C 201 Commercially Pure Nickel,UNS N02201,E FORU

### **Product Introduction: C-201 Low Carbon Nickel (UNS N02201)** **C-201 Low Carbon Nickel (UNS N02201)** is a commercially pure wrought nickel alloy with a controlled low carbon content (0.02% maximum), specifically designed for applications requiring superior resistance to graphitization and improved performance at elevated temperatures. This alloy maintains all the beneficial properties of pure nickel while offering enhanced stability in high-temperature environments where conventional commercially pure nickel might be susceptible to embrittlement. The alloy's low carbon composition minimizes the risk of graphitization and intergranular corrosion, making it particularly suitable for high-temperature electronic components, chemical processing equipment, and applications involving elevated temperature service. --- #### **1. Chemical Composition (Weight %)** The chemical composition of C-201 Low Carbon Nickel per UNS N02201 is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 99.0 min | **Cobalt (Co)** | 0.15 max | | **Copper (Cu)** | 0.25 max | **Iron (Fe)** | 0.40 max | | **Manganese (Mn)** | 0.35 max | **Carbon (C)** | 0.02 max | | **Silicon (Si)** | 0.35 max | **Sulfur (S)** | 0.01 max | | **Magnesium (Mg)** | 0.10 max | **Other Elements** | 0.50 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.89 g/cm³ | 0.321 lb/in³ | | **Melting Point** | 1435 - 1445 °C | 2615 - 2633 °F | | **Thermal Conductivity** | 70.0 W/m·K | 485 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 13.3 μm/m·°C | 7.4 μin/in·°F | | **Specific Heat** | 444 J/kg·K | 0.106 Btu/lb·°F | | **Electrical Resistivity** | 0.095 μΩ·m | 57.3 Ω·cir mil/ft | | **Modulus of Elasticity** | 180 GPa | 26.1 x 10⁶ psi | **Mechanical Properties (Annealed Condition):** | Property | Value | |----------|-----------------| | **Tensile Strength** | 380 - 480 MPa | 55 - 70 ksi | | **Yield Strength (0.2% Offset)** | 120 - 200 MPa | 17 - 29 ksi | | **Elongation** | 40 - 50% | | **Hardness (Rockwell B)** | 50 - 70 HRB | **Elevated Temperature Properties (at 315°C/600°F):** | **Tensile Strength** | 350 MPa | 51 ksi | | **Yield Strength** | 110 MPa | 16 ksi | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Low Carbon Content**: Minimizes graphitization and intergranular attack at elevated temperatures - **Excellent Corrosion Resistance**: Superior performance in alkaline environments and various corrosive media - **High Thermal Conductivity**: Efficient heat transfer capabilities - **Excellent Electrical Conductivity**: Low electrical resistance for electronic applications - **Good Mechanical Properties**: Balanced combination of strength and ductility - **Superior Fabricability**: Excellent weldability, formability, and machinability **Product Applications:** C-201 Low Carbon Nickel serves critical functions in specialized applications: - **Electronics & Electrical Engineering**: - High-temperature electronic components - Vacuum tube components - Transistor bases and electronic supports - Magnetic shielding applications - **Chemical Processing Industry**: - High-temperature caustic evaporation equipment - Chemical reaction vessels for elevated temperature service - Heat exchangers operating at high temperatures - Process piping systems - **Aerospace & Defense**: - Aerospace electronic components - Waveguide components - High-temperature instrumentation - Communication equipment - **Specialized Industrial Applications**: - Anodizing racks for high-temperature operation - Food processing equipment - Pharmaceutical manufacturing components - High-purity chemical processing --- #### **4. International Standards & Specifications** C-201 Low Carbon Nickel complies with the following international standards: **Primary Specifications:** - **UNS N02201**: Unified Numbering System - **ASTM B160**: Nickel Rod and Bar - **ASTM B161**: Nickel Seamless Pipe and Tube - **ASTM B162**: Nickel Plate, Sheet, and Strip - **ASTM B163**: Nickel Seamless Condenser and Heat-Exchanger Tubes **International Equivalents:** - **EN**: NW 2201 (Ni99.0LowC) - **DIN**: 2.4061 - **JIS**: NCP 02 - **ISO**: NW 2201 - **AMS**: 5554 (Aerospace Material Specification) --- #### **Summary of Key Advantages** - **Low Carbon Composition**: 0.02% maximum carbon content prevents graphitization - **Enhanced High-Temperature Stability**: Superior performance in elevated temperature applications - **Excellent Corrosion Resistance**: Outstanding performance in alkaline and chemical environments - **High Conductivity**: Excellent thermal and electrical conductivity - **Proven Reliability**: Established track record in demanding applications - **Comprehensive Standardization**: Meets international quality and performance standards **Technical Note**: C-201 Low Carbon Nickel exhibits excellent weldability using common welding processes including GTAW, GMAW, and SMAW. The low carbon content significantly reduces the risk of sensitization and intergranular corrosion in the heat-affected zone after welding. The alloy work hardens during cold working operations, requiring intermediate annealing at 650-815°C (1200-1500°F) for severe deformations. The material demonstrates particularly excellent resistance to corrosion by caustic alkalis and maintains this resistance at elevated temperatures. Proper cleaning and handling procedures should be maintained to prevent surface contamination. The alloy's low carbon content makes it particularly suitable for applications involving prolonged exposure to temperatures between 315-650°C (600-1200°F) where conventional nickel might experience graphitization.

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 3185 gallon liquid totes Special package is available on request.