Alloy C276,Hastelloy C276 Forgings,UNS N10276,E FORU

British Specs:，American Specs:AMS 5750 ASTM B462 ASTM B564 ASTM B574 ASTM B575 ASTM B622 ASTM B626 (Tube *) ASTM B619 ASTM B775，German Specs:WS 2.4819

### **Product Datasheet: Alloy C-276 / Hastelloy C-276 Forgings (UNS N10276)** **Alloy C-276** (commercially known as **Hastelloy C-276**) forgings represent the premium product form of this nickel-molybdenum-chromium superalloy, offering superior mechanical properties and structural integrity for critical applications. The forging process enhances the alloy's inherent characteristics, providing optimized grain structure, improved toughness, and elimination of internal defects for demanding service conditions in corrosive and high-stress environments. --- #### **1. Chemical Composition** The chemical composition of Hastelloy C-276 forgings is precisely controlled to ensure consistent performance: | Element | Content (%) | |:---|:---| | **Nickel (Ni)** | Balance | | **Molybdenum (Mo)** | 15.0 - 17.0 | | **Chromium (Cr)** | 14.5 - 16.5 | | **Iron (Fe)** | 4.0 - 7.0 | | **Tungsten (W)** | 3.0 - 4.5 | | **Cobalt (Co)** | 2.5 max | | **Manganese (Mn)** | 1.0 max | | **Vanadium (V)** | 0.35 max | | **Silicon (Si)** | 0.08 max | | **Carbon (C)** | 0.01 max | | **Phosphorus (P)** | 0.025 max | | **Sulfur (S)** | 0.01 max | *Note: The carefully balanced composition provides exceptional resistance to both oxidizing and reducing media, while the low carbon and silicon content ensures optimal corrosion resistance in the heat-affected zone of welded components.* --- #### **2. Physical Properties** Hastelloy C-276 forgings exhibit consistent physical properties: | Property | Value | |:---|:---| | **Density** | 8.89 g/cm³ (0.321 lb/in³) | | **Melting Range** | 1325 - 1370°C (2420 - 2500°F) | | **Coefficient of Thermal Expansion** | 11.2 × 10⁻⁶/°C (20-100°C) | | **Thermal Conductivity** | 10.2 W/m·K (at 100°C) | | **Specific Heat** | 427 J/kg·K (at 100°C) | | **Modulus of Elasticity** | 205 GPa (29.7 × 10⁶ psi) | | **Magnetic Permeability** | <1.001 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Annealed Condition per ASTM B564):** | Property | Value | |:---|:---| | **Tensile Strength** | 790 MPa (115 ksi) min | | **Yield Strength (0.2% Offset)** | 415 MPa (60 ksi) min | | **Elongation** | 55% min | | **Reduction of Area** | 65% min | | **Hardness** | 90 HRB max | | **Impact Strength (Charpy V-Notch)** | 100 J min | **Elevated Temperature Properties:** - **Service Temperature:** Up to 1090°C (2000°F) - **Creep Strength:** 240 MPa at 540°C (1000°F) - **Stress Rupture:** 1000 hours at 620°C (1150°F) under 170 MPa stress --- #### **4. Product Specifications** **Available Forging Types:** - **Open Die Forgings:** Large components up to 5000 kg - **Closed Die Forgings:** Precision shapes with minimal machining - **Ring Rolled Forgings:** Seamless rings up to 4000 mm diameter - **Custom Shapes:** Engineered to customer specifications **Size Capabilities:** - **Weight Range:** 1 kg to 5000 kg - **Cross Sections:** Up to 1000 mm - **Lengths:** Up to 6000 mm - **Complexity:** Simple to highly complex geometries --- #### **5. Product Applications** **Chemical Processing Industry:** - **Reactor Parts:** Agitators, mixing elements, vessel heads - **Pump Components:** Casings, impellers, shafts - **Valve Bodies:** For corrosive service applications - **High-Pressure Vessels:** Closures, covers, and nozzles - **Heat Exchanger Components:** Tube sheets, baffles, headers **Oil & Gas Industry:** - **Wellhead Components:** Christmas tree bodies, valve bodies - **Downhole Tools:** Drill collars, heavy-weight drill pipe - **Subsea Equipment:** Manifold blocks, connector bodies - **Valve Components:** Gates, globes, check valves - **Sour Service Applications:** H₂S resistant components **Pollution Control:** - **Scrubber Components:** Tower sections, support beams - **Flue Gas Systems:** Dampers, fan components - **Waste Treatment:** Mixer shafts, agitator arms - **Stack Liners:** Support rings and structural elements **Power Generation:** - **Turbine Components:** Blades, disks, shafts - **Generator Parts:** Rotor elements, end bells - **Nuclear Components:** Control rod mechanisms, support structures - **Heat Exchanger Parts:** Tube sheets, headers, support plates --- #### **6. International Standards** **Material Standards:** - **UNS N10276**: Unified Numbering System designation - **ASTM B564**: Standard