As technology and engineering evolve, so do the materials used to build them. Inconel 713C is a material that has grown in popularity in the aerospace, automotive, and energy industries. It is a nickel-based superalloy that boasts exceptional mechanical and physical properties. This article will deeply dive into Inconel 713C- its composition, properties, and uses.
What is Inconel 713C?
Inconel 713C is a superalloy containing nickel-chromium-molybdenum, designed for applications requiring excellent strength and high creep-rupture properties at temperatures up to 2200°F (1200°C). Its composition includes approximately 16% chromium, 9% molybdenum and 8.5% nickel, providing superior corrosion and oxidation resistance in highly corrosive environments.
Inconel 713C Composition
Inconel 713C is a nickel-chromium-based superalloy with the addition of Al, Ti, and Nb. These elements improve the material’s high-temperature strength and corrosion resistance. The composition of Inconel 713C is:
- Nickel (Ni) – 58.5%
- Chromium (Cr) – 15%
- Aluminium (Al) – 5.5%
- Titanium (Ti) – 3.5%
- Tungsten (W) – 4.5%
- Molybdenum (Mo) – 2.5%
- Columbium (Nb) – 1.5%
- Iron (Fe) – 3%
- Others (C, Si, Mn, S, P) – 6.5%
Inconel 713C Mechanical Properties
The mechanical properties of Inconel 713C make it an ideal choice for high-performance applications. It has a high yield strength of 140,000 psi and a tensile strength of 150,000 psi. It also has excellent fatigue resistance and can withstand cyclic loading at high temperatures.
Inconel 713C Physical Properties
Besides its excellent mechanical properties, Inconel 713C also boasts unique physical properties. It has a density of 8.1 g/cm³ and a melting point of 1370-1415°C. Its coefficient of thermal expansion is 12.3 µm/m°C at 20°C, and it has a thermal conductivity of 9.7 W/mK.
Inconel 713C Uses
Inconel 713C is used in many high-performance applications, particularly in the aerospace and automotive industries. Its superior mechanical and physical properties make it ideal for parts that need to sustain high temperatures, such as turbine blades, heat exchangers, and exhaust systems. It is also used in industrial gas turbines, particularly for power generation.
Inconel 713C Corrosion Resistance
Inconel 713C has excellent corrosion resistance in high-temperature environments, making it an ideal choice for many applications. It resists oxidation and sulfidation at high temperatures and maintains its mechanical properties in harsh environments.
Inconel 713C Heat Treatment
Inconel 713C can be heat-treated to enhance its properties further. Annealing at 760-870°C for 8-16 hours, followed by air cooling, will improve its ductility and toughness. Precipitation hardening at 982-1010°C for 16-24 hours, followed by air cooling, will further enhance its strength.
Inconel 713C Machining
Inconel 713C is known for its difficulty in machining due to its high hardness and strength. Carbide tools are recommended for machining. Proper coolant and cutting speed are essential to prevent tool wear and surface damage.
Inconel 713C Welding
Inconel 713C can be welded using gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW). However, it is crucial to preheat the material to prevent cracking during welding.
Conclusion
Inconel 713C is a nickel-based superalloy that has gained popularity in high-performance applications due to its superior mechanical and physical properties. Its composition contains elements that improve its high-temperature strength and corrosion resistance. It is used in applications such as turbine blades, heat exchangers, and exhaust systems in the aerospace and automotive industries. Inconel 713C has excellent corrosion resistance and can be heat-treated to further enhance its properties. While machining and welding can be challenging, the benefits of using Inconel 713C in high-temperature applications outweigh the difficulties.
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