Product Code : NI-NI03-CU-CU
Alloy 205,Nickel 205,UNS N02205is available in Bar (Round bar, Flat bar), Ribbon, Wire, Rods, Tube, Pipe, Foil, Plate, Sheet, Strip and Forging Stock.
**Product Data Sheet: Alloy 205 / Nickel 205 (UNS N02205)**
**1. Overview** Alloy 205 (UNS N02205), commercially known as Nickel 205, is a variant of commercially pure nickel with controlled magnesium (Mg) addition. This alloy maintains the excellent corrosion resistance and high thermal/electrical conductivity of pure nickel, while the magnesium addition improves its resistance to sulfur attack and enhances its weldability. Nickel 205 is particularly valued in electronic and electrical applications where specific properties are required.
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**Product Data Sheet: Alloy 205 / Nickel 205 (UNS N02205)**
**1. Overview**
Alloy 205 (UNS N02205), commercially known as Nickel 205, is a variant of commercially pure nickel with controlled magnesium (Mg) addition. This alloy maintains the excellent corrosion resistance and high thermal/electrical conductivity of pure nickel, while the magnesium addition improves its resistance to sulfur attack and enhances its weldability. Nickel 205 is particularly valued in electronic and electrical applications where specific properties are required.
**2. International Standards**
- **ASTM Standards**: B160 (Bar & Rod), B161 (Tube)
- **UNS Designation**: N02205
- **Other Specifications**: QQ-N-281 (Federal Specification)
**3. Chemical Composition (wt%)**
| Element | Min. | Max. |
|------------|------------|------------|
| Nickel (Ni) | 99.0 | Balance |
| Magnesium (Mg) | 0.01 | 0.10 |
| Carbon (C) | - | 0.15 |
| 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 | 380-480 MPa (55-70 ksi) |
| Yield Strength (0.2% Offset) | 120-240 MPa (17-35 ksi) |
| Elongation (in 50 mm) | 40-60% |
| Hardness (Rockwell B) | 55-75 HRB |
**6. Product Forms**
- Wire (primary form)
- Rod and Bar
- Strip and Sheet
- Custom fabricated components
**7. Applications**
- **Electronics**: Lead wires for electron tubes, semiconductor components
- **Electrical Engineering**: Battery components, electrical contacts
- **Glass-to-Metal Seals**: Hermetic sealing applications
- **Chemical Processing**: Equipment requiring sulfur resistance
- **Aerospace**: Electrical and electronic components
**8. Key Advantages**
- Excellent electrical conductivity
- Good resistance to sulfur compounds
- Enhanced weldability compared to pure nickel
- Maintains ductility over wide temperature range
- Good glass-sealing characteristics
**9. Fabrication Notes**
- Readily fabricated using standard methods
- Good hot and cold working properties
- Can be welded using common techniques (TIG, MIG)
- Annealing temperature: 705-925°C (1300-1700°F)
**10. Special Characteristics**
The magnesium addition in Nickel 205 provides:
- Improved resistance to sulfur-containing environments
- Better weldability with reduced hot cracking tendency
- Enhanced high-temperature stability
**11. Corrosion Resistance**
- Excellent resistance to caustic alkalis
- Good performance in neutral and alkaline salt solutions
- Superior to pure nickel in sulfur-containing atmospheres
- Limited resistance to oxidizing acids
Packing of Alloy 205,Nickel 205,UNS N02205
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 1626 gallon liquid totes Special package is available on request.
