Basic Information of Zr704 Zirconium Alloy Wire
Chemical composition and standards
Grade: zr704 (Compliant with the ASTM R60704 standard ) is a nuclear-level zircalloy, the content of the micro-elements:Sn 1.2-1.7%,Fe 0.18-0.24%,Cr 0.07-0.13%,O≤0.003%.
Purity: 97.5%Zr+Hf(4.5Max)+Tin1.0-2.0+Fe+Cr0.2-0.4--Zr+Hf+Tin+Fe+Cr, the impurities content should strictly controlled to ensure the safety of nuclear application.
Mechanical property
Strength: Tensile Strength: ≥380MPa,Yield Strength: ≥205MPa,Elongation: ≥16%
High-temperature property: Melting point: 1852℃. Stable mechanical property under high-temperature and excellent an-creep deformation.
Decay-resistance
Anti acid and alkali resistance: Extremely low corrosion rate in strong acid(hydrochloric acid, sulfuric acid etc)environment(10%boiling hydrochloric ≤0.25mm/a), and the property of alkali resistance very close to nickel.
Environmental suitability: High-temperature water proof, suitable for the nuclear key components like cladding.
Application
Nuclear industry: Nuclear reactor cladding, the pressure pipe components of reactor pile.
Chemical equipment: Medium environment with high-temperature and high-pressure causticity ( heat-exchanger, valve etc.)
Processing and welding
Welding procedure: GTAW with argon≥99.99% to ward off the oxide.
Forging performance: Forging ratio≥3:1, grain size with ASTM 7-8,density ≥6.52g/cm³
Summary
| Catagory | Items | Detailed Information | Comments |
| Specification & Dimension | Form | 3Straight Wire,Coil Wire | Fefer to the general process technology of zirconium wire(Cold Drawing) |
| Diameter Range |
0.1-8.0mm for coil wire Regular 1.6mm, 2.4mm, 3.0mm etc for straight wire |
Refer to the common specifications of the zirconium wire of the industry | |
| Surface Treatment | Acid pockling/bright surface/Mirror Surface/Black skin surface | Refer to the general surface treatment standard of the zirconium wire | |
| Chemical Composition(%) | Main Alloy Content | Nb: 2.5-3.0% | the content of 2.5-3% of Nb to promote the mechanical property |
| Other Content | Fe, Sn etc impurities | Tiny content of Sn and Fe etc impurities | |
| Matrix | Zr | Balance is zirconium and trace impurity | |
| UNS No | R60704 | / |
Conclusion
As the core advantages of zr704 wire, high-purity, nuclear-level decay resistance and high-temperature are the key factors to be the nuclear and chemical industrial material.
Monica
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