19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES

19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES Product Information -:- For detailed product information, please contact sales. -: 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES Synonyms -:- For detailed product information, please contact sales. -:

19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: 19Cr-18Co-4Mo-3Ti-3Al-B Nickel-Based Superalloy for Turbine Components** ## **1. Overview** **19Cr-18Co-4Mo-3Ti-3Al-B** represents a **high-strength, γ'-strengthened nickel-based superalloy** specifically engineered for **critical rotating and static components** in advanced gas turbine engines. This alloy belongs to the class of **precipitation-hardened, wrought/forged superalloys** with balanced composition for **exceptional high-temperature capability, oxidation resistance, and thermo-mechanical fatigue resistance**. With significant chromium content (19%) for corrosion protection and optimized cobalt-molybdenum-aluminum-titanium ratios for precipitation strengthening, it is designed for service in the **750-950°C (1382-1742°F)** temperature range. The alloy exhibits excellent **castability for investment casting of complex blade geometries** and **superior forgeability for disk and shaft applications**, making it a versatile material for both cast turbine blades and forged rotor components in modern aerospace and industrial turbines. ## **2. International Standards & Specifications** This advanced superalloy is typically governed by specialized aerospace material specifications from major engine manufacturers. * **Primary Specifications:** * **AMS 5708 / AMS 5709:** Aerospace Material Specifications for nickel alloy forgings and bars (similar to Inconel 718 derivatives, though this composition is more advanced) * **AMS 5662 / AMS 5663:** For nickel alloy bars, forgings, and rings for high-temperature service * **OEM Proprietary Specifications:** Major engine manufacturers (GE Aviation, Pratt & Whitney, Rolls-Royce, Safran) maintain proprietary specifications for such advanced alloys (e.g., GE's René series, Pratt & Whitney's PWA alloys) * **International Equivalents:** * **European:** May correspond to specialized grades in **EN 10095** (Heat-resisting steels and nickel alloys) or proprietary alloys from European manufacturers * **Russian:** Similar to **ЭП741НП (EP741NP)** or **ВЖ175 (VZh175)** class alloys * **Japanese:** May align with **JIS H4655** (Nickel alloy castings) or NIMS-developed alloys * **Related Commercial Alloys:** Shares characteristics with **Waspaloy**, **Udimet 720**, **René 41**, and **IN-738** but with optimized chromium and cobalt balance ## **3. Chemical Composition (Weight %, Typical)** | Element | Composition Range (%) | Function & Benefit | |---------|----------------------|-------------------| | **Nickel (Ni)** | Balance (~53-57%) | Austenitic (γ) matrix, provides corrosion resistance and stability | | **Chromium (Cr)** | 18.5-19.5 | **Primary oxidation/hot-corrosion resistance**, forms protective Cr₂O₃ scale | | **Cobalt (Co)** | 17.5-18.5 | **Solid-solution strengthener**, reduces γ' solvus temperature, improves high-temperature strength | | **Molybdenum (Mo)** | 3.8-4.2 | **Powerful solid-solution strengthener**, enhances creep resistance, reduces diffusivity | | **Aluminum (Al)** | 2.8-3.2 | **Primary γ' former (Ni₃Al)**, precipitation strengthening, oxidation resistance via Al₂O₃ | | **Titanium (Ti)** | 2.8-3.2 | **γ' former (Ni₃Ti)**, increases γ' volume fraction, works synergistically with Al | | **Tungsten (W)** | (May be present, 1-3%) | Additional solid-solution strengthening, often included in such alloys | | **Niobium (Nb)** | (May be present, 0.5-2%) | γ' and γ'' former, enhances precipitation strengthening | | **Tantalum (Ta)** | (May be present, 0.5-2%) | Refractory element, improves high-temperature strength | | **Carbon (C)** | 0.03-0.08 | Forms MC carbides for grain boundary strengthening | | **Boron (B)** | 0.005-0.015 | **Grain boundary strengthener**, improves creep rupture life | | **Zirconium (Zr)** | 0.03-0.08 | Trace element, enhances grain boundary properties | | **Iron (Fe)** | ≤1.0 | Residual element, kept low for microstructural stability | ## **4. Typical Physical & Mechanical Properties** ### **For Castings (Investment Cast):** * **Heat Treatment:** Solution treatment 1150-1180°C + Aging 850-900°C * **Room Temperature Properties:** * Tensile Strength: 1100-1300 MPa * Yield Strength (0.2%): 950-1150 MPa * Elongation: 8-15% * Hardness: 34-40 HRC * **Elevated Temperature (850°C):** * Stress Rupture Life (310 MPa): >200 hours * Creep Strength (0.2% in 1000h): >180 MPa * **Physical