1. What is the ASTM grade of Inconel 617?
2. What are the mechanical properties of inconel 617?
Tensile Strength: At room temperature, the tensile strength is about 734 - 769 MPa. At high temperatures (1000℃), it is 210 MPa.
Yield Strength: The yield strength (0.2% offset) of hot - rolled plate, bar, and cold - drawn tubing is 318 - 383 MPa.
Elongation: The elongation of hot - rolled plate, bar, and cold - drawn tubing is 56 - 62%.
Hardness: The Brinell hardness of hot - rolled plate, bar, and cold - drawn tubing is 172 - 193 HB.
Modulus of Elasticity: At 25℃, the tensile modulus of elasticity is 211 GPa, and the shear modulus is 81 GPa.
3.What is the chemical composition of inconel 617?
Nickel (Ni): ≥44.5%
Chromium (Cr): 20.0 - 24.0%
Cobalt (Co): 10.0 - 15.0%
Molybdenum (Mo): 8.0 - 10.0%
Aluminum (Al): 0.8 - 1.5%
Carbon (C): 0.05 - 0.15%
Iron (Fe): ≤3.0%
Manganese (Mn): ≤1.0%
Silicon (Si): ≤1.0%
Sulfur (S): ≤0.015%
Titanium (Ti): ≤0.6%
Copper (Cu): ≤0.5%
Boron (B): ≤0.006%
4. What is the application of inconel 617?
Nuclear Energy: It is used as the core structural material in the fourth - generation nuclear reactors, such as the heat exchanger pipes and reactor linings of molten salt reactors (MSR) and very - high - temperature gas - cooled reactors (VHTR), which can withstand the corrosion of high - temperature molten salt and neutron irradiation. It is also used for the plasma first - wall protection components in nuclear fusion devices to resist high - energy particle bombardment and helium gas penetration.
Aerospace and Gas Turbines: It is used for the combustion chambers and turbine blades of gas turbines. It can withstand the scouring of 1400℃ gas in heavy - duty gas turbines, and the temperature - resistance limit can be further improved by coating with thermal barrier coatings (TBC).
Coal Chemical Industry: It is used for the high - temperature components in the synthesis gas (CO + H₂) environment of coal chemical gasifiers to resist sulfurization and ash erosion.
Solar Thermal Power Generation: It is used as the pipeline material of the molten salt heat - storage system to resist the long - term corrosion of 565℃ molten nitrate.
5.What are the advantages of inconel 617?
Excellent High - Temperature Performance: It has outstanding high - temperature strength and can maintain good mechanical properties at high temperatures. It can work at 1200 - 950°C and has good short - term and long - term mechanical properties at up to 1100°C
. In the range of 700 - 950°C, its service life is 30% - 50% longer than that of Haynes 230 alloy
Good Corrosion Resistance: It has excellent resistance to oxidation, sulfidation, and chloride corrosion
. In high - temperature oxidizing environments, it can form a dense chromium - oxide film to protect the base metal from further oxidation damage. The addition of molybdenum improves the corrosion resistance in chloride - containing and acidic media. It also has good resistance to stress - corrosion cracking in high - temperature chloride - containing media
Good Weldability: It can be welded by various welding methods such as gas - shielded welding, arc welding, and laser welding
. After welding, the welded joints of the alloy also maintain good mechanical properties and corrosion resistance at high temperatures
Good Metallurgical Stability: For an alloy of its strength level, Inconel 617 shows unusually good metallurgical stability
. When exposed to temperatures of 1100 - 1400°F, although the alloy experiences an increase in strength and a decrease in ductility, no embrittling phases are formed
