Detailed Introduction to Inconel 625 High-Temperature Alloy Material
Inconel 625 is a high-performance nickel-based superalloy, renowned for its exceptional corrosion resistance and high-temperature strength. It excels in harsh environments involving extreme temperatures, chemicals, and mechanical stress, making it a vital material in numerous advanced industrial sectors.
Chemical Composition
The chemical composition of Inconel 625 is precisely engineered to deliver superior performance, with the main components and their content ranges as follows:
Ni | Cr | Mo | Nb + Ta | Fe | Co | C | Si | Mn | S |
≥58% | 20.0% - 23.0% | 8.0% - 10.0% | 3.15% - 4.15% | ≤5.0% | ≤1.0% | ≤0.10% | ≤0.5% | ≤0.5% | ≤0.015% |
Physical Properties
Density: Approximately 8.44 g/cm³, providing a robust structure suitable for heavy-duty high-temperature applications.
Melting Point: Ranges from 1290°C to 1350°C, enabling stable performance in high-temperature operational conditions.
Thermal Expansion Coefficient: About 12.8×10⁻⁶/°C (20 - 100°C), 15.3×10⁻⁶/°C (20 - 500°C), helping reduce thermal stress during temperature variations.
Thermal Conductivity: Around 9.8 W/(m·K) at 20°C, 15.1 W/(m·K) at 500°C, facilitating effective heat transfer in relevant applications.
Electrical Resistivity: Approximately 1.29 μΩ·m at 20°C, 1.41 μΩ·m at 500°C, suitable for specific electrical component applications.
Magnetism: Non-magnetic, making it ideal for use in environments where magnetic interference must be avoided.
Elastic Modulus: About 208 GPa at 20°C, 186 GPa at 500°C, offering good rigidity and deformation resistance under mechanical loads.
Designations and Standards
United States: UNS N06625, specified in ASTM standards such as ASTM B446 (seamless pipe and tube), ASTM B447 (welded pipe and tube), and ASTM B166 (rod and bar). It is also covered by AMS specifications like AMS 5599 for aerospace applications.
Germany: Werkstoff Nr. 2.4856, compliant with DIN standards including DIN 17742 and DIN 17750, ensuring quality and consistency in German industrial applications.
Other Regions: Corresponding designations exist in Japanese (e.g., NCF 625-like), French, and British standards, maintaining uniform performance benchmarks across global industries with slight variations in specific requirements.
