NiFe25Cr20NbTi
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NiFe25Cr20NbTi is a nickel-based superalloy with excellent high-temperature strength, oxidation resistance, and corrosion resistance. It is widely used in aerospace, petrochemical, and other fields.
Product name：
Galvanized square tube
Material：
Q335B
Warehouse：
Tianjin
Surface treatment：
Hot-dip galvanizing
Keyword：
NiFe25Cr20NbTi
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Details description
Chemical Composition
Nickel-based, with iron content of 23.0%-28.0%, chromium content of 18.0%-21.0%, and also containing 1.0%-2.0% titanium, 1.0%-2.0% niobium + tantalum, and small amounts of carbon, silicon, manganese, phosphorus, sulfur, boron, aluminum, etc.
Physical Properties
Density is 8.1g/cm³, melting point is approximately 1300℃. The coefficient of thermal expansion between 20℃ and 700℃ is approximately 13-16.8×10⁻⁶/K. Thermal conductivity at 20℃ is approximately 13W/(m・K), specific heat capacity is approximately 460J/(kg・K), and elastic modulus is approximately 215GPa.
Mechanical Properties
At room temperature, tensile strength can reach 900-1100MPa, yield strength can reach 500MPa, elongation after fracture ≥25%, and reduction of area ≥30%. In the annealed state, hardness ≤295HBW; after solution treatment and precipitation hardening, hardness ≥28HRC.
Performance Characteristics
By adding aluminum, titanium and other elements to form dispersed strengthening phases, it exhibits excellent high-temperature strength and can serve for a long time under high temperature and stress. At the same time, it has good oxidation resistance and corrosion resistance, and can resist the erosion of various corrosive media.
Processing Technology
Good cold and hot processing performance, but due to its high strength and hardness, special tools and coolants are required during processing. Heat treatment processes include solution treatment by heating to 1000-1080℃ followed by rapid cooling, and precipitation hardening treatment at 690-710℃.
Application Fields
It is commonly used in the manufacturing of jet engine turbine blades and combustion chamber components in the aerospace field; high-temperature reaction equipment and corrosion-resistant pipe fittings in the petrochemical field; high-temperature components of gas turbines and nuclear power generators in the energy field; high-performance engine exhaust valves and turbochargers in the automotive industry.
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