Alloy 201，Nickel 201 Pipe，UNS N02201，EFORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA11，American Specs:ASTM B162 ASTM B163 ASTM B725 ASTM B730 AMS 5553 Sheet and Strip，German Specs:WS 2.4061 WS 2.4068

### **Technical Datasheet: Nickel 201 Pipe (UNS N02201)** #### **1. Product Overview** **Nickel 201 Pipe** (commercially known as **Alloy 201 Pipe**) is a wrought product form manufactured from low-carbon commercially pure nickel, specifically designed for high-temperature applications where standard Nickel 200 would be susceptible to embrittlement. With a maximum carbon content of 0.02%, this pipe is ideal for continuous service in temperatures exceeding **315°C (600°F)**. Available in both seamless and welded forms, Nickel 201 Pipe maintains excellent corrosion resistance while providing superior performance in elevated temperature environments. The low carbon content prevents the formation of grain-boundary carbides, ensuring long-term structural integrity in high-temperature chemical processing, heat treatment, and power generation applications. #### **2. Chemical Composition (% Weight)** | Element | Content (%) (ASTM B161/163) | Content (%) (Typical) | | :--- | :--- | :--- | | **Nickel (Ni)** | 99.0 min | ≥ 99.6 | | **Carbon (C)** | **0.02 max** | **0.01** | | **Manganese (Mn)** | 0.35 max | 0.20 | | **Iron (Fe)** | 0.40 max | 0.20 | | **Copper (Cu)** | 0.25 max | 0.15 | | **Silicon (Si)** | 0.35 max | 0.15 | | **Sulfur (S)** | 0.01 max | 0.005 | #### **3. Physical Properties** | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Density** | 8.89 g/cm³ | 0.321 lb/in³ | | **Melting Point** | 1435-1445 °C | 2615-2633 °F | | **Thermal Conductivity** (at 25°C) | 70 W/m·K | 485 BTU·in/hr·ft²·°F | | **Electrical Resistivity** | 0.095 µΩ·m | 36.5 µΩ·in | | **Modulus of Elasticity** | 186 GPa | 27 x 10⁶ psi | | **Thermal Expansion Coefficient** (20-100°C) | 13.3 µm/m·°C | 7.4 x 10⁻⁶ in/in·°F | | **Curie Temperature** | ~ 360 °C | ~ 680 °F | #### **4. Mechanical Properties (Typical for Annealed Pipe)** | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Tensile Strength** | 380 - 480 MPa | 55 - 70 ksi | | **Yield Strength (0.2% Offset)** | 105 - 195 MPa | 15 - 28 ksi | | **Elongation (in 2 inches)** | 45 - 55% | 45 - 55% | **High-Temperature Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 250 MPa (36 ksi) * **Yield Strength:** ~ 100 MPa (15 ksi) * **Creep Strength:** Excellent long-term performance #### **5. International Standards for Pipe** | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B161** | Nickel Seamless Pipe and Tube | | **ASTM International** | **ASTM B163** | Seamless Nickel and Nickel Alloy Condenser Tubes | | **ASTM International** | **ASTM B729/B729M** | Seamless UNS N02200 & N02201 Pipe | | **ASME** | **SB-161** | Nickel Seamless Pipe and Tube | | **ASME** | **SB-163** | Seamless Nickel and Nickel Alloy Condenser Tubes | | **ASME** | **SB-729** | Seamless UNS N02200 & N02201 Pipe | | **UNS** | **N02201** | Unified Numbering System | #### **6. Key Characteristics & Advantages** * **Superior High-Temperature Performance:** Excellent resistance to embrittlement at temperatures above 315°C (600°F) * **Excellent Corrosion Resistance:** Outstanding performance in caustic alkalis, reducing acids, and high-temperature chemical environments * **Good Weldability:** Can be readily welded using GTAW (TIG) and GMAW (MIG) processes with matching filler metals * **High Thermal Conductivity:** Efficient heat transfer capability maintained at elevated temperatures * **Excellent Fabricability:** Can be bent, formed, and expanded using standard techniques * **Long-Term Stability:** Maintains mechanical properties and corrosion resistance during extended high-temperature service #### **7. Temperature Capability** * **Maximum Continuous Service:** **600°C (1112°F)** * **Intermittent Service:** Up to 815°C (1500°F) * **Minimum Service Temperature:** -196°C (-321°F) #### **8. Product Applications** **Chemical Processing Industry:** * High-temperature caustic transfer lines * Hot chemical processing pipelines * High-temperature reactor feed systems * Evaporator and concentrator tubes **Heat Treatment & Furnace Applications:** * Heat treatment furnace piping * Radiant tube assemblies * Thermocouple protection tubes * High-temperature gas conveyance systems **Power Generation:** * High-temperature boiler components * Heat exchanger tubing * Superheater and reheater tubes * High-temperature instrument lines **Other High-Temperature Applications:** * High-temperature heat exchanger tubing * Process piping for high-temperature operations * High-purity chemical transfer at elevated temperatures * Nuclear energy components --- **Disclaimer:** The information provided is for technical reference. Actual properties may vary based on manufacturing process, size, and heat treatment. For critical high-temperature applications, consult the complete material specifications and qualified engineering resources. Pressure rating calculations must consider temperature derating factors.

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 1640 gallon liquid totes Special package is available on request.