Alloy C276,Hastelloy C276 Plate,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 Plate (UNS N10276)** **Alloy C-276** (commercially known as **Hastelloy C-276**) plate is a nickel-molybdenum-chromium superalloy supplied in plate form, offering exceptional corrosion resistance in a wide range of severe environments. This product form is specifically designed for pressure vessels, chemical processing equipment, and structural applications where reliability under aggressive corrosive conditions and mechanical stress is paramount. --- #### **1. Chemical Composition** The chemical composition of Hastelloy C-276 plate is precisely controlled to ensure optimal 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 balanced composition provides exceptional resistance to both oxidizing and reducing media, while the low carbon and silicon content ensures optimal corrosion resistance in welded structures.* --- #### **2. Physical Properties** Hastelloy C-276 plate exhibits 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) | | **Electrical Resistivity** | 1.30 μΩ·m | | **Magnetic Permeability** | <1.001 (essentially non-magnetic) | --- #### **3. Mechanical Properties** **Standard Mechanical Properties (Annealed Condition per ASTM B575):** | Property | Value | |:---|:---| | **Tensile Strength** | 790 MPa (115 ksi) min | | **Yield Strength (0.2% Offset)** | 415 MPa (60 ksi) min | | **Elongation** | 55% min | | **Hardness** | 90 HRB max | **Elevated Temperature Properties:** - **Service Temperature:** Up to 1090°C (2000°F) - **Creep Strength:** Excellent up to 870°C (1600°F) - **Stress Rupture:** Maintains integrity under prolonged loading --- #### **4. Product Specifications** **Available Forms & Sizes:** - **Thickness:** 5mm to 150mm (0.187" to 6") - **Width:** 1000mm to 3000mm (39" to 118") - **Length:** 2000mm to 12000mm (78" to 472") - **Surface Finish:** Hot rolled, annealed, pickled, or machined **Standard Specifications:** - **Thickness Tolerance:** ±5% or ±0.25mm, whichever is greater - **Flatness:** Typically 5mm per meter maximum - **Straightness:** 1mm per meter maximum - **Surface Quality:** Free from defects per applicable standards --- #### **5. Product Applications** **Pressure Vessel Applications:** - **Reactor Vessels:** For chemical and petrochemical processes - **Heat Exchanger Shells:** Handling corrosive media - **Pressure Containment:** In oil and gas production systems - **Storage Tanks:** For aggressive chemicals **Chemical Processing:** - **Column Internals:** Trays, packing support plates - **Mixer Components:** Impellers, baffle plates - **Reactor Parts:** Agitators, internal structures - **Process Equipment:** Chambers, housings, covers **Oil & Gas Industry:** - **Wellhead Components:** Flanges, support plates - **Pipeline Equipment:** Valve bodies, compressor parts - **Subsea Structures:** Manifold plates, support frames - **Sour Service Applications:** H₂S and CO₂ resistant components **Pollution Control:** - **Flue Gas Desulfurization:** Absorber tower shells - **Scrubber Systems:** Casing and structural components - **Waste Treatment:** Tank and vessel construction - **Stack Liners:** Corrosive gas handling --- #### **6. International Standards** **Material Standards:** - **UNS N10276**: Unified Numbering System designation - **ASTM B575**: Standard for Plate, Sheet, and Strip - **ASME SB575**: 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 - **ASME Section VIII**: Pressure vessel construction - **PED 2014/68/EU**: European Pressure Equipment Directive - **API 6ACRA**: Corrosion-resistant alloy applications **Testing & Certification:** - **ASTM A578**: Ultrasonic Examination - **ASTM E112**: Grain Size Determination - **ASTM E384**: Microhardness Testing - **EN 10204 3.1/3.2**: Material certification --- #### **7. Corrosion Resistance** **Excellent Performance In:** - **Hydrochloric Acid:** All concentrations and temperatures - **Sulfuric Acid:** Wide concentration range - **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 --- #### **8. Fabrication Characteristics** **Machining:** - **Machinability Rating:** 40-50% (compared to 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Speeds:** 15-25 m/min for milling operations - **Coolant Requirements:** Essential for optimum tool life **Welding:** - **Recommended Processes:** GTAW, GMAW, SMAW - **Filler Metals:** ERNiCrMo-4 - **Preheat:** Generally not required - **Post-Weld Heat Treatment:** Usually not necessary **Forming:** - **Cold Forming:** Good formability in annealed condition - **Hot Forming:** Temperature range 1175-1250°C - **Minimum Bend Radius:** 3 × thickness for 90° bends - **Springback:** Higher than carbon steels, requires compensation --- #### **9. Heat Treatment** **Solution Annealing:** - **Temperature:** 1120-1175°C (2050-2150°F) - **Cooling:** Rapid water quench or fast air cool - **Purpose:** To dissolve precipitated phases and restore corrosion resistance **Important Considerations:** - Stress relieving not recommended - Rapid cooling essential after annealing - No aging treatment required --- #### **10. Quality Assurance** **Testing Requirements:** - **Chemical Analysis:** Certified mill test reports - **Mechanical Testing:** Tensile, hardness tests - **Non-Destructive Testing:** UT, RT, MT, PT as specified - **Dimensional Inspection:** To specified tolerances - **Surface Inspection:** Visual and dimensional checks **Certification:** - **Material Certificates:** EN 10204 3.1/3.2 - **NACE Compliance:** For sour service applications - **Third-Party Inspection:** Available as required - **Traceability:** Complete documentation from melt to final plate --- #### **11. Key Advantages** * **Exceptional Corrosion Resistance:** Outstanding performance in diverse corrosive environments * **High Strength:** Maintains mechanical properties at elevated temperatures * **Excellent Fabricability:** Good weldability and formability * **Versatile Applications:** Suitable for various industrial sectors * **Industry Acceptance:** Complies with major international standards * **Long Service Life:** Reduced maintenance and replacement costs * **Proven Reliability:** Extensive service history in critical applications Hastelloy C-276 plate provides engineers and fabricators with a reliable, high-performance material solution for critical applications in chemical processing, oil & gas, pollution control, and power generation industries where both exceptional corrosion resistance and mechanical strength are required for safe and reliable operation.

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 2032 gallon liquid totes Special package is available on request.