Overview of the uses of Inconel625 alloy
Inconel625 is a nickel-based deformed high-temperature alloy. It has excellent corrosion resistance and oxidation resistance. It also has good tensile and fatigue properties. It is used as a thin plate material and still has excellent oxidation resistance at 1315°C. In the aerospace and nuclear industries.
Properties of Inconel625 nickel-based corrosion-resistant alloy
Inconel625 has excellent corrosion resistance to various corrosive media in oxidizing and reducing environments, has good resistance to pitting corrosion and crevice corrosion, and will not produce stress corrosion cracking due to chloride. The alloy has good resistance to corrosion by inorganic acids, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and mixed acids of sulfuric acid and hydrochloric acid, and corrosion resistance by various inorganic acid mixed solutions.
When the temperature reaches 40℃, Inconel625 can show good corrosion resistance in hydrochloric acid solutions of various concentrations, good processability and weldability, no post-weld cracking sensitivity, and has the ability to withstand walls between -196~450℃. Manufacturing certification of pressure vessels.
Inconel625 is certified to the American Society of Corrosion Engineers NACE standard (MR-01-75) to meet the high standards of Class VII for use in sour gas environments.
Physical performance analysis of Inconel625:
Density 8.4g/cm³
Melting point 1290-1350℃
Variety Heat treatment method Tensile strength
σb/MPa yield strength
σp0.2/MPa elongation
δ5/% Brinell hardness HBS
Plate and strip solution treatment 830 415 30 150-220
Rod solution treatment 830 415 30 150-220
Analysis of the mechanical properties of Inconel625 alloy at room temperature:
Alloy status Tensile strength N/mm² Yield strength Rp0.2 N/mm² Elongation A5% Brinell hardness HB
Solid solution treatment 760 345 30 ≤220
Metallographic structure analysis of Inconel625:
625 is a face-centered cubic lattice structure. When kept at about 650°C for a long enough time, carbon particles and unstable quaternary phase will precipitate and be converted into a stable Ni3 (Nb, Ti) orthorhombic lattice phase. After solid solution strengthening, the molybdenum and niobium components in the nickel-chromium matrix will improve the mechanical properties of the material, but the plasticity will be reduced.
