Alloy 201，Nickel 201 Tube，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 Tube (UNS N02201)** #### **1. Product Overview** **Nickel 201 Tube** (commercially known as **Alloy 201 Tube**) is a low-carbon version of commercially pure nickel tubing, specifically engineered for high-temperature applications where resistance to grain-boundary carbide precipitation is crucial. With a maximum carbon content of 0.02%, this tubing maintains exceptional structural integrity in continuous service temperatures exceeding **315°C (600°F)**, making it superior to Nickel 200 for elevated temperature applications. Available in seamless and welded forms, Nickel 201 Tube combines excellent corrosion resistance with high thermal conductivity and good mechanical properties, making it ideal for heat exchangers, condenser systems, and high-temperature process applications where reliability and long-term performance are essential. #### **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 Tube)** | 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 resistance to deformation under long-term stress #### **5. International Standards for Tube** | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B161** | Standard Specification for Nickel Seamless Pipe and Tube | | **ASTM International** | **ASTM B163** | Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes | | **ASTM International** | **ASTM B725/B725M** | Welded Nickel and Nickel Alloy Tubes | | **ASME** | **SB-161** | Nickel Seamless Pipe and Tube | | **ASME** | **SB-163** | Seamless Nickel and Nickel Alloy Condenser Tubes | | **ASME** | **SB-725** | Welded Nickel and Nickel Alloy Tubes | | **UNS** | **N02201** | Unified Numbering System | #### **6. Key Characteristics & Advantages** * **Superior High-Temperature Stability:** Excellent resistance to embrittlement at temperatures above 315°C (600°F) due to controlled carbon content * **Exceptional Corrosion Resistance:** Outstanding performance in caustic environments, reducing acids, and high-temperature chemical processes * **Excellent Heat Transfer Properties:** High thermal conductivity makes it ideal for heat exchanger applications * **Good Fabricability:** Can be readily bent, expanded, and formed using standard tube working equipment * **Excellent Weldability:** Suitable for all common welding techniques including GTAW (TIG) and GMAW (MIG) * **Long Service Life:** Maintains mechanical and corrosion-resistant properties during extended high-temperature exposure #### **7. Temperature Capability** * **Maximum Continuous Service:** **600°C (1112°F)** * **Intermittent Service:** Up to 815°C (1500°F) for short durations * **Cryogenic Service:** Maintains excellent properties down to -196°C (-321°F) #### **8. Product Applications** **Heat Exchanger & Condenser Applications:** * Shell and tube heat exchangers for high-temperature service * Condenser tubes in chemical processing and power generation * High-temperature heat recovery systems * Evaporator and reboller tubes **Chemical Processing Industry:** * High-temperature process tubing * Catalyst carrier tubes * High-purity chemical transfer lines * High-temperature reactor tubes **Power Generation:** * High-pressure boiler tubes * Superheater and reheater components * High-temperature heat exchanger tubing * Power plant condenser systems **Other High-Temperature Applications:** * Furnace components * High-temperature instrumentation tubing * Nuclear reactor components * Aerospace heat exchanger systems --- **Disclaimer:** The technical information provided is for reference purposes. Actual properties may vary based on manufacturing process, size, wall thickness, and heat treatment. For critical high-temperature applications, consult the complete material specifications and qualified engineering resources. Pressure-temperature ratings must be calculated according to applicable codes and standards.

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 1641 gallon liquid totes Special package is available on request.