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Zirconium Zr705 Tube Pipe have strong affinity. They react with oxygen, hydrogen and nitrogen at about 200, 300 and 400 ℃ respectively. The reaction is rapid at higher temperature. Therefore, the melting and heat treatment should be carried out in vacuum furnace. When heat processing is carried out in the atmosphere, proper protection measures shall be taken and the operation time under high temperature shall be shortened.
CHEMICAL COMPOSITIONS (NOMINAL)
| Type | Zr+Hf | Hf | Fe+Cr | H | N | C | O | Nb |
|---|---|---|---|---|---|---|---|---|
| Zr702 | >99.2 | <4.5 | <0.2 | <0.005 | <0.025 | <0.05 | <0.16 | / |
| Zr705 | 95.5 | <4.5 | <0.2 | <0.005 | <0.025 | <0.05 | <0.18 | 2.0-3.0 |
Density: 6.51 g/cm3
Melting Point: 1852°C
Thermal Conductivity: 22 W/(m °C)
Elastic bend modulus: 99.3 GPa
Thermal Expansions: 5.4x10 /°C
PARAMETERS (STANDARD)
Executive standard: ASME SB658 / ASTM b658-07
Zirconium Zr705 Tube Pipe outer diameter 6.0-114mm
Zirconium Zr705 Tube Pipe wall thickness 0.3-8.0 mm
Zirconium Zr705 Tube Pipe length ≤ 18000mm
Zirconium Zr705 Tube Pipe Picture:
The water cooling of reactor zirconium alloys elevates requirement for their resistance to oxidation-related nodular corrosion. Furthermore, oxidative reaction of zirconium with water releases hydrogen gas, which partly diffuses into the alloy and forms zirconium hydrides. The hydrides are less dense and are weaker mechanically than the alloy; their formation results in blistering and cracking of the cladding – a phenomenon known as hydrogen embrittlement.