Nuclear Grade Zirconium Alloy
Zirconium alloys are solid solutions of zirconium or other metals and are a common subclass trademarked as Zircloy.
Description
Zirconium has a very low thermal neutron absorption cross section, high hardness, ductility and corrosion resistance. One of the main uses of zirconium alloys is in nuclear technology, as cladding for fuel rods in nuclear reactors (especially water reactors). Typical compositions of nuclear-grade zirconium alloys are more than 95% zirconium by weight and less than 2% tin, niobium, iron, chromium, nickel, and other metals, which are added to improve mechanical properties and corrosion resistance.
Products Description
Commercial non-nuclear grade zirconium typically contains 1% to 5% hafnium, which has a neutron absorption cross section 600 times that of zirconium. Therefore, for reactor applications, hafnium must be almost completely removed (reduced to < 0.02% of the alloy).
Nuclear grade zirconium alloys contain more than 95% Zr, so most of their properties are similar to pure zirconium. Zirconium has a thermal neutron absorption cross section of 0.18 barne, much lower than common metals such as iron (2.4 barne) and nickel (4.5 barne). The compositions and major applications of common reactor grade alloys are summarized below. These alloys contain less than 0.3% iron and chromium and 0.1-0.14% oxygen.
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Chemical composition
|
Grade |
Element composition(%)< |
||||||||
|
Zr+Hf |
Hf |
Fe+Cr |
Sn |
H |
N |
C |
Nb |
O |
|
|
R60702 |
99.2 |
4.5 |
0.20 |
-- |
0.005 |
0.025 |
0.05 |
-- |
0.16 |
|
R60703 |
98 |
4.5 |
-- |
-- |
--0.005 |
0.025 |
-- |
-- |
-- |
|
R60704 |
97.5 |
4.5 |
0.20~0.40 |
1.0~2.0 |
0.005 |
0.025 |
0.05 |
-- |
0.18 |
|
R60705 |
95.5 |
4.5 |
0.2 |
-- |
0.005 |
0.025 |
0.05 |
2.0~3.0 |
0.18 |
|
R60706 |
95.5 |
4.5 |
0.2 |
-- |
0.005 |
0.025 |
0.05 |
2.0~3.0 |
0.18 |
Factory Show
FAQ
Q:How to pack the products?
A:The inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion during ocean transportation.
Q:What is your working time?
A:In general, our online service time is time: 9:00-22:00, after 22:00, we will reply to your inquiry during the next working day.
Q: What are your company's strengths?
A:Factory spot, competitive prices, excellent quality, support factory inspection, video call at any time, technical support.Simultaneously, we have participated in many international projects.
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