion, intergranular corrosion and erosion in chloride media. Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, and hydrochloric acid, as well as resistance to alkali and organic acid corrosion in oxidizing and reducing environments. Effective resistance to chloride ion reductive stress corrosion cracking. Virtually non-corrosive in seawater and industrial gas environments, and highly resistant to seawater and salt solutions, as well as at high temperatures. No sensitivity in welding process. Resistant to carbonization and oxidation in static or cyclic environments, and resistant to corrosion by gases containing chlorine.

       Third, Inconel 825 alloy corrosion resistance

       Incoloy 825 is a titanium-stabilized all-austenitic nickel-iron-chromium alloy with the addition of copper and molybdenum. incoloy 825 is a versatile engineering alloy with resistance to acid and alkali metal corrosion in both oxidizing and reducing environments. incoloy 825's high overall performance is demonstrated by the variety of corrosive media in nuclear combustion dissolvers, such as sulfuric acid, nitric acid and sodium hydroxide all in the The same equipment processing.

       Fourth, 625 and 825 comparison of the two differences

       Inconel625 alloy steel is molybdenum, niobium as the main strengthening elements of solid solution strengthening nickel-based deformation of high-temperature alloy, with excellent corrosion resistance and get oxidation properties, from low temperature to 980 ℃ have good tensile properties and fatigue properties, and resistance to stress corrosion in the salt spray atmosphere.

       Inconel 825 alloy steel is a titanium-stabilized all-austenitic nickel-iron-chromium alloy with the addition of copper and molybdenum, a versatile engineering alloy with resistance to acid and alkali metal corrosion in both oxidizing and reducing environments.