Pure Nickel
Nickel 201 (UNS N02201) — Composition, Properties & Supply
Nickel 201 (UNS N02201) is the low-carbon version of Nickel 200 (C ≤ 0.02%). It avoids grain-boundary graphitisation at elevated temperature, raising the service limit to 600 °C for high-temperature caustic and electronic applications.
What is the chemical composition of Nickel 201?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ni+Co | Ni+Co | ≥ 99.0 |
| Cu | Cu | ≤ 0.25 |
| Fe | Fe | ≤ 0.40 |
| Mn | Mn | ≤ 0.35 |
| C | C | ≤ 0.02 |
| Si | Si | ≤ 0.35 |
| S | S | ≤ 0.010 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of Nickel 201?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 345 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 80 MPa | Room temperature |
| Elongation | ≥ 40 % | Gauge length 50 mm / 4D |
| Hardness | ≤ 110 HB | Brinell / Rockwell |
What are the physical properties of Nickel 201?
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting range | 1435–1446 °C |
| Thermal conductivity | 70.2 W/m·K |
| Elastic modulus | 205 GPa |
| Maximum service temperature | 600 °C |
What are the key characteristics of Nickel 201?
- Carbon ≤ 0.02% prevents graphitisation embrittlement above 315 °C
- Service temperature limit of 600 °C
- Resists caustic alkalis and many organic compounds
- Good weldability and formability
Where is Nickel 201 used?
- High-temperature caustic concentrators
- Electronic tube cathodes and leads
- Synthetic fibre spinnerets
- High-temperature aerospace parts
- Chemical reactor linings
Which standards and specifications cover Nickel 201?
What product forms are available?
Frequently asked questions
Why is carbon limited in Nickel 201?
During long service above 315 °C, supersaturated carbon migrates to grain boundaries and precipitates as graphite, sharply reducing ductility and toughness. Holding carbon below 0.02% essentially removes this risk, allowing safe use up to 600 °C.
Need Nickel 201 bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
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