Alloy 205，Nickel 205 Fittings，UNS N02205，EFORU

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

### Technical Datasheet: Nickel 205 Fittings (UNS N02205) #### 1. Product Overview **Nickel 205 Fittings** (commercially known as **Alloy 205 Fittings**) are precision-engineered piping components manufactured from commercially pure nickel with controlled magnesium addition (0.01-0.10%). These fittings are specifically designed for high-temperature piping systems where enhanced oxidation resistance is required. The magnesium content provides superior protection against high-temperature oxidation compared to standard nickel fittings, making them ideal for continuous service temperatures up to **650°C (1200°F)**. Available in various configurations including elbows, tees, reducers, caps, and couplings, Nickel 205 Fittings ensure system integrity in aggressive chemical environments and oxidizing atmospheres at elevated temperatures. #### 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 (Solution Annealed Condition) | 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% | | **Hardness (Rockwell B)** | 70 - 85 HRB | 70 - 85 HRB | **High-Temperature Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 280 MPa (41 ksi) * **Yield Strength:** ~ 120 MPa (17 ksi) * **Oxidation Resistance:** Superior to standard nickel fittings #### 5. International Standards for Fittings | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B366** | Factory-Made Wrought Nickel and Nickel Alloy Fittings | | **ASME** | **SB-366** | Factory-Made Wrought Nickel and Nickel Alloy Fittings | | **ASME (Dimensional)** | **ASME B16.9** | Wrought Buttwelding Fittings | | **ASME (Dimensional)** | **ASME B16.11** | Forged Fittings, Socket-Welding and Threaded | | **ASME (Dimensional)** | **ASME B16.28** | Wrought Steel Buttwelding Short Radius Elbows and Returns | | **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 Performance:** Better mechanical properties retention at elevated temperatures * **Excellent Corrosion Resistance:** Good performance in caustic environments and reducing atmospheres * **Precision Manufacturing:** Manufactured to strict dimensional standards ensuring proper fit-up * **Good Weldability:** Can be readily welded to Nickel 205 pipe using standard techniques * **Smooth Surface Finish:** Optimized internal surfaces minimize turbulence and pressure drop #### 7. Types of Fittings Available * **Buttweld Fittings:** - Elbows (45°, 90°, 180°) - Tees (Equal and Reducing) - Reducers (Concentric and Eccentric) - Caps and Stub Ends * **Socket Weld Fittings:** - Unions - Elbows - Tees - Couplings * **Threaded Fittings:** - Nipples - Couplings - Elbows - Tees #### 8. Product Applications **High-Temperature Chemical Processing:** * High-temperature chemical transfer systems * Oxidizing atmosphere process piping * High-temperature reactor transfer lines * Chemical processing equipment at elevated temperatures **Heat Treatment Industry:** * High-temperature furnace piping systems * Heat treatment gas conveyance systems * High-temperature heat exchanger connections * Thermal processing equipment **Power Generation:** * High-temperature boiler systems * Superheater and reheater piping * High-pressure steam systems * Power plant high-temperature utility lines **Specialized Applications:** * High-temperature heat transfer systems * Process piping for elevated temperature operations * Semiconductor manufacturing equipment * Aerospace high-temperature fluid systems #### 9. Quality Assurance & Testing * **Dimensional Inspection:** Verification to ASME B16.9/B16.11 standards * **Surface Examination:** Visual and liquid penetrant testing * **Material Verification:** Positive material identification (PMI) * **Pressure Testing:** Hydrostatic or pneumatic testing as required * **Certification:** Material test certificates with full traceability --- **Disclaimer:** The technical information provided is for reference purposes. Actual properties may vary based on manufacturing process, size, and heat treatment. For critical applications, consult the complete material specifications and qualified engineering resources. Proper installation and welding procedures must be followed to ensure system integrity at elevated temperatures.

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 1658 gallon liquid totes Special package is available on request.