Alloy 205，Nickel 205 Tube，UNS N02205，EFORU

British Specs:，American Specs:AMS 5555 Wire and Ribbon MIL-N-46025，German Specs:

### Technical Datasheet: Nickel 205 Tube (UNS N02205) #### 1. Product Overview **Nickel 205 Tube** (commercially known as **Alloy 205 Tube**) is a wrought product manufactured from commercially pure nickel with a controlled magnesium addition (0.01-0.10%). This unique composition offers enhanced oxidation resistance and improved high-temperature performance compared to standard Nickel 200/201 tubes, while maintaining excellent corrosion resistance and electrical conductivity. Available in both seamless and welded forms, Nickel 205 Tube is specifically designed for applications requiring reliable performance in oxidizing atmospheres at elevated temperatures. The magnesium addition provides superior protection against high-temperature oxidation, making it suitable for heat exchangers, condenser systems, and high-temperature process applications where both corrosion resistance and thermal stability are critical. #### 2. Chemical Composition (% Weight) | Element | Content (%) | Content (%) (Typical) | | :--- | :--- | :--- | | **Nickel (Ni)** | 99.0 min | ≥ 99.0 | | **Magnesium (Mg)** | **0.01 - 0.10** | **0.03 - 0.06** | | **Carbon (C)** | 0.15 max | 0.08 | | **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) | 69 W/m·K | 478 BTU·in/hr·ft²·°F | | **Electrical Resistivity** | 0.096 µΩ·m | 36.8 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** | 400 - 520 MPa | 58 - 75 ksi | | **Yield Strength (0.2% Offset)** | 120 - 240 MPa | 17 - 35 ksi | | **Elongation (in 2 inches)** | 40 - 50% | 40 - 50% | **High-Temperature Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 280 MPa (41 ksi) * **Yield Strength:** ~ 120 MPa (17 ksi) * **Oxidation Resistance:** Superior to Nickel 200/201 #### 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 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** | **N02205** | Unified Numbering System | #### 6. Key Characteristics & Advantages * **Enhanced Oxidation Resistance:** Magnesium addition provides superior protection against high-temperature oxidation up to 650°C (1200°F) * **Improved High-Temperature Stability:** Better mechanical properties retention at elevated temperatures compared to Nickel 200/201 * **Excellent Corrosion Resistance:** Good performance in caustic environments and reducing atmospheres * **Superior Fabricability:** Can be readily bent, expanded, and formed using standard tube working equipment * **Good Weldability:** Suitable for all common welding techniques including GTAW (TIG) and GMAW (MIG) * **Maintained Thermal Conductivity:** Efficient heat transfer characteristics for heat exchanger applications #### 7. Temperature Capability * **Maximum Continuous Service:** **650°C (1200°F)** * **Intermittent Service:** Up to 870°C (1600°F) for short durations * **Optimal Performance Range:** 300-600°C (572-1112°F) * **Minimum Service Temperature:** -196°C (-321°F) #### 8. Product Applications **Heat Exchanger & Condenser Applications:** * Shell and tube heat exchangers for high-temperature service * Condenser tubes in oxidizing atmospheres * High-temperature heat recovery systems * Process heater tubes for elevated temperature applications **Chemical Processing:** * High-temperature process tubing in oxidizing environments * Catalyst carrier tubes for high-temperature processes * High-purity chemical transfer lines at elevated temperatures * Reactor tubes for high-temperature chemical reactions **Electrical & Electronic:** * High-temperature instrument tubing * Semiconductor process gas lines * Vacuum tube components * Electrical insulation sleeves for high-temperature applications **Specialized Applications:** * Aerospace heat exchanger tubing * Nuclear instrumentation tubing * High-temperature sensor protection tubes * Glass manufacturing equipment components #### 9. Manufacturing & Quality Control * **Production Methods:** Seamless (hot finished or cold drawn) or welded and drawn * **Quality Assurance:** Hydrostatic testing, eddy current testing, ultrasonic examination * **Surface Finish:** Available in pickled, bright annealed, or special polished finishes * **Certification:** Full traceability with mill test certificates to applicable standards --- **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 applications, consult the complete material specifications and qualified engineering resources. Performance verification at specific service conditions is recommended for high-temperature applications.

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 1654 gallon liquid totes Special package is available on request.