Alloy 201，Nickel 201 Bar(Round bar, Flat bar)，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 Bar (Round & Flat) UNS N02201** #### **1. Product Overview** **Nickel 201 Bar** (commercially known as **Alloy 201 Bar**) is a wrought product form supplied as round bars and flat bars, manufactured from low-carbon commercially pure nickel. This grade is specifically designed with a maximum carbon content of 0.02% to prevent grain-boundary carbide precipitation, making it the preferred material for applications involving continuous service temperatures above **315°C (600°F)**. Nickel 201 Round Bar and Flat Bar maintain all the advantageous properties of pure nickel – including exceptional corrosion resistance, high thermal and electrical conductivity, and good mechanical properties – while offering superior performance and structural integrity in high-temperature environments. These product forms are ideal for machining, forging, and fabricating components for elevated temperature service. #### **2. Chemical Composition (% Weight)** The key distinction from Nickel 200 is the strictly controlled low carbon content. | Element | Content (%) (ASTM B160) | 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 (Typical for Bar)** **Annealed Condition:** * **Tensile Strength:** 380 - 480 MPa (55 - 70 ksi) * **Yield Strength (0.2% Offset):** 105 - 195 MPa (15 - 28 ksi) * **Elongation (in 2 inches / 50mm):** 45 - 55% **High-Temperature Mechanical Properties (at 500°C/932°F):** * **Tensile Strength:** ~ 250 MPa (36 ksi) * **Yield Strength:** ~ 100 MPa (15 ksi) * **Creep Rupture Strength:** Excellent long-term performance #### **5. International Standards for Bar** Nickel 201 Round Bar and Flat Bar are supplied according to these international standards: | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B160** | Standard Specification for Nickel Rod and Bar | | **ASME** | **SB-160** | Nickel Rod and Bar (for ASME Boiler and Pressure Vessel Code) | | **SAE Aerospace** | **AMS 5556** | Bar, Nickel Alloy, Corrosion and Heat-Resistant | | **UNS** | **N02201** | Unified Numbering System | | **EN (Europe)** | **EN 10095** | Ni 99.2 (Low Carbon) | #### **6. Key Characteristics & Advantages** * **Excellent High-Temperature Stability:** Superior resistance to embrittlement at temperatures above 315°C (600°F) due to controlled carbon content * **Outstanding Corrosion Resistance:** Excellent performance in caustic alkalis, reducing environments, and high-temperature chemical processes * **Superior Machinability:** Good machining characteristics (approximately 30% relative to free-cutting brass) in both round and flat bar forms * **High Thermal Conductivity:** Efficient heat transfer capability maintained at elevated temperatures * **Excellent Fabricability:** Can be readily welded, formed, and forged using standard techniques * **Consistent Properties:** Uniform mechanical and physical properties throughout the bar cross-section #### **7. Temperature Capability** * **Maximum Recommended Continuous Service:** **600°C (1112°F)** * **Intermittent Service:** Up to 815°C (1500°F) for short durations * **Cryogenic Service:** Maintains excellent properties down to -196°C (-321°F) #### **8. Product Applications** **Round Bar Applications:** * **High-Temperature Valve Stems:** For chemical processing equipment * **Furnace Components:** Radiant tube supports and heating element fixtures * **Agitator Shafts:** For high-temperature chemical reactors * **Fastener Stock:** For bolts, studs, and nuts in elevated temperature service **Flat Bar Applications:** * **Structural Supports:** For high-temperature furnaces and processing equipment * **Heat Treating Fixtures:** Baskets, trays, and support frames * **Machined Components:** Base plates, brackets, and structural elements * **Furnace Rails:** For conveyor systems in heat treatment operations **Industry Applications:** * **Chemical Processing:** High-temperature reactors, evaporators, and distillation columns * **Heat Treatment Industry:** Furnace components, fixtures, and handling equipment * **Aerospace:** Rocket engine components, high-temperature structural parts * **Power Generation:** High-temperature boiler components and support systems * **Glass Manufacturing:** Mold components and handling equipment --- **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. Performance verification at specific service temperatures is recommended.

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 1639 gallon liquid totes Special package is available on request.