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Cryogenic Engineering Nickel Alloy Inconel 718 UNS N07718 2.4668 Alloy Strip/Foil With Stable Mechanical Properties
Product Introduction
Inconel 718 strip is a high-performance nickel-chromium-iron-based precipitation-hardened alloy strip with a wide range of applications in cryogenic engineering. The alloy performs well in the temperature range of -253°C to 700°C, with high strength, good toughness and excellent corrosion resistance. Its main components include nickel (about 50%-55%), chromium (17%-21%), niobium (4.75%-5.5%), molybdenum (2.8%-3.3%), etc., which enable it to maintain stable mechanical properties in cryogenic environments. The density of Inconel 718 strip is about 8.19 g/cm³, the melting point is between 1260-1330°C, the tensile strength is about 1400 MPa at room temperature, the yield strength is about 1150 MPa, and the ductility is about 25%. In cryogenic engineering, Inconel 718 strip is often used to manufacture cryogenic storage containers such as liquid nitrogen and liquid hydrogen, as well as structural parts that need to work under extreme low temperature conditions. In addition, the alloy also has good weldability and processability, and can be subjected to various forms of welding and machining in the annealed or aged state. These characteristics make Inconel 718 strip an ideal material choice in cryogenic engineering.
Parameter
Chemical Properties of Inconel 718
Chemical Composition: Inconel 718 Wire primarily consists of nickel, chromium, iron, and other alloying elements such as cobalt, molybdenum, aluminum, and titanium.
Density: Approximately 8.2 g/cm³.
Melting Point: Approximately 1,330°C.
Tensile Strength: It exhibits high tensile strength, enabling it to maintain its mechanical properties at high temperatures.
Coefficient of Thermal Expansion: Approximately 12.8 × 10^(-6) /°C (within the range of 20-1000°C).
| Item | C | Mn | Fe | P | S | Si | Cu | Ni | Co | Al | Ti | Cr | Nb+Ta | Mo | B |
| Inconel 718 | ≤0.08 | ≤0.35 | rest | -- | ≤0.01 | ≤0.35 | ≤0.3 | 50-55 | ≤1 | 0.2-0.8 | -- | 17-21 | 4.75-5.5 | 2.8-3.3 | -- |
| AMS Number | Alloy | Type | UNS | Cross Ref. Spec | Misc./Shape |
|---|---|---|---|---|---|
| AMS 5590 | Inconel 718 | Nickel | N07718 | - | Tubing |
| AMS 5596 Foil | Inconel 718 | Nickel | N07718 | - | Foil |
| AMS 5596 Plate | Inconel 718 | Nickel | N07718 | - | Plate |
| AMS 5596 Sheet | Inconel 718 | Nickel | N07718 | - | Sheet |
| AMS 5596 Strip | Inconel 718 | Nickel | N07718 | - | Strip |
| AMS 5597 Plate | Inconel 718 | Nickel | N07718 | - | Plate |
| AMS 5597 Sheet | Inconel 718 | Nickel | N07718 | - | Sheet |
| AMS 5597 Strip | Inconel 718 | Nickel | N07718 | - | Strip |
| AMS 5662 Bar | Inconel 718 | Nickel | N07718 | - | Bar |
| AMS 5662 Custom Tube | Inconel 718 | Nickel | N07718 | - | Custom Tube |
| AMS 5662 Ring | Inconel 718 | Nickel | N07718 | - | Ring |
| AMS 5663 Bar | Inconel 718 | Nickel | N07718 | - | Bar |
| AMS 5663 Custom Tube | Inconel 718 | Nickel | N07718 | - | Custom Tube |
| AMS 5663 Ring | Inconel 718 | Nickel | N07718 | - | Ring |
| AMS 5664 Bar | Inconel 718 | Nickel | N07718 | - | Bar |
| AMS 5664 Custom Tube | Inconel 718 | Nickel | N07718 | - | Custom Tube |
| AMS 5664 Ring | Inconel 718 | Nickel | N07718 | - | Ring |
| AMS 5832 | Inconel 718 | Nickel | N07718 | - | Wire |
| AMS 5962 Bar | Inconel 718 | Nickel | N07718 | - | Bar |
| AMS 5962 Wire | Inconel 718 | Nickel | N07718 | - | Wire |
| Size Range (mm) | |
| Wire | 0.5-7.5 |
| Rod/Bar | 8.0-200 |
| Strip | (0.50-2.5)*(5-180) |
| Tube | custom made |
| Plate | custom made |
Specific Applications
Advantages and Characteristics
Summary
Inconel 718 Strip is widely used in cryogenic storage containers, cryogenic piping systems, cryogenic pumps and valves, cryogenic experimental equipment, and cryogenic components of spacecraft and satellites in the field of cryogenic engineering due to its excellent low-temperature stability, outstanding corrosion resistance, high strength and good toughness, ensuring the long-term stable operation of equipment in extreme low-temperature environments.
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Related Questions and Answers
Q: What are the advantages of Inconel 718 Strip?
A: Inconel 718 Strip has excellent high temperature strength, corrosion resistance, good weldability and processability, can maintain good strength and toughness at temperatures up to about 700°C, and is suitable for high temperature and high stress environments.
Q: What are the main application areas of Inconel 718 Strip?
A: Inconel 718 Strip is widely used in aerospace, petrochemical, nuclear industry and other fields, especially in parts that need to withstand high temperature and high stress, such as turbine blades, turbine discs, combustion chambers, gas ducts, etc.
Q: Compared with Inconel 600 Strip, which one is more suitable for high temperature environment?
A: Inconel 718 Strip performs better in high temperature environment, has higher strength and better oxidation resistance, and is suitable for high temperature environment above 700°C.
Q: What is the corrosion resistance of Inconel 718 Strip?
A: Inconel 718 Strip has excellent corrosion resistance, especially in seawater, alkaline and acidic environments, and has good resistance to pitting corrosion, intergranular corrosion and crevice corrosion.
