Zircaloy 2 is a zirconium-based alloy known for its excellent corrosion resistance, mechanical strength, and heat transfer properties. It is primarily used in nuclear power applications, where it serves as a cladding material for fuel rods in nuclear reactors. Zircaloy 2 is highly valued for its ability to withstand the demanding conditions of nuclear reactors, including high temperatures, high radiation levels, and corrosive environments.
One of the key characteristics of Zircaloy 2 is its exceptional corrosion resistance. It demonstrates excellent resistance to corrosion in high-temperature water and steam environments, making it ideal for use in nuclear reactors.
The alloy also exhibits good resistance to general corrosion, including acids, alkalis, and saltwater. It is particularly known for its superior resistance to stress corrosion cracking, which is crucial for maintaining the integrity of nuclear fuel cladding.
The primary application of Zircaloy 2 is in the nuclear power industry, where it is widely used as cladding material for fuel rods in both pressurized water reactors (PWRs) and boiling water
reactors (BWRs). It provides a protective barrier around the nuclear fuel, preventing the release of radioactive materials and ensuring the safety and efficiency of the reactor.
Available tube product forms
Typical Applications
Typical Manufacturing Specifications
- ASTM B353
- ASTM B352
- Also individual customer specifications
Industries predominantly using this grade
Technical Data
Mechanical Properties
| Tensile Strength |
1035 MPa (150,000 psi) minimum |
| Yield Strength |
690 MPa (100,000 psi) minimum |
| Elongation |
20% minimum (in 2-inch gauge length) |
| Hardness |
HRB 90 (Typical, after solution annealing) |
Physical Properties
| Density |
9.32 g/cm³ |
| Melting Range |
1300-1350°C (2370-2460°F) |
| Thermal Conductivity |
12.4 W/m·K (at 20°C) |
| Electrical Resistivity |
1.15 μΩ·m (at 20°C) |
| Curie Temperature |
Approximately 930°C (1700°F) |
| Modulus of Elasticity |
232 GPa (33.7 x 10^6 psi) |
Chemical Composition (% by weight)
|
Element |
Min |
Max |
|
Zr |
98.5 |
- |
|
Sn |
1.2
|
1.7
|
|
Fe |
-
|
0.1
|
|
Cr |
0.05
|
0.15
|
|
Ni |
0.03
|
0.08 |
|
O |
-
|
0.18 |
|
H |
-
|
0.005 |