Alloy 201，Nickel 201 Fittings，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 Fittings (UNS N02201)** #### **1. Product Overview** **Nickel 201 Fittings** (commercially known as **Alloy 201 Fittings**) are precision-engineered piping components manufactured from low-carbon commercially pure nickel. These fittings are specifically designed for high-temperature piping systems where standard Nickel 200 fittings would be susceptible to grain-boundary carbide embrittlement. With a maximum carbon content of 0.02%, these fittings provide reliable performance in continuous service temperatures exceeding **315°C (600°F)**. Available in various configurations including elbows, tees, reducers, caps, and couplings, Nickel 201 Fittings ensure system integrity in aggressive chemical environments at elevated temperatures. The fittings are manufactured to maintain dimensional accuracy, surface quality, and corrosion resistance suitable for critical high-temperature piping systems. #### **2. Chemical Composition (% Weight)** Composition conforms to ASTM B366 for wrought nickel alloy fittings. | Element | Content (%) (ASTM B366) | 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 (Solution Annealed Condition)** | 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% | | **Hardness (Rockwell B)** | 65 - 80 HRB | 65 - 80 HRB | **High-Temperature Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 250 MPa (36 ksi) * **Yield Strength:** ~ 100 MPa (15 ksi) * **Creep Resistance:** Excellent long-term performance #### **5. International Standards for Fittings** Nickel 201 Fittings conform to these international standards: | 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 | | **MSS** | **MSS SP-43** | Wrought Stainless Steel Buttwelding Fittings | | **UNS** | **N02201** | Unified Numbering System | #### **6. Key Characteristics & Advantages** * **Superior High-Temperature Performance:** Excellent resistance to embrittlement at temperatures above 315°C (600°F) due to controlled carbon content * **Excellent Corrosion Resistance:** Outstanding performance in caustic alkalis, reducing acids, and high-temperature chemical environments * **Precision Manufacturing:** Manufactured to strict dimensional standards ensuring proper fit-up in high-temperature piping systems * **Good Weldability:** Can be readily welded to Nickel 201 pipe using GTAW (TIG) and GMAW (MIG) processes with matching filler metals * **Smooth Surface Finish:** Optimized internal surfaces minimize turbulence and pressure drop in high-temperature service * **Dimensional Stability:** Maintains shape and dimensions under thermal cycling and mechanical stress #### **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** Nickel 201 Fittings are specified for high-temperature piping systems across multiple industries: * **High-Temperature Chemical Processing:** - Caustic evaporator and concentrator systems - High-temperature reactor transfer lines - Hot chemical processing pipelines - High-temperature distillation systems * **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 * **Other High-Temperature Applications:** - High-temperature heat transfer systems - Process piping for elevated temperature operations - High-purity chemical systems at elevated temperatures - Nuclear energy high-temperature components --- **Disclaimer:** The technical information provided is for reference purposes. 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. Proper installation and welding procedures must be followed to ensure system integrity at elevated temperatures. Pressure-temperature ratings must be derated according to applicable codes for high-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 1645 gallon liquid totes Special package is available on request.