Views: 0 Author: Site Editor Publish Time: 2025-12-26 Origin: Site
Inconel 625 is a nickel-based alloy with excellent corrosion resistance and oxidation resistance. This alloy is widely used in aerospace, marine engineering, chemical processing, pollution control equipment, and nuclear reactors due to its reliability and durability in a variety of harsh environments. Inconel 625 is designed to provide high strength and excellent resistance to fluid corrosion, making it an ideal material for manufacturing a variety of complex components.
Excellent Corrosion Resistance: Inconel 625 performs exceptionally well in various corrosive environments, especially in seawater where it exhibits excellent resistance to pitting and crevice corrosion. It has high resistance to chloride-induced stress corrosion cracking, making it suitable for marine engineering and chemical processing equipment.
High Temperature Strength: Inconel 625 maintains high creep rupture strength and oxidation resistance at temperatures up to 1800°F (approximately 982°C), making it suitable for components operating in high-temperature environments.
Excellent weldability: This alloy exhibits excellent weldability and is suitable for various welding methods, including gas tungsten inert gas (GTAW), gas metal arc welding (GMAW), electron beam welding, and resistance welding.
Non-magnetic: Inconel 625 is non-magnetic, making it suitable for applications sensitive to magnetism.
Aerospace: Used in aircraft ducting systems, jet engine exhaust systems, and thrust reversers to ensure stable operation in high-temperature and corrosive environments.
Marine Engineering: Suitable for manufacturing specialized seawater equipment, such as pumps and valves, resistant to seawater corrosion.
Chemical Treatment: Widely used in chemical treatment equipment, such as pipelines, reactors, and storage tanks, resistant to corrosion from various chemical media.
Pollution Control Equipment: Used to manufacture components in pollution control equipment, such as exhaust gas treatment systems and wastewater treatment equipment.
Nuclear Reactors: Suitable for structural components in nuclear reactors, ensuring long-term stability and safety in radioactive environments.
Hot Working: Forging and hot working should be performed within a strict temperature range, typically between 2100°F and 2150°F (approximately 1149°C to 1177°C). Processing should be avoided in the temperature range of 1400°F to 1000°F (approximately 760°C to 538°C), as the alloy is prone to hot cracking in this range.
Cold Working: Inconel 625 has good cold working properties and can be formed using conventional cold working methods. However, due to the alloy's tendency to work harden during cold working, intermediate annealing may be necessary for complex forming operations to restore the material's ductility and eliminate internal stresses.
Welding: When welding, filler material with a composition matching the base metal should be selected to ensure the performance of the weld joint. The weld surface should be cleaned before welding to remove oil, paint, and other impurities to avoid welding defects.
Machining: Inconel 625 can be machined using standard methods. Due to the alloy's high strength and toughness, it is prone to work hardening during machining. Therefore, high-rigidity machine tools and sharp cutting tools are required to reduce tool wear and improve machining efficiency. Water-based cutting fluids are recommended for cooling to lower cutting temperatures and reduce tool wear.
Chemical Composition (%): Carbon (C) ≤0.1%, Magnesium (Mg) ≤0.5%, Aluminum (Al) ≤0.4%, Silicon (Si) ≤0.5%, Phosphorus (P) ≤0.015%, Sulfur (S) ≤0.015%, Titanium (Ti) ≤0.4%, Chromium (Cr) 20.0% - 23.0%, Iron (Fe) ≤5.0%, Cobalt (Co) ≤1.0%, Nickel (Ni) ≥58.0%, Molybdenum (Mo) 8.0% - 10.0%, Niobium Carbide + Zirconium (Cb(Nb+Ta)) 3.15% - 4.15%.
Physical properties: density 8.44 g/cm³, specific heat capacity 0.098 Kcal/kg·C (21°C), melting range 1290°C - 1350°C, elastic modulus 207.5 KN/mm² (21°C), resistivity 129 µΩ·cm (21°C), coefficient of thermal expansion 12.8 µm/m °C (21°C - 93°C), thermal conductivity 9.8 W/m -°K (21°C).
