Detailed Introduction to Inconel X750 High-Temperature Alloy Material
Inconel X750 is a precipitation-hardenable nickel-chromium alloy, celebrated for its exceptional high-temperature strength, good corrosion resistance, and excellent mechanical properties at both ambient and elevated temperatures. It is widely utilized in various high-performance applications across multiple industries.
Chemical Composition
The chemical composition of Inconel X750 is precisely tailored to achieve its remarkable properties, with the main components and their content ranges as follows:
Ni | Cr | Fe | Nb + Ta | Al | Ti | C | Mn | Si | S | Cu |
70.0% - 75.0% | 14.0% - 17.0% | 5.0% - 9.0% | 2.25% - 2.75% | 0.40% - 1.0% | 2.25% - 2.75% | ≤0.08% | ≤1.0% | ≤0.5% | ≤0.015% | ≤0.5% |
Physical Properties
Density: Approximately 8.28 g/cm³, providing a sturdy structure suitable for high-stress applications.
Melting Point: Ranges from 1390°C to 1425°C, enabling stable performance in high-temperature environments.
Thermal Expansion Coefficient: About 13.1×10⁻⁶/°C (20 - 100°C), 15.5×10⁻⁶/°C (20 - 500°C), helping to reduce thermal stress during temperature fluctuations.
Thermal Conductivity: Around 14.7 W/(m·K) at 20°C, 21.0 W/(m·K) at 500°C, facilitating effective heat transfer.
Electrical Resistivity: Approximately 1.29 μΩ·m at 20°C, 1.40 μΩ·m at 500°C, suitable for specific electrical component uses.
Magnetism: Non-magnetic in the annealed condition, making it ideal for magnetically sensitive applications.
Elastic Modulus: About 204 GPa at 20°C, 180 GPa at 500°C, offering good rigidity and resistance to deformation under mechanical loads.
Designations and Standards
United States: UNS N07750, specified in ASTM standards such as ASTM B637 (rod, bar, and wire), ASTM B670 (sheet, plate, and strip), and ASTM B666 (seamless pipe and tube). It is also covered by AMS specifications like AMS 5667 for aerospace applications.
Germany: Werkstoff Nr. 2.4669, compliant with DIN standards including DIN 17744 and DIN 17752, ensuring quality and consistency in industrial applications.
Other Regions: Corresponding designations exist in Japanese (e.g., NCF X750-like), French, and British standards, maintaining consistent performance benchmarks across global industries with slight variations in specific requirements.