Properties:** * Density: 8.1-8.3 g/cm³ * Melting Range: 1330-1380°C * Thermal Conductivity: 15-18 W/m·K (at 800°C) * CTE: 14.0-15.0 × 10⁻⁶/°C (20-800°C) ### **For Forgings:** * **Heat Treatment:** Solution treatment 1080-1120°C + Aging 750-800°C * **Room Temperature Properties:** * Tensile Strength: 1250-1450 MPa * Yield Strength (0.2%): 1050-1250 MPa * Elongation: 12-20% * Hardness: 36-42 HRC * **Elevated Temperature (800°C):** * Fatigue Strength (10⁷ cycles): 350-450 MPa * Creep Strength (0.2% in 1000h): >200 MPa ## **5. Product Application** * **Aerospace Gas Turbines:** * **High-Pressure Turbine (HPT) Blades** (cast) * **Compressor Disks** (forged) for later stages * **Turbine Disks and Shafts** (forged) * **Blisks (Bladed Disks)** for military engines * **Industrial Gas Turbines:** * **First and Second Stage Turbine Blades** * **Turbine Wheels and Disks** * **Combustion Chamber Components** * **Aero-derivative Turbines:** * **Power Generation Turbine Components** * **Marine Propulsion System Parts** * **Special Applications:** * **Rocket Engine Turbopump Components** * **Nuclear Reactor Core Components** ## **6. Key Features & Advantages** * **Dual Processing Capability:** Can be processed as both high-quality castings and high-strength forgings * **Excellent Oxidation Resistance:** High chromium content (19%) provides superior protection in harsh environments * **Balanced Mechanical Properties:** Optimal combination of strength, ductility, and toughness * **Good Microstructural Stability:** Resists phase transformation during long-term high-temperature exposure * **Superior Forgeability:** Better hot workability compared to many advanced superalloys * **Weldability:** Can be welded using specialized techniques and filler materials * **Controlled Grain Structure:** Can achieve uniform fine grain for forgings or directionally solidified structure for castings ## **7. Manufacturing & Processing** * **Melting Practice:** Requires **VIM (Vacuum Induction Melting)** + **VAR (Vacuum Arc Remelting)** or **ESR (Electroslag Remelting)** for premium quality * **Casting Process:** **Investment casting** with potential for **directional solidification (DS)** for enhanced properties * **Forging Process:** **Isothermal forging** or **hot die forging** for complex geometries * **Heat Treatment:** Multi-step solution and aging treatments tailored for specific applications * **Machinability:** Challenging; requires specialized tooling and cooling techniques * **Surface Treatment:** Often coated with **MCrAlY** or **thermal barrier coatings (TBCs)** for enhanced performance ## **8. Design Considerations** * **High-Temperature Capability:** Suitable for components requiring long-term service at 800-900°C * **Corrosion Resistance:** Excellent resistance to oxidation and hot corrosion in sulfur-containing environments * **Thermal Fatigue Resistance:** Good resistance to thermal cycling due to balanced thermal expansion properties * **Cost Effectiveness:** More economical than single-crystal superalloys while offering substantial performance benefits * **Repairability:** Components can often be repaired/rejuvenated through specialized welding and heat treatment processes **Summary:** The 19Cr-18Co-4Mo-3Ti-3Al-B nickel-based superalloy represents an advanced engineering material optimized for demanding gas turbine applications requiring a balance of high-temperature strength, environmental resistance, and manufacturing flexibility. Its unique composition allows for both casting and forging processing routes, making it a versatile choice for various turbine components from blades to disks. The alloy's excellent oxidation resistance coupled with good mechanical properties positions it as a reliable material for next-generation turbine engines seeking improved efficiency and durability. -:- For detailed product information, please contact sales. -: 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES Specification Dimensions Size： Diameter 20-1000 mm Length <7022 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES Properties -:- For detailed product information, please contact sales. -:

Applications of 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES -:- For detailed product information, please contact sales. -: Chemical Identifiers 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES -:- For detailed product information, please contact sales. -:

Packing of 19Cr-18Co-4Mo-3Ti-3Al-B NICKEL BASED SUPERALLOY CASTINGS AND FORGINGS FOR GAS TURBINE BLADES -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: 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 3493 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition