In the aerospace and power generation industries, the structure of turbine engines is a masterpiece of materials science. Inconel 718 and Inconel 713C are two iconic alloys in this field. Although both belong to the "Inconel" brand, they represent two distinct engineering philosophies: forging emphasizes strength and ductility, while casting prioritizes extremely high heat resistance and creep resistance.
Gnee Alloy, a leading Tier 1 supplier of high-temperature alloys, serves as your one-stop shop for high-temperature alloy sourcing. We provide the metallurgical expertise and certified inventory you need to support your high-performance engine components.
Click to get an Inconel 713C quote
What are the differences between Inconel 713C and Inconel 718?
What are the differences between Inconel 713C and Inconel 718?
Inconel 713C and Inconel 718 are nickel-based superalloys, differing primarily in their application temperature and manufacturing method: Inconel 713C is a cast alloy optimized for higher temperatures (up to 980°C) and exhibits excellent creep resistance; while Inconel 718 is a forged alloy designed to maintain high strength and excellent weldability at temperatures up to 700°C.
What is Inconel 713C?
INCONEL 713C is a nickel-chromium cast alloy which possesses outstanding rupture strength at 1700 F. combined with excellent resistance to thermal fatigue and good castability. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep and fatigue.
1. Overview of Inconel 718 and Inconel 713C Alloy Materials
| Parameter | Inconel 713C | Inconel 718 |
|---|---|---|
| Material Type | Cast Nickel-based Superalloy | Wrought Nickel-based Superalloy |
| UNS Number | UNS N07713 | UNS N07718 |
| Chinese Equivalent | K413 | GH4169 |
| Primary Application | Cast turbine blades, vanes, investment castings | Wrought bars, forgings, fasteners, turbine discs |
| Strengthening Mechanism | γ′ precipitation (Ni₃(Al,Ti)) | γ″ + γ′ precipitation (Ni₃Nb + Ni₃(Al,Ti)) |
| Manufacturing Form | Investment casting only | Wrought (forged / rolled / cold drawn) |
| Maximum Service Temp | ~950°C (1742°F) | ~650 – 700°C (1202-1292°F) |
Key information on Inconel 713C and Inconel 718 alloys
Inconel 718 Forged Alloy
Inconel 718 (UNS N07718) is the world's most widely used high-temperature alloy. Its secret lies in its excellent forging properties and high tensile strength.
Main Applications: Turbine discs, shafts, and high-strength bolts.
Temperature Limits: Up to 1200°F (650°C). Above this temperature, its mechanical properties begin to decline.
Machining: As a forging alloy, it can be forged into large discs or rolled into plates and tubes. Its excellent weldability makes it an ideal material for engine structural frames.
Inconel 713C Cast Alloy
Inconel 713C (UNS N07713) is a precipitation-hardening cast alloy designed specifically for the "hot end" of engines.
Main Applications: Turbine blades, nozzle guide vanes, and integral rotors.
Temperature Limits: Maintains excellent creep resistance at temperatures up to 1800°F (982°C).
Manufacturing process: 713C is almost exclusively used in vacuum investment casting. Its excessive hardness and brittleness make it unsuitable for forging, but its γ′ (γ′) reinforced matrix allows it to remain stable at temperatures close to its melting point.
