Alloy 201，Nickel 201 Forgings，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 Forgings (UNS N02201)** #### **1. Product Overview** **Nickel 201 Forgings** (commercially known as **Alloy 201 Forgings**) are high-integrity components manufactured through controlled deformation processes from low-carbon commercially pure nickel. Specifically engineered with a maximum carbon content of 0.02%, these forgings prevent grain-boundary carbide embrittlement, making them ideal for continuous service temperatures exceeding **315°C (600°F)** where standard Nickel 200 forgings would degrade. The forging process enhances the mechanical properties of Nickel 201 by refining the grain structure and improving material density, resulting in superior strength, toughness, and reliability for critical high-temperature applications. These components maintain excellent corrosion resistance while providing enhanced structural stability in demanding elevated temperature environments. #### **2. Chemical Composition (% Weight)** Composition conforms to ASTM B564 for nickel alloy forgings. | Element | Content (%) (ASTM B564) | 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** | 400 - 500 MPa | 58 - 73 ksi | | **Yield Strength (0.2% Offset)** | 120 - 210 MPa | 17 - 30 ksi | | **Elongation (in 4D)** | 40 - 50% | 40 - 50% | | **Reduction of Area** | 65 - 75% | 65 - 75% | | **Hardness (Rockwell B)** | 70 - 85 HRB | 70 - 85 HRB | **High-Temperature Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 260 MPa (38 ksi) * **Yield Strength:** ~ 110 MPa (16 ksi) * **Creep Rupture Strength:** Excellent long-term performance #### **5. International Standards for Forgings** Nickel 201 Forgings are supplied according to these international standards: | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B564** | Standard Specification for Nickel Alloy Forgings | | **ASME** | **SB-564** | Nickel Alloy Forgings (for BPVC) | | **ASTM International** | **ASTM B366** | Factory-Made Wrought Nickel Alloy Fittings | | **SAE Aerospace** | **AMS 5674** | Nickel Alloy Forgings | | **UNS** | **N02201** | Unified Numbering System | | **EN (Europe)** | **EN 10222-5** | Steel Forgings for Pressure Purposes | #### **6. Key Characteristics & Advantages** * **Enhanced High-Temperature Capability:** Superior resistance to grain-boundary embrittlement at temperatures above 315°C (600°F) * **Improved Mechanical Properties:** Forging process refines grain structure, resulting in enhanced strength, toughness, and fatigue resistance * **Superior Structural Integrity:** Continuous grain flow patterns follow component contours, providing optimal stress distribution * **Excellent Corrosion Resistance:** Maintains outstanding performance in caustic environments and reducing acids at elevated temperatures * **Directional Strength Properties:** Grain structure alignment with primary stress directions enhances component reliability * **Good Machinability:** Can be precision machined to close tolerances while maintaining corrosion resistance #### **7. Common Forging Types & Processes** * **Open Die Forgings:** - Large shafts and rotors for high-temperature service - Pressure vessel components for elevated temperature applications - Large valve bodies for high-temperature systems - Custom-shaped high-temperature components * **Closed Die Forgings:** - Pump impellers and casings for hot chemical service - High-temperature valve trim components - Complex shaped parts for furnace applications - High-temperature fitting blanks * **Ring Rolled Forgings:** - High-temperature flanges and collars - Bearing races for elevated temperature service - Specialized containment rings for high-temperature equipment #### **8. Product Applications** Nickel 201 Forgings serve in critical high-temperature applications across various industries: * **High-Temperature Chemical Processing:** - Pump shafts and impellers for hot chemical service - High-temperature valve bodies and stems - Agitator shafts for elevated temperature reactors - Reactor internals for high-temperature processes * **Heat Treatment Industry:** - High-temperature furnace components and fixtures - Heat treating baskets and trays for elevated temperature service - Radiant tube supports and hangers - Sintering furnace components * **Aerospace & Defense:** - Rocket engine components - High-temperature turbine parts - Missile system components - Aircraft engine high-temperature parts * **Power Generation:** - High-temperature turbine components - Boiler parts for elevated temperature service - Heat exchanger components for high-temperature duty - Nuclear reactor high-temperature components --- **Disclaimer:** The technical information provided is for reference purposes. Actual properties may vary based on forging process, heat treatment, and component size. For critical high-temperature applications, consult the complete material specifications and qualified engineering resources. Non-destructive testing is recommended for all critical forged components operating 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 1646 gallon liquid totes Special package is available on request.