Jun 20 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Machinability
Forming
Welding
Annealing
Other Designations
Applications
Introduction
Nickel 233 alloy is a commercially pure wrought nickel alloy that exhibits excellent corrosion resistance and high electrical and thermal conductivities. However, the alloy is subjected to intergranular embrittlement by sulfur compounds above 315°C.
The following section will discuss in detail about nickel 233 alloy.
Chemical Composition
The chemical composition nickel 233 alloy is outlined in the following table.
|
Element |
Content (%) |
|
Manganese, Mn |
≤0.3 |
|
Silicon, Si |
≤0.1 |
|
Iron. Fe |
≤0.1 |
|
Copper, Cu |
≤0.1 |
|
Carbon, C |
≤0.1 |
|
Magnesium, Mg |
≤0.01-0.1 |
|
Sulfur, S |
≤0.008 |
|
Titanium, Ti |
≤0.005 |
|
Nickel, Ni |
Balance |
Physical Properties
The following table shows the physical properties of nickel 233 alloy.
|
Properties |
Metric |
Imperial |
|
Density |
8.89 g/cm3 |
0.321 lb/in3 |
|
Melting point |
1443°C |
2630°F |
Mechanical Properties
The mechanical properties of nickel 233 alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (annealed) |
650-880 MPa |
94275-127633 psi |
|
Yield strength (annealed) |
350-550 MPa |
50763-79771 psi |
|
Elongation at break (annealed prior to test) |
8-25% |
8-25% |
Thermal Properties
The thermal properties of nickel 233 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient |
10 µm/m°C |
5.5 µin/in°F |
|
Thermal conductivity |
25 W/mK |
173.3 BTU.in/hrft².°F |
Fabrication and Heat Treatment
Machinability
Nickel 233 alloy can be machined by conventional means. Rigid tools and aggressive feed rates result to good machining.
Forming
Conventional and hot forming methods are required for this alloy.
Welding
Nickel 233 alloy can be welded, soldered or brazed through conventional processes. Foreign particles are removed from the alloy prior to welding.
Annealing
Annealing of nickel 233 alloy can be performed at 2372°C (1300°F) to 3092°C (1700°F).
Other Designations
Other designations that are equivalent to nickel 233 alloy include the following:
Applications
The following are the list of applications of nickel 233 alloy:
-
Leadframes
-
Electronic components
-
Transistors
-
Transducers
-
Temperature sensors