Are you looking for Inconel 713C forgings for high-temperature turbine components? As a Tier 1 high-temperature alloy supplier with over 18 years of experience, Gnee Alloy frequently receives inquiries about 713C forged bars or rings. However, every purchasing manager and engineer must understand a crucial metallurgical fact: Inconel 713C (UNS N07713) is almost never forged.
In this guide, we will explain the technical reasons behind this and show you why AMS 5391 vacuum investment casting is an excellent and industry-standard solution for your project.
Contact our professionals to recommend the right alloy for your project
About Inconel 713C Forging: Why Precision Casting is the Industry Standard
About Inconel 713C Forging: Why Precision Casting is the Industry Standard
Inconel 713C (also known as 713LC or Alloy 713C) is a high-performance nickel-chromium casting superalloy designed for extreme environments, capable of withstanding temperatures up to 982°C (1800°F). While forging is a common method for manufacturing high-integrity, fatigue-resistant parts from other alloys, precision investment casting is the industry standard for Inconel 713C.
What is the hardness of Inconel 713C?
Inconel 713C superalloy with a hardness of 34 HRC, diameter of 60 mm, and length of 200 mm was used as the work material. The microstructure of Inconel 713C is shown in Fig.
1. Overview of Inconel 713C Alloy Materials
| Parameter | Description |
|---|---|
| Material | Inconel 713C |
| UNS Number | N07713 |
| Chinese Equivalent | K413 |
| Material Type | Cast Nickel-based Superalloy |
| Strengthening Mechanism | γ′ precipitation (Ni₃(Al,Ti)) |
| Product Form | Investment casting only (NOT available as wrought bar/tube/plate) |
| Typical Applications | Gas turbine blades, guide vanes, nozzle rings, turbocharger wheels |
| Maximum Service Temperature | ~950°C (1742°F) |
2. Inconel 713C alloy chemical composition (wt %)
| Element | Content (%) | Standard Requirement | Function |
|---|---|---|---|
| Nickel (Ni) | Balance (~70-75) | Balance | Matrix element; high-temperature stability |
| Chromium (Cr) | 11.0 – 14.0 | 11.0 – 14.0 | Oxidation and corrosion resistance |
| Aluminum (Al) | 5.5 – 6.5 | 5.5 – 6.5 | Primary γ′ former – Ni₃(Al,Ti) |
| Molybdenum (Mo) | 3.5 – 5.0 | 3.5 – 5.0 | Solid-solution strengthening; creep resistance |
| Niobium (Nb) | 1.5 – 2.5 | 1.5 – 2.5 | Supplementary strengthening |
| Titanium (Ti) | 0.4 – 1.0 | 0.4 – 1.0 | γ′ strengthening (Ni₃(Al,Ti)) |
| Iron (Fe) | ≤ 2.0 | ≤ 2.0 | Residual element |
| Cobalt (Co) | ≤ 1.0 | ≤ 1.0 | Residual element |
| Carbon (C) | 0.05 – 0.15 | 0.05 – 0.15 | Carbide former; grain boundary strength |
| Boron (B) | 0.005 – 0.015 | 0.005 – 0.015 | Grain boundary strengthener |
| Zirconium (Zr) | 0.05 – 0.15 | 0.05 – 0.15 | Grain boundary strengthener |
| Manganese (Mn) | ≤ 0.20 | ≤ 0.20 | Deoxidizer |
| Silicon (Si) | ≤ 0.50 | ≤ 0.50 | Deoxidizer |
Click to download the Inconel 713C alloy PDF file now
Inconel 713C Alloy Processing Guide
3. Inconel 713C Alloy Casting Processing
| Process | Parameter/Requirement | Notes |
|---|---|---|
| Casting Method | Investment casting (lost wax) | Only feasible forming method |
| Casting Temperature | ~1400-1450°C | Pouring temperature |
| Minimum Wall Thickness | 1.0 – 2.0 mm | Depends on casting size |
| Dimensional Tolerance | CT7 – CT9 | Investment casting tolerance |
| Surface Roughness (As-Cast) | Ra 3.2 – 6.3 µm | Depends on mold quality |
| Castability | Excellent | Good fluidity |
Inconel 713C Forgings
4. Why is precision casting key to the manufacture of Inconel 713C?
1. High γ' phase volume fraction (brittleness): Inconel 713C's formulation contains a large number of precipitating elements, particularly aluminum (Al) and titanium (Ti), which form numerous γ' phase precipitates. These elements give the alloy extremely high strength, but also make the material extremely difficult to forge because it is relatively brittle compared to malleable alloys like Inconel 718.
2. Near-net-shape forming, suitable for complex geometries: Turbine impellers and blades require complex thin-walled geometries, and sometimes intricate internal cooling channels. Precision casting can produce these complex shapes with extremely high precision (±0.005 inches per inch), thus avoiding extensive and costly machining of this difficult-to-machine material.
3. Superior Creep Resistance Compared to Forging: Cast Inconel 713C alloys, especially those with equiaxed or directionally solidified structures, exhibit superior creep resistance (the ability to resist deformation at high temperatures over long periods) compared to their forged counterparts.
4. Optimized Vacuum Casting Technology: Casting processes have historically been plagued by porosity issues, but modern vacuum investment casting (or "lost-wax casting") has solved this problem. It prevents oxide contamination and produces clean, high-density parts suitable for aerospace applications.
Click to view our professional certificates for Inconel 713C alloy
5. Comparison: Forged 718 vs. Cast 713C
| Property | Inconel 718 (Wrought/Forged) | Inconel 713C (Cast) |
| Max Service Temp | 1200°F (650°C) | 1800°F (982°C) |
| Manufacturing Form | Forged Bars, Rings, Sheets | Vacuum Investment Casting |
| Standard Spec | AMS 5662 | AMS 5391 |
| Primary Use | Structural parts, Disks | Turbine Blades, Nozzles, Rotors |
6. Why choose to partner with Gnee Alloy, a Tier 1 high-temperature alloy supplier?
When you source from Gnee Alloy, you're not just buying metal; you're also gaining a partner in nickel-based alloys.
✅️Engineering Support: We help you transition from unfeasible "forging" specs to optimized high-yield casting solutions.
✅️Full Traceability: Every shipment includes a Full Traceability MTC 3.1, verified against global OEM standards.
✅️Global Logistics: Our supply chain ensures that your AMS 5391 compliant master alloys reach your foundry on time, anywhere in the world.
Gnee Alloy inconel 713C Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Alloy 713C Alloy Product Packing
Contact us for the latest export price quote for 713C Alloy
FAQ
Q: If I can't forge 713C, can I at least get it in a rolled bar form?
A: No. Because it cannot be hot-worked, 713C is typically supplied as VIM-melted master alloy sticks for remelting. If you need a "bar" for machining, it must be cast-to-size or machined from a cast ingot.
Q: What is the alternative if I absolutely must have a forged nickel part for 1800°F?
A: There is a trade-off. You might consider wrought alloys like Inconel 617 or Haynes 230, but they will not match the creep-rupture strength of a cast Inconel 713C component.
Q: Does Inconel 713C require post-cast heat treatment?
A: Most 713C castings are used in the as-cast condition, though some applications utilize a stabilization heat treatment to optimize the gamma-prime distribution.
