Alloy 700,Inconel 700,，EFORU

### **Alloy 700 / INCONEL® 700 (UNS N07700) - Technical Datasheet** --- #### **1. Overview** **INCONEL® 700** is a nickel-chromium-cobalt precipitation-hardenable superalloy designed for exceptional high-temperature strength and oxidation resistance. Developed primarily for gas turbine engine components, this alloy maintains excellent mechanical properties at temperatures up to 980°C (1800°F) and offers outstanding resistance to creep and thermal fatigue in demanding aerospace and industrial applications. --- #### **2. Chemical Composition (Weight %)** The composition is optimized for high-temperature performance and precipitation hardening. | Element | Content (%) | Role & Benefit | |---------|-------------|----------------| | **Nickel (Ni)** | Balance | Austenitic matrix providing high-temperature strength | | **Chromium (Cr)** | 14.0 - 17.0 | Oxidation and hot corrosion resistance | | **Cobalt (Co)** | 20.0 - 25.0 | Solid solution strengthening and stability | | **Molybdenum (Mo)** | 3.0 - 5.0 | Enhances strength and creep resistance | | **Titanium (Ti)** | 2.0 - 3.0 | Primary precipitation hardening element (forms γ' - Ni₃Ti) | | **Aluminum (Al)** | 1.5 - 2.5 | Secondary precipitation hardening (forms γ' - Ni₃Al) | | **Iron (Fe)** | 1.0 max | Controlled impurity | | **Manganese (Mn)** | 0.50 max | Deoxidizer and workability agent | | **Silicon (Si)** | 0.50 max | Controlled impurity | | **Carbon (C)** | 0.12 max | Controlled for carbide formation | | **Boron (B)** | 0.006 - 0.015 | Enhances creep strength and grain boundary cohesion | | **Zirconium (Zr)** | 0.02 - 0.08 | Improves stress rupture properties | *Note: "INCONEL" is a registered trademark of Special Metals Corporation* --- #### **3. Physical Properties** The physical properties support extreme high-temperature applications. | Property | Value | |----------|-------| | **Density** | 8.22 g/cm³ (0.297 lb/in³) | | **Melting Point** | 1365-1415°C (2490-2580°F) | | **Specific Heat (20°C)** | 450 J/kg·K | | **Thermal Conductivity** | 12.1 W/m·K (at 20°C) | | **Mean Coefficient of Thermal Expansion** | 13.5 × 10⁻⁶/°C (20-300°C) | | **Electrical Resistivity** | 1.25 μΩ·m | | **Modulus of Elasticity** | 221 GPa (32.0 × 10⁶ psi) | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** Properties vary significantly with heat treatment condition. **Solution Annealed Condition (1150°C/2100°F):** | Property | Value | |----------|-------| | **Tensile Strength** | 860-1030 MPa (125-150 ksi) | | **Yield Strength (0.2% Offset)** | 515-690 MPa (75-100 ksi) | | **Elongation** | 25-35% | | **Hardness** | 25-35 HRC | **Aged Condition (730°C/1350°F for 16 hours):** | Property | Value | |----------|-------| | **Tensile Strength** | 1310-1520 MPa (190-220 ksi) | | **Yield Strength** | 1030-1240 MPa (150-180 ksi) | | **Elongation** | 12-20% | | **Hardness** | 36-42 HRC | **Elevated Temperature Properties (870°C/1600°F):** | Property | Value | |----------|-------| | **Tensile Strength** | 485 MPa (70 ksi) | | **Yield Strength** | 380 MPa (55 ksi) | | **Creep Rupture Strength (1000h)** | 110 MPa (16 ksi) | --- #### **5. Heat Treatment** **Solution Treatment:** 1150°C (2100°F) for 2 hours, rapid cool **Aging Treatment:** 730°C (1350°F) for 16 hours, air cool **Alternative Aging:** 760°C (1400°F) for 16 hours for optimal creep resistance --- #### **6. Product Applications** **INCONEL 700** serves in extreme high-temperature environments: - **Aerospace Industry:** - Gas turbine blades and vanes - Turbine disks and shafts - Afterburner components - Jet engine combustion chambers - **Industrial Gas Turbines:** - Turbine buckets and nozzles - Combustion liners - Hot section components - Turbine seals and rings - **Power Generation:** - High-temperature turbine components - Heat exchanger parts - Advanced power system components - Nuclear reactor components - **Industrial Applications:** - High-temperature fasteners - Heat treatment fixtures - Chemical processing equipment - High-temperature springs --- #### **7. International Standards** The material conforms to various international specifications: | Standard | Specification | |----------|---------------| | **ASTM** | ASTM B637 - Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock | | **UNS** | UNS N07700 | | **AMS** | AMS 5549, AMS 5715 | | **Aerospace** | AMS 5715 (Bar and Forgings) | | **European** | EN 10095 - NW 12 | | **ISO** | ISO 6208 - NiCr15Co15MoTi | --- #### **8. Corrosion Resistance** - **Excellent** oxidation resistance up to 980°C (1800°F) - **Good** resistance to hot corrosion and sulfidation - **Excellent** performance in high-temperature air and steam - **Good** resistance to carburizing atmospheres - **Maintains** strength in prolonged high-temperature exposure - **Excellent** thermal fatigue resistance --- #### **9. Fabrication Characteristics** - **Machining:** Best machined in solution annealed condition - **Welding:** Weldable using GTAW with matching filler metal - **Forming:** Good hot working characteristics - **Forging:** Suitable for hot forging at 1050-1175°C (1920-2150°F) - **Heat Treatment:** Requires precise control of solution and aging parameters --- #### **10. Special Considerations** - **Temperature Capability:** Continuous service to 980°C (1800°F) - **Creep Resistance:** Excellent long-term creep properties - **Thermal Stability:** Resistant to microstructural degradation - **Aging Response:** Can be heat treated for specific property requirements - **High-Temperature Strength:** Maintains strength at elevated temperatures --- #### **11. Summary** **INCONEL® 700 (UNS N07700)** represents a high-performance precipitation-hardenable nickel-based superalloy engineered for the most demanding high-temperature applications. Its sophisticated composition, featuring chromium for oxidation resistance, cobalt for solid solution strengthening, and titanium/aluminum for precipitation hardening, delivers exceptional mechanical properties at temperatures up to 980°C. The alloy's outstanding creep resistance, thermal stability, and high-temperature strength make it indispensable for critical aerospace components, particularly in gas turbine engines and advanced power generation systems. Governed by comprehensive standards including AMS 5715 and ASTM B637, INCONEL 700 continues to be the material of choice for applications where reliability at extreme temperatures is paramount and performance cannot be compromised.

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 1725 gallon liquid totes Special package is available on request.