4. Comparison of chemical composition of Inconel 718 and Inconel 713C (wt%)
| Element | Inconel 713C (Cast) | Inconel 718 (Wrought) | Key Difference |
|---|---|---|---|
| Nickel (Ni) | Balance (~70-75) | 50.0 – 55.0 | 713C much higher Ni |
| Chromium (Cr) | 11.0 – 14.0 | 17.0 – 21.0 | 718 higher Cr |
| Iron (Fe) | ≤ 2.0 | Balance (~18-20) | 718 has much higher Fe |
| Molybdenum (Mo) | 3.5 – 5.0 | 2.80 – 3.30 | 713C higher Mo |
| Niobium (Nb) | 1.5 – 2.5 | 4.75 – 5.50 | 718 much higher Nb |
| Titanium (Ti) | 0.4 – 1.0 | 0.65 – 1.15 | Similar |
| Aluminum (Al) | 5.5 – 6.5 | 0.20 – 0.80 | 713C much higher Al |
| Carbon (C) | 0.05 – 0.15 | ≤ 0.08 | 713C higher |
| Cobalt (Co) | ≤ 1.0 | ≤ 1.00 | Similar |
| Manganese (Mn) | ≤ 0.20 | ≤ 0.35 | – |
| Silicon (Si) | ≤ 0.50 | ≤ 0.35 | – |
| Boron (B) | 0.005 – 0.015 | 0.002 – 0.006 | 713C higher B |
| Zirconium (Zr) | 0.05 – 0.15 | – | 713C unique |
| Copper (Cu) | – | ≤ 0.30 | – |
| Tantalum (Ta) | – | ≤ 0.05 | – |
5. Physical properties of Inconel 718 and Inconel 713C
| Property | Inconel 713C (Cast) | Inconel 718 (Wrought) |
|---|---|---|
| Density | 7.91 g/cm³ | 8.19 g/cm³ |
| Melting Range | 1260 – 1315°C | 1260 – 1336°C |
| Thermal Conductivity (20°C) | 11.2 W/m·K | 11.4 W/m·K |
| Coefficient of Thermal Expansion (20-100°C) | 12.0 × 10⁻⁶/°C | 13.0 × 10⁻⁶/°C |
| Coefficient of Thermal Expansion (20-800°C) | ~14.0 × 10⁻⁶/°C | ~15.5 × 10⁻⁶/°C |
| Specific Heat (20°C) | 450 J/kg·K | 435 J/kg·K |
| Modulus of Elasticity (20°C) | ~205 GPa | ~200 GPa |
| Electrical Resistivity | 1.30 µΩ·m | 1.25 µΩ·m |
| Magnetic Properties | Non-magnetic | Slightly magnetic |
Click to download the Inconel 713C alloy PDF file now
6. Inconel 713C vs. 718 Technology Comparison Matrix
| Performance Metric | Inconel 718 (Wrought) | Inconel 713C (Cast) | Expert Insight |
| Material Form | Bar, Forging, Sheet, Pipe | Master Alloy Stick / Casting | Match the form to your manufacturing. |
| Standard Spec | AMS 5662 / 5663 | AMS 5391 | Know your compliance standards. |
| Max Service Temp | 1200°F (650°C) | 1800°F (982°C) | 713C is for the hot-end core. |
| Weldability | Excellent | Poor (Avoid welding) | 718 is the fabricator's choice. |
| Strengthening | Gamma Double Prime (
γ′′γ′′ ) |
Gamma Prime (
γ′γ′ ) |
713C's phase is more heat-stable. |
7. Recommended Choice Between Inconel 713C and 718
| Requirement Priority | Recommended Alloy |
|---|---|
| Service temperature 800-950°C | Inconel 713C (cast only) |
| Service temperature 650-700°C | Inconel 718 |
| Cast shape required | Inconel 713C |
| Wrought bar / forging required | Inconel 718 |
| Highest room temperature strength | Inconel 718 |
| Highest yield strength | Inconel 718 |
| High ductility / formability | Inconel 718 |
| Turbine blade / vane application | Inconel 713C |
| Turbine disc / fastener application | Inconel 718 |
| Low density | Inconel 713C (7.91 vs 8.19) |
| Corrosion resistance | Inconel 718 |
Why Choose Gnee Alloy, a Nickel-Based Alloy Supplier?
✅️Dual Inventory: We stock both Inconel 718 bars/forgings and Inconel 713C VIM master alloy sticks, allowing you to source for both blades and disks from a single partner.
✅️Full Traceability: Every shipment includes a comprehensive MTC 3.1 Certified report, ensuring 100% metallurgical integrity for aerospace audits.
✅️Factory-Direct Pricing: By bypassing middlemen, we offer Wholesale Prices that optimize your project's ROI without sacrificing material quality.
Gnee Alloy inconel 713C certificate
Contact us now to get the latest export price for 713C in 2026
FAQ
Q: Why can't I use Inconel 718 for turbine blades?
A: At the 1800°F (982°C) temperatures found in turbine hot-ends, Inconel 718 loses its structural strength almost immediately. Inconel 713C is specifically engineered with high Aluminum (6%) content to form a stable matrix that resists the centrifugal loads at these extreme temperatures.
Q: Do you offer custom forging for Inconel 718 disks?
A: Yes. As a trusted nickel alloy consultant, we provide forged 718 blanks to your specific CAD drawings, followed by heat treatment to achieve peak tensile properties.
Q: How do you ensure the purity of 713C master alloys?
A: All our 713C is produced via Vacuum Induction Melting (VIM). We maintain Oxygen and Nitrogen levels below 10ppm, which is critical for the casting yield of complex aerodynamic blades.