Nickel-based alloys, due to their high melting point, high reactivity, and tendency to segregate, require strict process control. Currently, the following methods are mainly used for casting the custom parts. Investment Casting (Lost-Wax Casting) is the most widely used method, suitable for complex thin-walled parts; commonly used for turbine blades and guide vanes in aero-engines; while the vacuum Casting effectively reduces gas content and inclusions.
Applicable Industries of Nickel Base Alloy Castings:
Aerospace
Typical components: Aero-engine turbine blades, turbine disks, combustion chamber flame tubes, casings and rings, rocket engine nozzles, thrust chambers.
Energy & Power
Typical components: Gas turbine blades and disks, superheater/reheater tubes for thermal power boilers, high-temperature fasteners (bolts, springs), heat transfer tubes for nuclear power steam generators, nuclear reactor internals.
Petrochemicals
Typical components: Heat exchanger and condenser tube bundles, high-temperature and high-pressure piping systems, valves, pump bodies, agitator shafts, key components for flue gas desulfurization systems
Marine Engineering
Typical components: Seawater coolers and heat exchangers, ship propeller shafts, fasteners for deep-sea oil production systems, evaporators for seawater desalination units
Industrial Manufacturing
Typical components: Automotive turbocharger rotors, radiant tubes for heat treatment furnaces, furnace rollers, glass manufacturing molds and tools, reaction chambers for semiconductor manufacturing equipment, high-performance molds (die casting, extrusion)
| Grades, Properties, Applications and Characteristics of Nickel Based Alloy Castings | ||||
| Grades | Chemical composition (wt.%) | Mechanical properties | Applications | Characteristics |
| Inconel 600 | Ni: ≥ 72.0% Cr: 14.0 - 17.0% Fe: 6.0 - 10.0% Mn: ≤ 1.0% C: ≤ 0.15% Si: ≤ 0.5% S: ≤ 0.015% P: ≤ 0.04% Cu: ≤ 0.5% Co: ≤ 1.0% (typically) Cb/Nb/Ta: ≤ 1.0% (typically) Ti/Al: ≤ 0.5% |
Tensile strength: 550-750 MPa Yield strength: ≥240 MPa Elongation: ≥30% |
Internal components of heat treatment furnaces; alkali production equipment; heat transfer tubes of nuclear power steam generators; electronic components. | 1. Resistant to high-temperature oxidation and carburization: Forms a dense oxide film at high temperatures. 2. Excellent resistance to alkali corrosion: Particularly suitable for molten alkali and sodium hydroxide environments. 3. Good processing and welding properties. |
| Inconel 625 | Ni: 58.0 - 63.0% Cr: 20.0 - 23.0% Mo: 8.0 - 10.0% Nb: 3.15 - 4.15% Fe: ≤ 5.0% Co: ≤ 1.0% Ti: ≤ 0.40% Al: ≤ 0.40% C: ≤ 0.10% Si: ≤ 0.50% Mn: ≤ 0.50% P: ≤ 0.015% S: ≤ 0.015% Ta: ≤ 0.05% |
Tensile strength: ≥830 MPa Yield strength: ≥415 MPa Elongation: ≥30% |
Marine engineering structural components and seawater pipelines; aerospace engine exhaust systems and combustion chambers; chemical reactors; nuclear power equipment. | 1. Excellent overall performance: Possesses both excellent corrosion resistance and high strength. 2. Resistant to fatigue, oxidation, and hot corrosion: Wide operating temperature range (from low temperatures to 980°C). 3. Excellent weldability: No heat treatment required after welding. |
| Inconel 718 | Ni: 50-55% Cr: 17-21% Fe: Remaining Nb+Ta: 4.75-5.5% Mo: 2.8-3.3% Co：1.00% (max) Mn：≤ 0.35% Si：≤ 0.35% C：≤ 0.08% S：≤ 0.015% P：≤ 0.015% B：≤ 0.006% Cu：≤ 0.30% |
Tensile strength: ≥1240 MPa Yield strength: ≥1030 MPa Elongation: ≥12% |
Aero-engine turbine disks, blades, and casings; engine components; nuclear power plant fasteners; high-performance molds. | 1. Excellent high strength and mid-temperature performance: Exhibits extremely high strength below 650°C. 2. Good weldability and machinability: Outstanding among precipitation-strengthened alloys. 3. Most widely used: Accounts for more than half of all high-temperature alloys used. |
| Monel 400 | Ni: 63.0%-70.0% Cu: 28.0%-34.0% Fe: ≤ 2.5% Mn: ≤ 2.0% Si: ≤ 0.50% C: ≤ 0.3% S: ≤ 0.024% |
Tensile strength: ≥550 MPa Yield strength: ≥240 MPa Elongation: ≥35% |
Seawater heat exchangers, pump shafts, valves; marine propellers; equipment for alkali production; hydrofluoric acid production units. | 1. Excellent resistance to seawater corrosion: Resistant to high-speed seawater erosion and marine atmospheric corrosion. 2. Resistant to hydrofluoric acid and alkaline solutions: Performs well in reducing media. 3. Higher mechanical strength than pure copper and many stainless steels. |
| Hastelloy C-276 | Ni: Remaining Cr: 14.5-16.5% Mo: 15.0-17.0% Fe: 4.0-7.0% W: 3.0-4.5% C: ≤ 0.01% Co: ≤ 2.5% (max) Mn: ≤ 1.0% Si: ≤ 0.08% V: ≤ 0.35% P: ≤ 0.04% S: ≤ 0.03% |
Tensile strength: ≥690 MPa Yield strength: ≥283 MPa Elongation: ≥40% |
Environmental equipment; flue gas desulfurization systems; chemical reactors and heat exchangers. | 1. Corrosion-resistant alloy: Exhibits excellent corrosion resistance in both oxidizing and reducing media. 2. Top-tier resistance to localized corrosion: Extremely resistant to pitting corrosion, crevice corrosion, and stress corrosion cracking. 3. Good weldability. |
Hot Tags: nickel based alloy casting, nickel based lost wax casting, nickel alloy lost wax casting