Specification for Nickel Alloy Forgings - **ASME SB564**: ASME Boiler and Pressure Vessel Code - **DIN 2.4819**: German Industrial Standard - **EN 10095**: NiMo16Cr15W (European Standard) **Industry Specifications:** - **NACE MR0175/ISO 15156**: For sour service applications - **API 6A**: Wellhead and Christmas Tree Equipment - **API 20B**: Open Die Forgings for Petroleum Industry - **PED 2014/68/EU**: Pressure Equipment Directive **Quality Standards:** - **ASTM A388**: Ultrasonic Examination of Heavy Steel Forgings - **ASTM E165**: Liquid Penetrant Examination - **ASTM E709**: Magnetic Particle Examination - **ISO 9001**: Quality Management Systems --- #### **7. Forging Process Advantages** **Metallurgical Benefits:** - **Refined Grain Structure:** Superior to cast or machined components - **Improved Density:** Elimination of porosity and voids - **Enhanced Toughness:** Superior impact and fatigue resistance - **Optimal Grain Flow:** Contoured to part geometry for maximum strength **Quality Enhancements:** - **Homogeneous Structure:** Consistent properties throughout - **Reduced Defects:** Minimal internal and surface imperfections - **Better Fatigue Life:** Superior resistance to cyclic loading - **Improved Reliability:** Proven performance in critical applications --- #### **8. Heat Treatment** **Solution Annealing:** - **Temperature Range:** 1120-1175°C (2050-2150°F) - **Cooling Method:** Rapid water quench or fast air cool - **Purpose:** To dissolve precipitated phases and restore corrosion resistance **Special Considerations:** - **Stress Relieving:** Not recommended due to potential corrosion issues - **Aging Treatment:** Not applicable for this alloy - **Quenching Rate:** Critical for maintaining corrosion resistance --- #### **9. Corrosion Resistance** **Excellent Performance In:** - **Hydrochloric Acid:** All concentrations and temperatures - **Sulfuric Acid:** Wide concentration range up to 70% - **Phosphoric Acid:** All concentrations and temperatures - **Chloride Solutions:** Superior pitting and crevice corrosion resistance - **Wet Chlorine Gas:** Outstanding performance - **Organic Acids:** Formic, acetic, and other organic acids **Corrosion Performance Data:** - **Critical Pitting Temperature:** >85°C - **Critical Crevice Temperature:** >65°C - **Pitting Resistance Equivalent Number (PREN):** ~69 - **General Corrosion Rate:** <0.1 mm/year in most aggressive media --- #### **10. Machining & Fabrication** **Machining Characteristics:** - **Machinability Rating:** 40-50% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Parameters:** Moderate speeds with positive rake angles - **Coolant Requirements:** Essential for optimum results **Welding Capabilities:** - **Recommended Processes:** GTAW, GMAW, SMAW - **Filler Metals:** ERNiCrMo-4 - **Preheat/Interpass:** Generally not required - **Post-Weld Heat Treatment:** Usually not necessary --- #### **11. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness, impact tests - **Non-Destructive Testing:** UT, MT, PT, RT as required - **Macro/Micro Examination:** Grain structure verification - **Dimensional Inspection:** To drawing specifications **Quality Documentation:** - **Material Certificates:** EN 10204 3.1/3.2 - **Process Documentation:** Complete manufacturing records - **Heat Treatment Charts:** Certified temperature records - **Final Inspection Reports:** Comprehensive quality verification --- #### **12. Key Advantages** * **Superior Mechanical Properties:** Enhanced strength and toughness through forging process * **Exceptional Corrosion Resistance:** Outstanding performance in aggressive environments * **Structural Integrity:** Optimized grain flow for maximum reliability * **Custom Geometries:** Capability to produce complex shapes * **Industry Compliance:** Meets major international standards * **Proven Performance:** Extensive track record in critical applications * **Quality Assurance:** Comprehensive testing and certification * **Technical Support:** Engineering expertise for optimal design Hastelloy C-276 forgings provide the ultimate material solution for critical components requiring the highest levels of mechanical strength, corrosion resistance, and structural reliability in demanding chemical processing, oil & gas, pollution control, and power generation applications worldwide.

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 2036 gallon liquid totes Special package is available on request.