Corrosion Resistant Pure Nickel
NAS Ni201 (UNS N02201) - Nickel 201
Our pure nickel NAS Ni201 provides superior corrosion resistance for such substances as caustic soda and chlorine gas. It plays an important role in caustic soda production equipment used for the diaphragm cell process. Nippon Yakin supplies this product in plate, sheet and strip forms.
Coil
Sheet
Plate
Designation / Standard
| Nippon Yakin Grade | ASTM B162 | EN | JIS H4551 |
|---|---|---|---|
| NAS Ni201 | UNS N02201 | 2.4068 | NW 2201 |
Chemical Composition
NW 2201
| C | Si | Mn | S | Ni | Cu | Fe | |
|---|---|---|---|---|---|---|---|
| Min | ― | ― | ― | ― | 99.0 | ― | ― |
| Max | 0.02 | 0.3 | 0.3 | 0.01 | ― | 4.60 | 0.4 |
UNS N02201
| C | Si | Mn | S | Ni | Cu | Fe | |
|---|---|---|---|---|---|---|---|
| Min | ― | ― | ― | ― | 99.0 | ― | ― |
| Max | 0.02 | 0.35 | 0.35 | 0.01 | ― | 0.25 | 0.40 |
Physical Properties
| Specific heat (J/kg･K) | 456 | |
| Specific resistivity (μΩ･cm) | 9.5 | |
| Thermal conductivity (W/m･K) | 60.7 | |
| Coefficient of thermal expansion (10-6/℃) | 21–93℃ | 13.3 |
| 21–260℃ | 14.2 | |
| 21–538℃ | 15.3 | |
| 21–816℃ | 16.2 | |
| 21–1093℃ | 17.1 | |
| Young's modulus (MPa) | 20.6 x 104 | |
| Modulus of rigidity (MPa) | 7.7 x 104 | |
| Poisson's ratio | 0.28 | |
| Curie point (℃) | 360 | |
| Melting point (℃) | 1433-1444 | |
Mechanical Properties
NW 2201 Annealing
| Thickness (mm) |
0.2% Proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
|---|---|---|---|
| ≤ 1.2 | ≥ 80 | ≥ 345 | ≥ 30 |
| ≤ 1.2-2.7 | ≥ 80 | ≥ 345 | ≥ 35 |
| ≥ 2.7 | ≥ 80 | ≥ 345 | ≥ 40 |
NW 2201 As hot-rolled
| Thickness (mm) |
0.2% Proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
|---|---|---|---|
| ≥ 1.5 | ≥ 85 | ≥ 350 | ≥ 30 |
UNS N02201 Annealing
| Thickness (mm) |
0.2% Proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
|---|---|---|---|
| ― | ≥ 80 | ≥ 345 | ≥ 40 |
Corrosion Resistance
Base Resistance
NAS Ni201 provides excellent resistance against bases.
| Base | Testing temp. (℃) | Concentration (wt%) | Corrosion rate (mm/y) | |
|---|---|---|---|---|
| NAS Ni201 (UNS N02201) |
SUS 304 (UNS S30400) |
|||
| Sodium hydroxide | Boiling | 20 | ＜0.01 | 0.01 |
| 40 | 0.02 | 2.77 | ||
| 60 | 0.03 | 13.3 | ||
24-hour immersion test
Acid Resistance
| Type of acid | Test temperature (℃) | Concentration (wt%) | Corrosion rate [mm/y] | |
|---|---|---|---|---|
| NAS Ni201 (UNS N02201) |
SUS 316L (UNS S31603) |
|||
| Sulfuric acid | 80 | 5 | 1.01 | 1.67 |
| 10 | 1.15 | 4.69 | ||
| 20 | 1.86 | 71.9 | ||
| 40 | 3.83 | 765 | ||
| 60 | 13.7 | 704 | ||
| 80 | 0.79 | 33.7 | ||
| Boiling | 5 | 2.24 | 8.19 | |
| 10 | 3.87 | 24.6 | ||
| 20 | 6.10 | 179 | ||
| 40 | 25.8 | 3129 | ||
| Hydrochloric acid | 80 | 0.1 | 0.99 | 0.02 |
| 1 | 7.28 | 2.73 | ||
| 2 | 13.4 | 6.75 | ||
| 3 | 15.9 | 14.9 | ||
| Boiling | 0.1 | 1.07 | 0.01 | |
| 1 | 15.9 | 8.86 | ||
| 2 | 29.6 | 27.5 | ||
| 3 | 48.1 | 76.6 | ||
| Hydrofluoric acid | 80 | 0.1 | 0.36 | 0.50 |
| 1 | 0.57 | 14.5 | ||
| 2 | 0.90 | 35.4 | ||
| 3 | 0.99 | 54.1 | ||
| Nitric acid | Boiling | 20 | 9946 | 0.02 |
| 40 | ＞10000 | 0.05 | ||
| 60 | ＞10000 | 0.17 | ||
| Phosphoric acid | Boiling | 20 | 3.52 | 0.04 |
| 40 | 6.96 | 0.25 | ||
| 60 | 13.8 | 0.56 | ||
| 80 | 72.50 | 25.0 | ||
24-hour immersion test
Workability
The pure nickel content gives NAS Ni201 a low workability, making it suited for harsh cold working techniques such as spinning and coiling.
