Alloy 205，Nickel 205 Pipe，UNS N02205，EFORU

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

### **Technical Datasheet: Nickel 205 Pipe (UNS N02205)** #### **1. Product Overview** **Nickel 205 Pipe** (commercially known as **Alloy 205 Pipe**) is a wrought product form manufactured from commercially pure nickel with controlled magnesium addition (0.01-0.10%). This unique composition provides enhanced oxidation resistance and improved high-temperature performance compared to standard Nickel 200/201 pipes, making it ideal for applications involving elevated temperatures in oxidizing atmospheres. Available in both seamless and welded forms, Nickel 205 Pipe combines excellent corrosion resistance with superior high-temperature stability. The magnesium addition significantly improves the material's resistance to oxidation at temperatures up to **650°C (1200°F)**, while maintaining good mechanical properties and corrosion resistance in various chemical environments. #### **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 Pipe)** | 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 Pipe** | 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 | | **ASME** | **SB-161** | Nickel Seamless Pipe and Tube | | **ASME** | **SB-163** | Seamless Nickel and Nickel Alloy Condenser Tubes | | **UNS** | **N02205** | Unified Numbering System | #### **6. Key Characteristics & Advantages** * **Enhanced Oxidation Resistance:** Superior protection against high-temperature oxidation up to 650°C (1200°F) * **Improved High-Temperature Strength:** Better mechanical properties retention at elevated temperatures * **Excellent Corrosion Resistance:** Good resistance to caustic environments and reducing atmospheres * **Good Weldability:** Can be readily welded using GTAW (TIG) and GMAW (MIG) processes * **Superior Fabricability:** Can be bent, formed, and expanded using standard tube working equipment * **Maintained Thermal Conductivity:** Efficient heat transfer capability 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** **High-Temperature Processing:** * High-temperature chemical transfer lines * Oxidizing atmosphere process piping * High-temperature gas conveyance systems * Heat treatment furnace piping **Heat Exchanger Applications:** * Shell and tube heat exchangers for elevated temperature service * High-temperature condenser tubes * Process heat recovery systems * High-temperature heater tubes **Electrical & Electronic:** * High-temperature instrument lines * Semiconductor process gas lines * Vacuum furnace components * Electrical bus conduit for high-temperature areas **Specialized Applications:** * Aerospace high-temperature fluid systems * Nuclear instrumentation piping * High-purity chemical processing at elevated temperatures * Glass manufacturing exhaust systems #### **9. Manufacturing & Quality Assurance** * **Production Methods:** Seamless hot finished, seamless cold drawn, or welded and drawn * **Testing Requirements:** Hydrostatic testing, non-destructive examination, mechanical testing * **Certification:** Mill test certificates with full traceability * **Surface Finish:** Available in various finishes including pickled, bright annealed, and polished --- **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, with appropriate derating factors for elevated temperature service.

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 1653 gallon liquid totes Special package is available on request.