Alloy 713C,Inconel 713C,，EFORU

### **Alloy 713C / INCONEL® 713C (UNS N07713) - Technical Datasheet** --- #### **1. Overview** **INCONEL® 713C** is a precipitation-hardenable nickel-chromium alloy specifically developed for investment casting of gas turbine components. This cast superalloy combines excellent high-temperature strength, superior creep resistance, and good oxidation resistance up to 980°C (1800°F). Its optimized composition provides outstanding structural stability in the as-cast condition, making it particularly suitable for complex turbine components that require minimal post-cast processing. --- #### **2. Chemical Composition (Weight %)** The composition is precisely balanced for castability and high-temperature performance. | Element | Content (%) | Role & Benefit | |---------|-------------|----------------| | **Nickel (Ni)** | Balance | Austenitic matrix providing high-temperature strength | | **Chromium (Cr)** | 11.0 - 13.0 | Oxidation and hot corrosion resistance | | **Molybdenum (Mo)** | 4.0 - 5.0 | Solid solution strengthening | | **Niobium (Nb)** | 1.8 - 2.5 | Forms strengthening γ'' phase (Ni₃Nb) | | **Titanium (Ti)** | 0.5 - 1.0 | Enhances precipitation hardening | | **Aluminum (Al)** | 5.5 - 6.5 | Primary precipitation hardening (forms γ' - Ni₃Al) | | **Iron (Fe)** | 1.0 max | Controlled impurity | | **Cobalt (Co)** | 1.0 max | Controlled impurity | | **Zirconium (Zr)** | 0.05 - 0.15 | Improves stress rupture properties | | **Boron (B)** | 0.005 - 0.015 | Enhances creep strength and grain boundary cohesion | | **Carbon (C)** | 0.08 - 0.16 | Controlled for carbide formation and strength | | **Manganese (Mn)** | 0.25 max | Controlled impurity | | **Silicon (Si)** | 0.50 max | Improves castability | *Note: "INCONEL" is a registered trademark of Special Metals Corporation* --- #### **3. Physical Properties** The physical properties support high-temperature turbine applications. | Property | Value | |----------|-------| | **Density** | 7.92 g/cm³ (0.286 lb/in³) | | **Melting Range** | 1260-1340°C (2300-2445°F) | | **Specific Heat (20°C)** | 440 J/kg·K | | **Thermal Conductivity** | 13.5 W/m·K (at 20°C) | | **Mean Coefficient of Thermal Expansion** | 13.8 × 10⁻⁶/°C (20-300°C) | | **Electrical Resistivity** | 1.30 μΩ·m | | **Modulus of Elasticity** | 206 GPa (29.9 × 10⁶ psi) | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** The alloy develops excellent properties in the as-cast and aged condition. **As-Cast Condition:** | Property | Value | |----------|-------| | **Tensile Strength** | 860-1030 MPa (125-150 ksi) | | **Yield Strength (0.2% Offset)** | 690-860 MPa (100-125 ksi) | | **Elongation** | 5-12% | | **Hardness** | 30-38 HRC | **Aged Condition (980°C/1800°F for 4 hours):** | Property | Value | |----------|-------| | **Tensile Strength** | 930-1100 MPa (135-160 ksi) | | **Yield Strength** | 760-930 MPa (110-135 ksi) | | **Elongation** | 4-10% | | **Hardness** | 32-40 HRC | **Elevated Temperature Properties (870°C/1600°F):** | Property | Value | |----------|-------| | **Tensile Strength** | 480 MPa (70 ksi) | | **Yield Strength** | 415 MPa (60 ksi) | | **Stress Rupture (100h)** | 240 MPa (35 ksi) | --- #### **5. Heat Treatment** **Solution Treatment:** Optional - 1120°C (2050°F) for 2 hours, air cool **Aging Treatment:** 980°C (1800°F) for 4 hours, air cool **Stress Relieving:** 870-900°C (1600-1650°F) for 4 hours --- #### **6. Product Applications** **INCONEL 713C** is primarily used in high-temperature turbine applications: - **Aerospace Industry:** - Gas turbine blades and vanes - Turbine wheels and rotors - Nozzle guide vanes - Combustion chamber components - **Industrial Gas Turbines:** - Turbine buckets and nozzles - Power turbine components - Compressor parts - Turbine seals - **Marine Turbines:** - Ship propulsion turbine components - Marine gas turbine parts - Naval turbine applications - **Energy Generation:** - Land-based gas turbine components - Power generation turbine parts - Turbocharger wheels --- #### **7. International Standards** The material conforms to various international specifications: | Standard | Specification | |----------|---------------| | **ASTM** | ASTM A957 - Investment Castings | | **UNS** | UNS N07713 | | **AMS** | AMS 5391 (Investment Castings) | | **Aerospace** | AMS 5392 (Premium Quality Castings) | | **Military** | MIL-I-23011 | | **European** | EN 10295 - NiCr13Mo4Nb | --- #### **8. High-Temperature Properties** - **Excellent** creep resistance at 760-980°C (1400-1800°F) - **Good** oxidation resistance up to 980°C (1800°F) - **Superior** stress rupture properties - **Good** thermal fatigue resistance - **Excellent** microstructural stability - **Good** castability for complex shapes --- #### **9. Fabrication Characteristics** - **Casting:** Excellent investment casting characteristics - **Machining:** Can be machined in heat-treated condition - **Welding:** Limited weldability due to high aluminum content - **Heat Treatment:** Responds well to precipitation aging - **Surface Treatment:** Can be aluminized or coated for enhanced oxidation resistance --- #### **10. Special Considerations** - **Castability:** Specifically designed for investment casting process - **Minimal Machining:** Often used in as-cast or minimally machined condition - **Temperature Capability:** Suitable for service up to 980°C (1800°F) - **Quality Levels:** Available in standard and premium quality grades - **Coating Compatibility:** Excellent substrate for thermal barrier coatings --- #### **11. Summary** **INCONEL® 713C (UNS N07713)** represents a premier cast nickel-based superalloy specifically engineered for gas turbine applications requiring complex geometries and superior high-temperature performance. Its unique composition, featuring high aluminum content for precipitation hardening and optimized levels of niobium and molybdenum for strengthening, delivers exceptional creep resistance and structural stability in the temperature range most critical for turbine operation. The alloy's excellent castability allows for production of intricate cooling passages and complex airfoil shapes, while its ability to develop high strength in the as-cast condition minimizes the need for extensive post-cast processing. Governed by comprehensive standards including AMS 5391 and ASTM specifications, INCONEL 713C continues to be a benchmark material for investment-cast turbine components in aerospace, industrial, and marine applications where reliability at extreme temperatures is essential.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1727 gallon liquid totes Special package is available on request.