Alloy 201,Nickel 201,UNS N02201,EFORU

**Product Data Sheet: Alloy 201 / Nickel 201 (UNS N02201)**   

 **1. Overview**   

Alloy 201 (UNS N02201), commonly known as Nickel 201, is a low-carbon variant of commercially pure nickel. It exhibits excellent corrosion resistance, high thermal and electrical conductivity, and good mechanical properties from cryogenic to elevated temperatures. The key advantage over Nickel 200 is its superior resistance to embrittlement at temperatures above 315°C (600°F), due to a controlled carbon content (≤0.02 wt%). This makes it suitable for high-temperature applications in chemical processing, aerospace, and electronics.   

 **2. International Standards**   

Alloy 201 complies with the following international standards:   

- **ASTM Standards**: B160 (Bar & Rod), B161 (Seamless Tube), B162 (Plate/Sheet/Strip), B163 (Seamless Condenser Tubes), B725 (Welded Pipe)   

- **ASME Standards**: SB-160, SB-161, SB-162, SB-163, SB-725   

- **EN/DIN Standards**: 2.4061 (EN), NI 99.2 (DIN)   

- **Other**: UNS N02201, AWS 070 (Welding Wire)   

 **3. Chemical Composition (wt%)**   

| Element    | Min.       | Max.       | 

|------------|------------|------------| 

| Nickel (Ni) | 99.0       | Balance    | 

| Carbon (C)  | -          | 0.02       | 

| Manganese (Mn) | -       | 0.35       | 

| Iron (Fe)   | -          | 0.40       | 

| Silicon (Si) | -          | 0.35       | 

| Copper (Cu) | -          | 0.25       | 

| Sulfur (S)  | -          | 0.01       | 

 **4. Physical Properties**   

| Property                  | Value                               | 

|---------------------------|-------------------------------------| 

| Density                   | 8.89 g/cm³ (0.321 lb/in³)           | 

| Melting Point             | 1435-1446°C (2615-2635°F)           | 

| Thermal Conductivity      | 70 W/m·K (at 100°C)                 | 

| Electrical Resistivity    | 0.095 μΩ·m (at 20°C)                | 

| Coefficient of Thermal Expansion | 13.3 μm/m·°C (20-100°C)        | 

| Magnetic Permeability     | <1.05 (essentially non-magnetic)    | 

 **5. Mechanical Properties 

(Typical Annealed Condition)**   

| Property                  | Value                               | 

|---------------------------|-------------------------------------| 

| Tensile Strength          | 462 MPa (67 ksi)                    | 

| Yield Strength (0.2% Offset) | 148 MPa (21 ksi)                 | 

| Elongation (in 50 mm)     | 50%                                 | 

| Hardness (Rockwell B)     | 65 HRB                              | 

 **6. Product Forms**   

- Plate, Sheet, Strip   

- Bar, Rod, Wire   

- Seamless and Welded Tubes/Pipes   

- Forgings and Fittings  

 **7. Applications**   

- **Chemical Processing**: Equipment for handling caustic alkalis (e.g., NaOH, KOH) at high temperatures; reactors, evaporators, and piping in halogen-based processes.   

- **Aerospace**: Components exposed to high temperatures (e.g., engine parts, missile systems).   

- **Electronics**: Anodes, cathodes, and structural components in electron tubes and vacuum systems.   

- **Food & Pharmaceutical**: Heat exchangers and vessels requiring high-temperature sterilization.   

- **Energy**: Heat treatment fixtures and radiation shielding in nuclear applications.   

 **8. Key Advantages**   

- Excellent resistance to corrosion by acids, alkalis, and salts.   

- Stable microstructure at temperatures up to 600°C (1112°F).   

- Good fabricability (welding, hot/cold working).   

- Low gas content ideal for vacuum environments.   *

*9. Limitations**   

- Not recommended for strongly oxidizing environments (e.g., nitric acid).   

- Higher cost compared to standard stainless steels.   

 **10. Comparison with Nickel 200 (UNS N02200)**   

Nickel 201 is preferred over Nickel 200 for continuous service above 315°C (600°F), where the latter risks graphite-induced embrittlement due to higher carbon content (≤0.15 wt%).   ---   *This data is for reference only. Material selection should be validated for specific applications.*

Packing of Alloy 201,Nickel 201,UNS N02201

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 1625 gallon liquid totes Special package is available on request.