Alloy C276,Inconel C276 ,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 / Inconel C-276 (UNS N10276)** **Alloy C-276** (commercially known as **Inconel C-276**) is a nickel-molybdenum-chromium superalloy with exceptional corrosion resistance in a wide range of severe environments. This versatile alloy maintains excellent stability in both oxidizing and reducing media and offers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. As one of the most widely used corrosion-resistant alloys, it serves across multiple industries where reliability in aggressive environments is paramount. --- #### **1. Chemical Composition** The chemical composition of Alloy C-276 is precisely balanced for optimal corrosion resistance: | 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 low carbon and silicon content minimizes carbide precipitation and maintains corrosion resistance in welded structures. The combination of molybdenum and chromium provides resistance to both reducing and oxidizing environments.* --- #### **2. Physical Properties** Alloy C-276 exhibits the following 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** **Typical Mechanical Properties at Room Temperature:** | Property | Annealed Condition | |:---|:---| | **Tensile Strength** | 790 MPa (115 ksi) | | **Yield Strength (0.2% Offset)** | 415 MPa (60 ksi) | | **Elongation** | 55% | | **Reduction of Area** | 65% | | **Hardness** | 90 HRB | **Elevated Temperature Properties:** - **Service Temperature:** Up to 1090°C (2000°F) - **Creep Strength:** Excellent up to 870°C (1600°F) - **Stress Rupture:** Maintains good strength at high temperatures --- #### **4. Product Applications** **Chemical Processing Industry:** - **Reactors and Vessels:** For aggressive chemical production - **Heat Exchangers:** In corrosive service environments - **Pumps and Valves:** Handling acids and chlorides - **Distillation Columns:** Components and internals - **Duplexing and Linings:** For corrosion protection **Pollution Control:** - **Flue Gas Desulfurization Systems:** Scrubbers and ductwork - **Waste Incineration Plants:** High-temperature components - **Chemical Waste Processing:** Equipment and piping - **Air Pollution Control:** Stack liners and dampers **Oil & Gas Industry:** - **Downhole Components:** In sour well environments - **Production Tubing:** For corrosive crude production - **Process Piping:** In refineries and petrochemical plants - **Subsea Equipment:** Components exposed to seawater **Pulp and Paper Industry:** - **Digester Systems:** For chemical pulp processing - **Bleach Plants:** Handling chlorine dioxide and chlorides - **Chemical Recovery Systems:** Evaporators and furnaces **Other Applications:** - **Pharmaceutical Industry:** Reaction vessels and piping - **Marine Engineering:** Seawater handling systems - **Nuclear Fuel Reprocessing:** Chemical processing equipment - **Industrial Heat Treatment:** Furnace components --- #### **5. International Standards** **Material Standards:** - **UNS N10276**: Unified Numbering System designation - **ASTM B575**: Standard for Plate, Sheet, and Strip - **ASTM B574**: Standard for Bar and Wire - **ASTM B622**: Standard for Seamless Pipe and Tube - **ASTM B619**: Standard for Welded Pipe - **ASME SB575/SB574/SB622**: ASME Boiler and Pressure Vessel Code **International Equivalents:** - **DIN 2.4819**: German Industrial Standard - **EN 10095**: NiMo16Cr15W (European Standard) - **JIS NW 0276**: Japanese Industrial Standard - **GB NS334**: Chinese National Standard **Industry Specifications:** - **NACE MR0175/ISO 15156**: Suitable for sour service - **API 6ACRA**: Corrosion-resistant alloy applications - **PED 2014/68/EU**: Pressure Equipment Directive compliant - **ASME Section VIII**: Pressure vessel construction --- #### **6. Corrosion Resistance** **Excellent Resistance To:** - **Hydrochloric Acid:** At all concentrations and temperatures - **Sulfuric Acid:** Excellent performance across concentrations - **Phosphoric Acid:** Resistant to all concentrations - **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 (ASTM G48):** >85°C - **Critical Crevice Temperature:** >65°C - **Pitting Resistance Equivalent Number (PREN):** ~69 - **General Corrosion Rate:** <0.1 mm/year in most aggressive media --- #### **7. Fabrication Characteristics** **Machining:** - **Machinability Rating:** 40-50% (compared to 100% for 1212 steel) - **Tool Materials:** Carbide tools recommended - **Cutting Speeds:** Moderate with positive rake angles - **Coolant Requirements:** Essential for optimum tool life **Welding:** - **Recommended Processes:** GTAW, GMAW, SMAW - **Filler Metals:** ERNiCrMo-4, ENiCrMo-4 - **Preheat:** Generally not required - **Post-Weld Heat Treatment:** Usually not necessary **Forming:** - **Cold Working:** Good formability in annealed condition - **Hot Working:** Temperature range 1175-1250°C - **Annealing:** 1150°C minimum, rapid cooling required --- #### **8. 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 **Stress Relieving:** - **Not Recommended:** May compromise corrosion resistance - **Alternative:** Full solution annealing if stress relief is necessary --- #### **9. Key Advantages** * **Versatile Corrosion Resistance:** Performs in both oxidizing and reducing environments * **Excellent Fabricability:** Good welding and forming characteristics * **Wide Temperature Range:** Suitable from cryogenic to high temperatures * **Proven Reliability:** Extensive service history in critical applications * **Industry Acceptance:** Recognized by all major international standards * **Low Maintenance:** Long service life reduces replacement costs * **Non-Magnetic:** Suitable for sensitive applications * **Ready Availability:** Multiple product forms and sizes available --- #### **10. Quality Assurance** **Testing & Certification:** - **Chemical Analysis:** Certified to specified limits - **Mechanical Testing:** Tensile, hardness, and bend tests - **Corrosion Testing:** Per customer requirements - **Non-Destructive Testing:** UT, RT, PT, MT as specified - **Certification:** EN 10204 3.1/3.2 material certificates Alloy C-276 represents the benchmark for corrosion-resistant nickel alloys, providing reliable performance in the most aggressive chemical environments across chemical processing, pollution control, oil and gas, and other demanding industries 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 2014 gallon liquid totes Special package is available on request.