Gnee Steel is a professional manufacturer of Inconel 718 and Inconel 713c. Gnee Steel's 718 products are packaged using various methods: steel strapping: pipes with an outer diameter not exceeding 3 inches are typically bundled together with polypropylene film to prevent rusting during sea transport, then secured with steel straps; wooden crates/crates: pipes are usually packaged in wooden crates or crates for protection during transport, especially for longer or larger diameter pipes; seaworthy export packaging: suppliers typically use standard seaworthy export packaging methods, which may include various materials and techniques to protect the pipes during transport; and tarpaulin packaging: to prevent rainwater, seawater, etc., from seeping into the export wooden crate packaging during transport. Gnee Steel also specializes in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy fields, and customized alloy material solutions can be provided according to customer needs. For alloy material price inquiries or to obtain customized alloy material solutions, please feel free to contact us at ss@gneesteel.com for a quote.
What are the differences between Inconel 713C and Inconel 718?
What are the differences between Inconel 713C and Inconel 718?
Inconel 713C and 718 are nickel-based superalloys with different optimized applications: 713C is a cast alloy suitable for extreme high-temperature environments (up to 1800°F/980°C) and has excellent oxidation resistance, while 718 is an age-hardening, weldable alloy optimized for high strength and creep resistance at lower temperatures (~1300°F/700°C).
What are the disadvantages of Inconel 718?
Disadvantages and alternatives of Inconel 718
While Inconel 718 boasts excellent mechanical and corrosion resistance properties, it also has some drawbacks: High cost: Due to its complex manufacturing process, Inconel 718 is expensive. Difficult to process: Its high hardness makes material removal difficult and accelerates tool wear.
Inconel 713C is a nickel-chromium-molybdenum superalloy suitable for extreme temperatures (up to 1500°F/816°C). Its high chromium, molybdenum, and aluminum content gives it higher strength than other nickel-based superalloys, resulting in improved oxidation resistance and thermal stability. This makes it an ideal material for applications such as gas turbine blades, exhaust nozzles, and rocket engines.
Inconel 718 is a nickel-chromium-molybdenum superalloy primarily used in low-temperature environments. Its high chromium, aluminum, niobium, titanium, and molybdenum content provides excellent creep resistance. This makes it an ideal material for applications such as turbocharger rotors, fasteners, turbine impellers, and bolts.
Chemical composition comparison of inconel 718 and inconel 713c Alloy
| Element | Inconel 718 Typical (%) | Inconel 713C Typical (%) |
|---|---|---|
| Nickel (Ni) | 50 - 55 | Balance |
| Chromium (Cr) | 17 - 21 | 12.0 - 14.0 |
| Molybdenum (Mo) | 2.8 - 3.3 | 3.8 - 5.2 |
| Niobium (Nb) | 4.75 - 5.5 | 1.8 - 2.8 |
| Aluminum (Al) | 0.2 - 0.8 | 5.5 - 6.4 |
| Titanium (Ti) | 0.65 - 1.15 | 0.4 - 1.0 |
| Carbon (C) | ≤ 0.08 | 0.08 - 0.20 |
| Zirconium (Zr) | - | 0.05 - 0.15 |
| Boron (B) | ≤ 0.006 | 0.005 - 0.015 |
Comparison of mechanical properties and temperature resistance of Alloy 718 and Alloy 713c
| Performance Metric | Inconel 718 (Forged + Aged) | Inconel 713C (Cast + Aged) |
|---|---|---|
| Room Temperature Tensile Strength | ≥ 1275 MPa | ~ 895 MPa |
| Room Temperature Yield Strength | ≥ 1035 MPa | ~ 760 MPa |
| Room Temperature Elongation | ≥ 12% | ~ 6% |
| Maximum Recommended Use Temperature | ~ 950°C | ~ 950°C |
| Rupture Strength at 950°C for 100 hours | (Data from clipboard) | ~ 125 MPa |
| Thermal Fatigue Resistance | Excellent | Outstanding |
| Impact Toughness | Good | Relatively low |
Comparison of creep rupture strength between Inconel 718 and 713C in the temperature range of 650°C-1000°C
Comparison of Machining and Welding Capabilities of Inconel 718 and 713C Alloys
| Process / Property | Inconel 718 | Inconel 713C |
|---|---|---|
| Manufacturing Process | Forging, rolling, extrusion, machining. Suitable for producing billets of various specifications and parts with simple shapes. | Investment precision casting. Can be cast into nearly any complex shape (e.g., hollow cooled blades), near-net shape forming, with high material utilization. |
| Weldability | Excellent for a precipitation-hardening alloy, can be welded using various methods, requires aging treatment after welding. | Very poor, generally considered unweldable. High aluminum content makes it extremely prone to hot cracking during welding; repair typically requires brazing or special processes. |
| Machinability | Difficult to machine, but machinable. | Extremely difficult to machine. High hardness and wear resistance; typically only necessary grinding, polishing, and drilling are performed. |
| Heat Treatment | Solution treatment + double aging. Complex but mature process. | Usually homogenization treatment + aging after casting to dissolve harmful phases and precipitate strengthening phases. |
Comparison of typical application areas of Inconel 718 and 713C alloys
| Sector / Field | Inconel 718 Typical Components | Inconel 713C Typical Components | Selection Basis |
|---|---|---|---|
| Aerospace Engines | Turbine discs, compressor discs, casings, shafts, fasteners. | Turbine guide vanes and blades (especially high-pressure turbine blades). | 718: For rotating discs and structural components subjected to high centrifugal stress. 713C: For front-end or rotating blades exposed to the highest gas temperatures and with complex shapes. |
| Gas Turbines | Turbine discs, combustion chamber components, bolts. | Turbine blades and guide vanes. | Similar to aerospace engines, selection depends on temperature and stress levels. |
| Power Generation Turbines | Shafts, flanges, valves. | High-temperature turbine blades. | Similar to aerospace engines, selection depends on temperature and stress levels. |
| Industrial & Others | Oil downhole tools, high-temperature molds, high-performance racing components. | Static castings requiring extremely high heat resistance. | 718 is suitable for any component requiring good overall mechanical properties and machinability; 713C is dedicated to the highest-temperature static or low-stress complex parts. |
Inconel 718 and 713C Alloy Cost and Selection Decision Logic
Cost Considerations:
1. Material and Process Costs: The raw material cost per unit weight may be slightly higher for 713C, but the difference is not significant. The main cost difference lies in manufacturing costs: 718 has higher forging and machining costs; 713C has higher precision casting mold costs, but saves a significant amount of machining.
2. Design Complexity Costs: For extremely complex shapes (such as blades with internal cooling channels), casting with 713C is the only economically feasible option. Manufacturing the same part using 718 forging and machining would result in exponentially increasing costs or even make it impossible.
3. Performance and Reliability Costs: At temperatures above approximately 750°C, 718 cannot meet long-term creep requirements; 713C or a similar cast alloy must be used. Using the wrong material will lead to rapid failure.
Inconel 718 and 713C Alloy Cost and Selection Decision Logic
Contact us for comprehensive technical advice to determine whether forged Inconel 718 or cast Inconel 713C is more suitable for your high-temperature components, including design for manufacturability (DFM) recommendations and cost comparisons.
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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