Alloy 115,Nimonic 115 Bar(Round bar, Flat bar),,E FORU

British Specs:BS HR4，American Specs:，German Specs: WS 2.4636,AFNOR NCK 15ATD

### **Product Data Sheet: Alloy 115 / Nimonic 115 Bar (Round Bar, Flat Bar) (UNS N07115)** **Overview** **Alloy 115** (commercially known as **Nimonic 115**) is an advanced precipitation-hardenable nickel-chromium-cobalt superalloy designed for extreme temperature service. In the form of **round bar and flat bar**, this material delivers **exceptional creep strength, outstanding oxidation resistance, and superior structural integrity** at temperatures up to 1000°C (1830°F). Nimonic 115 bar products are manufactured to provide reliable performance in high-stress applications where dimensional stability, mechanical reliability, and long-term performance under extreme thermal and stress conditions are critical. Both round and flat bar forms offer excellent machinability and fabrication versatility while maintaining the alloy's superior high-temperature characteristics. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Austenitic matrix; provides corrosion resistance and toughness | | **Chromium (Cr)** | 14.0 - 15.7 | Confers oxidation and hot corrosion resistance | | **Cobalt (Co)** | 12.0 - 15.0 | Solid solution strengthener; enhances high-temperature strength | | **Molybdenum (Mo)** | 3.3 - 4.3 | Provides solid solution strengthening and creep resistance | | **Aluminum (Al)** | 4.8 - 5.5 | Primary precipitation hardener (forms γ' phase, Ni₃Al) | | **Titanium (Ti)** | 3.5 - 4.2 | Secondary precipitation hardener; contributes to γ' formation | | **Carbon (C)** | 0.12 - 0.20 | Forms carbides for grain boundary strength | | **Boron (B)** | 0.010 - 0.020 | Strengthens grain boundaries and improves creep life | | **Zirconium (Zr)** | 0.03 - 0.10 | Enhances creep rupture properties | | **Manganese (Mn)** | 0.50 max | Controls sulfur content | | **Silicon (Si)** | 0.50 max | Improves oxidation resistance | | **Iron (Fe)** | 1.0 max | Residual element | --- #### **2. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.05 g/cm³ (0.291 lb/in³) | | **Melting Range** | 1330 - 1360°C (2425 - 2480°F) | | **Specific Heat** | 460 J/kg·K (0.110 Btu/lb·°F) @ 20°C | | **Thermal Conductivity** | 12.0 W/m·K (83.2 Btu·in/hr·ft²·°F) @ 20°C | | **Mean Coefficient of Thermal Expansion** | 13.2 × 10⁻⁶/°C (20-100°C) | | | 16.8 × 10⁻⁶/°C (20-800°C) | | **Electrical Resistivity** | 1.25 μΩ·m @ 20°C | | **Modulus of Elasticity** | 215 GPa (31.2 × 10⁶ psi) @ 20°C | | | 160 GPa (23.2 × 10⁶ psi) @ 800°C | --- #### **3. Mechanical Properties** **Typical Room Temperature Properties (Heat Treated Condition)** * **Tensile Strength:** 1100-1300 MPa (160-188 ksi) * **Yield Strength (0.2% Offset):** 800-950 MPa (116-138 ksi) * **Elongation:** 8-15% * **Reduction of Area:** 12-20% **Elevated Temperature Performance** * **Stress Rupture Strength (1000 hours):** * **850°C (1560°F):** ~180 MPa (~26.1 ksi) * **950°C (1740°F):** ~80 MPa (~11.6 ksi) * **1000°C (1830°F):** ~45 MPa (~6.5 ksi) --- #### **4. Product Forms & Specifications** **Round Bar:** * **Diameter Range:** 5mm to 300mm (0.2" to 12") * **Standard Lengths:** 3-6 meters (10-20 feet) * **Tolerance:** h11 for precision applications **Flat Bar:** * **Thickness Range:** 3mm to 150mm (0.12" to 6") * **Width Range:** 10mm to 300mm (0.4" to 12") * **Standard Lengths:** 3-6 meters (10-20 feet) **Surface Condition:** * Centerless ground (round bar) * Turned and polished * Hot-rolled, annealed, and pickled * Machined surfaces available --- #### **5. Key Characteristics** * **Enhanced Temperature Capability:** Superior performance up to 1000°C * **Excellent Creep Strength:** Outstanding stress rupture properties * **Superior Oxidation Resistance:** Extended service life in oxidizing environments * **Optimized Machinability:** Can be readily machined in solution-annealed condition * **Microstructural Stability:** Maintains properties during long-term exposure * **Good Thermal Fatigue Resistance:** Performs well under thermal cycling conditions * **Consistent Grain Structure:** Uniform properties throughout cross-section * **Good Weldability:** Can be welded using appropriate procedures and filler materials --- #### **6. Product Applications** Nimonic 115 bar products are used for critical components in extreme temperature environments: **Round Bar Applications:** * **Aerospace & Gas Turbine Engines:** * **High-pressure turbine blades** * **Turbine vanes and nozzles** * **Rotor discs and spacers** * **Shafts and spindle components** * **Fasteners and bolting** * **Power Generation:** * **Industrial gas turbine blades** * **Turbine discs and shafts** * **High-temperature valve stems** * **Rotor assemblies** **Flat Bar Applications:** * **Structural supports and brackets** * **Wear plates and guides** * **Fabrication components** * **Heat treatment fixtures** * **Tooling and die components** --- #### **7. International Standards** | Standard Type | Standard Number | Description | | :--- | :--- | :--- | | **Unified Numbering System** | **UNS N07115** | All product forms | | **Aerospace (SAE/AMS)** | **AMS 5801** | Bar, Forgings, and Rings (Solution heat treated, precipitation-hardenable) | | **ASTM** | **ASTM B637** | Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock | | **British Standard** | **BS HR 7** | Bar Specifications | | **European** | **EN 10302** | Nickel and cobalt alloys | | **Werkstoff Nr.** | **2.4958** | Material number | | **ISO** | **ISO 9726** | Nickel alloy bars for aerospace applications | --- #### **8. Quality Assurance** **Testing & Certification:** * Chemical analysis certification * Mechanical properties testing * Ultrasonic testing per ASTM A388 * Grain size assessment * Macro-etch testing * Dye penetrant inspection **Certification:** * Material Test Certificate 3.1 per EN 10204 * Full traceability to melt heat number * Heat treatment compliance records * Dimensional inspection reports --- **Summary** **Alloy 115 Bar (Nimonic 115, UNS N07115)** in both round and flat forms provides an optimal combination of machinability and extreme temperature performance for critical rotating, structural, and fabricated components. Its enhanced creep strength and oxidation resistance at temperatures up to 1000°C make it particularly suitable for high-pressure turbine components and other critically stressed applications in advanced gas turbine engines and power generation equipment. The bar forms offer excellent dimensional consistency and metallurgical quality, enabling precision machining and fabrication of complex components while maintaining the superior properties that make Nimonic 115 a preferred choice for the most demanding high-temperature applications. Compliance with international standards including AMS 5801, ASTM B637, and BS HR 7 ensures reliable performance in critical aerospace and industrial applications where component reliability and extended service life are paramount.

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 2146 gallon liquid totes Special package is available on request.