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Jul 23 2026UNS N07713, Alloy 713C, W.Nr. 2.4671, K418
UNS N07713 is a nickel based precipitation strengthened superalloy developed specifically for investment casting. Known for its high strength, creep resistance, and oxidation protection at elevated temperatures, this alloy is widely used in aerospace turbines, industrial gas turbines, and automotive turbocharger components. As a global supplier of advanced alloys, Ronsco provides high quality Inconel 713C products in both raw materials and finished components. Our expertise and supply capabilities ensure customers receive precision castings, certified materials, and customized solutions for demanding high temperature applications.
Excellent castability with investment casting.
Reliable oxidation resistance up to 950 °C.
Good creep and fatigue strength for turbine service.
Cost effective compared to newer advanced superalloys.
Aerospace Industry: Gas turbine blades and vanes, Combustion chamber parts, Nozzle guide vanes, Afterburner components
Power Generation: Industrial gas turbine hot section blades, Transition ducts, Stationary vanes and seals
Automotive: Turbocharger turbine wheels for high performance engines, Exhaust system components in motorsports
Industrial Uses: Furnace components, Hot tooling parts exposed to oxidizing conditions, Equipment in chemical processing exposed to sulfur and fuel impurities
|
Material |
Ni |
Cr |
Mo |
Nb |
Al |
Ti |
C |
|
Alloy713C |
Balance |
12.5 |
4.5 |
2.0 |
6.0 |
0.6 |
0.12 |
Density：8.0g/cm3
Melting temperature：1260-1335℃
Specific heat at 76°F (26°C): 0.100Btu/lb-°F (419J/kg-°C)
Electrical Resistivity at 78°F (26°C): 736 ohm-circ mil/ft (1.22 uΩ-m)
|
Material |
Tensilestrength MPa |
Yieldstrengthat0.2offsetMPa |
Elongation(%) |
|
Alloy 713C |
900–1050 MPa |
700–800 MPa |
5-10 |
Inconel 713C has an austenitic face-centered cubic (FCC) microstructure, providing excellent ductility and resistance to thermal fatigue. Precipitation-hardening elements such as titanium and aluminum form a gamma prime (γ') phase, enhancing strength and stability at elevated temperatures. The alloy’s structure resists grain boundary precipitation, minimizing embrittlement during thermal cycling. With niobium further stabilizing the microstructure, Inconel 713C maintains its mechanical properties even after prolonged exposure to high temperatures, ensuring reliable performance in aerospace and energy applications.
Alloy 713C is a casting-only superalloy designed for investment casting. It is not produced in wrought forms such as bar, plate, sheet, or tube. Due to its high gamma prime (γ′) volume fraction (~60%), hot working (forging, rolling, extrusion) is not recommended or practiced.
The alloy exhibits excellent fluidity and castability, making it well suited for complex thin-walled geometries such as turbine blades, nozzles, and turbocharger wheels. Investment casting with vacuum melting is the standard production method.
Alloy 713C is typically used in the as-cast condition. When improved stress-rupture life is required, the following heat treatment cycle is recommended (per AMS 5391 / HB 5162):
|
Step |
Temperature |
Time |
Cooling |
|
Solution |
1175 °C (2150 °F) |
2 hours |
Air cool |
|
Stabilizing |
925 °C (1700 °F) |
16 hours |
Air cool |
|
Precipitation (optional) |
800–900 °C (1470–1650 °F) |
As required |
Air cool |
Note: Over-aging may reduce ductility; process parameters should be validated against actual part geometry and service requirements.
Due to its high work-hardening rate and abrasive carbide content, Alloy 713C is difficult to machine. Recommended practices include:
Use sharp, positive-rake cutting tools (carbide or ceramic).
Rigid machine setup with minimal overhang.
Low cutting speeds and adequate coolant flow.
Final machining is best performed after precipitation heat treatment.
Alloy 713C is considered not weldable by conventional fusion welding processes. Limited success has been reported when joining 713C to more weldable alloys (e.g., Inconel 625 or Hastelloy X) in low-stress, thin-section applications using gas tungsten arc welding (GTAW) with Hastelloy W or Inconel 92 filler metal. Welding is not recommended for structural or load-bearing joints without rigorous procedure qualification.
