Products Features
Excellent High-temperature Strength
It exhibits outstanding high-temperature strength, creep resistance, and stress-rupture properties below 650°C, making it an ideal material for critical components in aerospace engines and gas turbines.
Good Corrosion Resistance
It has good oxidation resistance at high temperatures and good corrosion resistance to various corrosive media, including marine environments and acidic media, suitable for petrochemical and marine engineering applications.
Excellent Fatigue Performance
It demonstrates excellent resistance to low-cycle fatigue and thermal fatigue, maintaining stable performance under cyclic loading and temperature fluctuation conditions, suitable for fatigue-sensitive components such as turbine disks and compressor blades.
Good Machinability and Weldability
Compared to other precipitation-hardened nickel-based alloys, Inconel 718 offers superior cold and hot working properties as well as weldability, allowing it to be processed into various forms such as plates, bars, forgings, tubes, and fasteners.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
50.0 - 55.0% |
Matrix elements that provide corrosion and high-temperature resistance |
|
Cr |
17.0 - 21.0% |
Provide antioxidant and corrosion resistance capabilities |
|
Fe |
balance |
Structural support with cost considerations |
|
Nb+Ta |
4.75 - 5.50% |
Precipitation strengthening of key elements to form the γ" phase |
|
Mo |
2.80 - 3.30% |
Solid solution strengthening, enhancing high-temperature strength |
|
Ti |
0.65 - 1.15% |
Precipitation strengthening forms the γ' phase |
|
Al |
0.20 - 0.80% |
Precipitation strengthening forms the γ' phase |
|
C |
≤ 0.08% |
Strict control to maintain mechanical properties |
|
Si |
≤ 0.35% |
Deoxidizer, improve hot working properties |
|
Mn |
≤ 0.35% |
Deoxidizer, improve hot working properties |
|
P |
≤ 0.015% |
Strict control to prevent hot brittleness |
|
S |
≤ 0.015% |
Strict control to prevent hot brittleness |
|
Cu |
≤ 0.30% |
Residual Element |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.19 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1260 - 1335°C |
- |
|
Specific Heat Capacity |
435 J/kg·K |
20°C |
Mechanical Properties (Solution Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 1240 MPa |
ASTM B637 |
|
Yield Strength |
≥ 1000 MPa |
ASTM B637 |
|
Elongation |
≥ 12% |
ASTM B637 |
|
Hardness |
≤ 40 HRC |
- |
High-temperature Performance
At 538°C, the tensile strength remains above approximately 1000 MPa; at 650°C, it still stays above approximately 800 MPa.
Long-term operating temperature range
It is recommended for long-term operation within a temperature range of -253°C to 650°C, where it maintains good mechanical properties and stability.
Up to 700°C (for short-term exposure).
It exhibits excellent creep resistance and stress-rupture properties below 650°C, making it suitable for high-temperature load-bearing components such as turbine disks and blades.
It has good oxidation resistance in high-temperature environments and shows good corrosion resistance to marine environments, acidic media, and chlorine-containing environments.
Through solution treatment plus aging heat treatment (solution temperature 940-1010°C, aging treatment 720°C/8h furnace cooled to 620°C/8h), γ\" and γ' precipitation strengthening phases are obtained, achieving excellent high-temperature strength.
Application Fields
-
Aerospace engines (turbine disks, compressor disks, blades, casings, fasteners)
-
Gas turbines (turbine blades, combustion chamber components)
-
Nuclear industry (reactor components, nuclear fuel element positioning grids)
-
Petrochemical industry (downhole tools, wellhead equipment, acidic gas treatment)
-
Automotive industry (high-performance turbocharger components)
-
Cryogenic engineering (liquid hydrogen/liquid oxygen storage tanks, ultra-low-temperature fasteners)
-
Offshore engineering (subsea Christmas trees, pump and valve components)
-
Mold industry (high-temperature extrusion molds, hot work molds)
-
Power generation systems (supercritical power plant components)
-
High-temperature springs and precision hardware parts
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Inconel 718 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/ thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us as Your Supplier? - Reliable engineering technology. Dependable delivery.
We are more than just a supplier; we are your trusted material partner in China.
Vertically Integrated Production
With 20,000 square meters of owned facilities and over 10 automated production lines (annual capacity of over 8,000 tons). An internal mold center supports rapid customization and effective cost control, with no markup from intermediaries.
Strict Quality Control is Implemented At Each Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment.
Reliable Delivery and Export Packaging
With over 10 years of experience exporting to Europe, North America, Southeast Asia, and the Middle East, our products are equipped with waterproof and rustproof protection. Combined with flexible shipping options, this ensures safe and timely delivery of goods.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of Inconel 718?
Q: What kind of heat treatment does Inconel 718 require?
Q: What is the maximum operating temperature?
Q: What is the difference from Inconel 625?
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