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Inconel 718
Material Type
Metal
Material Name
Inconel 718
Process Compatibility
CNC Milling, CNC Turning
introduction
Inconel 718 in CNC Machining
Inconel 718 is a precipitation-hardening nickel-chromium alloy with high strength, corrosion resistance, and can withstand extreme temperatures.
When machining Inconel 718, we always consider these important factors: machine capacity, rigidity, tool sharpness, tool types (we prefer positive rake angle and carbide-tipped tools), positive cuts with constant feeds, and the use of lubricants, particularly soluble oils with carbide tooling.
Composed mostly of nickel, chromium, and iron, it has high tensile and yield strength. It can be easily fabricated and welded, though machining requires specialized tools due to its strength. Additionally, Inconel 718 can undergo precise heat treatments to optimize its properties.
Properties
Properties Table of Inconel 718
| MECHANICAL PROPERTIES | |
|---|---|
| Ultimate Tensile Strength | 900-930 MPa |
| Yield Strength | 490-510 MPa |
| Young's Modulus(Elasticity) | 190-200 GPa |
| Elongation at Break | 40-45% |
| Hardness | 80 HRC |
| Physical Property | |
| Corrosion Resistance | Excellent |
| Magnetism | Non-magnetic |
| Weldability | Excellent |
| Thermal Property | |
| Thermal Conductivity | 11-11.4 W/(m·°C) |
| Electrical Property | |
| Electrical Resistivity | 125 μΩ*cm |
TECHNOLOGY OVERVIEW
Basic Knowledge of Inconel 718
What is Inconel 718?
Inconel 718, developed in the 1960s, remains the preferred material for most aircraft engine parts with service temperatures under 1200°F (650°C).
It's a nickel-chromium alloy with iron, niobium, molybdenum, aluminum, and titanium, offering corrosion resistance, high strength, and good weldability, including resistance to post-weld cracking. The alloy maintains excellent creep-rupture strength up to 1300°F (700°C).
Advantages of Inconel 718
High-temperature resistance
Corrosion resistance
Excellent mechanical properties
Good fatigue strength
Weldability
Versatility in various applications
Applications of Inconel 718
Aerospace components
Gas turbine engine parts
Aircraft engine ducting systems
Rocket engine components
Chemical processing equipment
Industrial heating equipment
Springs and fasteners in high-temperature environments
FAQ
Machining Inconel 718 Buying FAQ
Yes, Inconel 718 is generally stronger than steel, especially at elevated temperatures.
Inconel 718 is often preferred over stainless steel for high-temperature and corrosion-resistant applications.
Disadvantages of Inconel 718 include high cost, difficulty in machining, and limited availability in certain forms.
No, Inconel 718 is not flammable; it has high resistance to heat and oxidation.
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