Introduction
Nickel 201 alloy is a commercially pure wrought alloy having properties similar to that of nickel 200 alloy, but with a lower carbon content to avoid embrittlement by inter-granular carbon at high temperatures.
It is resistant to acids and alkalis, and dry gases at room temperature. It is also resistant to mineral acids depending on the temperature and concentration of the solution.
The following section will discuss in detail about nickel 201 alloy.
Chemical Composition
The chemical composition nickel 201 alloy is outlined in the following table.
Chemical Composition
The chemical composition nickel 201 alloy is outlined in the following table.
| Element |
Content (%) |
| Nickel, Ni |
≥ 99 |
| Iron, Fe |
≤ 0.4 |
| Manganese, Mn |
≤ 0.35 |
| Silicon, Si |
≤ 0.35 |
| Copper, Cu |
≤ 0.25 |
| Carbon, C |
≤ 0.020 |
| Sulfur, S |
≤ 0.010 |
Physical Properties
The following table shows the physical properties of nickel 201 alloy.
| Properties |
Metric |
Imperial |
| Density |
8.89 g/cm3 |
0.321 lb/in3 |
| Melting point |
1435 – 1446°C |
2615 – 2635°F |
Mechanical Properties
The mechanical properties of nickel 201 alloy are displayed in the following table.
| Properties |
Metric |
| Tensile strength (annealed) |
403 MPa |
| Yield strength (annealed) |
103 MPa |
| Elongation at break (annealed prior to test) |
50% |
Thermal Properties
The thermal properties of nickel 201 alloy are given in the following table
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@20-100°C/68-212°F) |
13.1 µm/m°C |
7.28 µin/in°F |
| Thermal conductivity |
79.3 W/mK |
550 BTU.in/hrft².°F |
Other Designation
Other designations that are equivalent to nickel 201 alloy include the following:
ASME SB-160 – SB 163
SAE AMS 5553
DIN 17740
DIN 17750 – 17754
BS 3072-3076
ASTM B 160 – B 163
ASTM B 725
ASTM B730
Applications
The following are the list of applications of nickel 201 alloy:
Caustic evaporators
Combustion boats
Electronic components
Plater bars.