Zirconium / Zr 702
Zirconium Zr 702 is used widely in many industries for process equipment. Major applications include pressure vessels, heat exchangers, piping, tanks, shafts, mixers, and other mechanical equipment; valves; pumps; spargers; trays; and tower packing. Zirconium has a passivating oxide layer (ZrO2), which renews itself on contact with aqueous media keep telling yourself. Among other advantages, features zirconium Zr702 resistance to almost all organic acids, mineral acids and alkaline solutions. Zirconium 702 is good for welding and fully recyclable. At low temperatures, it is also very ductile.
Material Data Sheet
Material Designation Zr 702
DIN/EN Zirkonium
UNS R 60702
VdTÜV Data Sheet 480
Main fields of application of Zr 702
Zr702 zirconium is used in chemical plants in valves, pipes, heat exchangers and pumps. These systems are, for example, apparatus for the production of acetic acid, hydrochloric acid or urea. Even in the medical field Zr702 is used because it is biocompatible and shows no toxic effects. Another application of zirconium 702 is the nuclear technology.
XOT metals specializes in manufacturing Unalloyed zirconium (Zr 702) products.
ASTM Standard Grade R60702 Shape Standard Type Alloys Zr 702 Forging ASTM B 493 Grade R60702 Unalloyed zirconium Zr 702 Bar/Rod/Wire ASTM B 550 Grade R60702 Unalloyed zirconium Zr 702 Sheet/Strip/Plate ASTM B 551 Grade R60702 Unalloyed zirconium Zr 702 Seamless and Welded Tube ASTM B 523 Grade R60702 Unalloyed zirconium Zr 702 Seamless and Welded Pipe ASTM B 658 Grade R60702 Unalloyed zirconium Zr 702 Seamless and Welded Fitting ASTM B 653 Grade R60702 Unalloyed zirconium
Zirconium and Zirconium Alloy Tubes (Zr 702/ Zr 704/ Zr 705)
XOT metals is able to offer the manufacture of Zirconium tubes and Zirconium alloy tubes. Zirconium alloys have 95.5% to 99.2% Zirconium with a maximum Hafnium content of 4.5%. These alloys feature excellent resistance to corrosion. Zr702 is commercially pure Zirconium and Zr705 is alloyed Zirconium with Niobium to increase tensile and yield strength.
The main features of Zirconium tubes are:
- High heat transfer efficiency
- Very low thermal expansion
- High resistance to erosion under tension
- High resistance to localized corrosion (pitting and crevice)
- Very good resistance in most organic acids
- Exceptional corrosion resistance in mineral acids
- Good corrosion resistance in strongly alkaline mediums
- Low thermal neutron absorption
Applications of Zirconium Tubes
Nuclear Applications
The best use of Zirconium alloys tubes is for structural material for nuclear reactors due to the low thermal neutron absorption. Because zirconium has a lower absorption of neutrons than most metals it is the material of choice to improve reactor efficiency. However, in this application the low hafnium grade should be used for reactors. The alloys most used are: Zr-702 and Zr-704, having excellent corrosion resistance to high steam temperatures and good yield stress.
Chemical Processes
Used for structural material in the chemical processing industry including excellent corrosion resistance in most organic and inorganic acids, chloride solutions and alkaline mediums.In certain applications it can extend its life beyond the rest of the plant’s life.Therefore, maintenance costs are low, and downtime is minimized. It is non-toxic and biocompatible. Used in heat exchangers, evaporators, tanks, packaging, reactors, pumps, valves and pipe.
Heat exchangers, coolers and condensers
Zirconium and zirconium alloy tube are increasingly used due to its cost effectiveness over other materials thanks to its longer life, low maintenance and downtime, and improved process efficiency. Due to its excellent heat transfer properties and durability Zirconium is replacing many graphite heat exchangers.Since zirconium alloys have an inherent corrosion resistance due to its inert oxide layer it can be used to great advantage in condensers.
Piping
Used in urea, acetic acid, formic, nitric, and methyl methacrylate production systems.
Chemical Composition
| Zirconium Grade | Zr 702 | Zr 704 | Zr705 |
|---|---|---|---|
| UNS | R60702 | R60704 | R60705 |
| Zirconium + Hafnium (min) | 99.2 | 97.5 | 95.5 |
| Hafnium (max | 4.5 | 4.5 | 4.5 |
| Iron + Chromium | 0.2 max | 0.2-0.4 | 0.2 max |
| Tin | - | 1.0-2.0 | - |
| Hydrogen (max) | 0.005 | 0.005 | 0.005 |
| Nitrogen (max) | 0.025 | 0.025 | 0.025 |
| Carbon (max) | 0.05 | 0.05 | 0.05 |
| Niobium | - | - | - |
| Oxygen (max) | 0.16 | 0.18 | 0.18 |
Availability
For all stock availability of Zirconium and Zirconium Alloy Tubes (ZR 702/ ZR 704/ ZR 705) contact us.
Specificatons
Zr 702 – UNS 60702
Zr 702 – ASTM B523 / ASME SB523 / DIN 2462 D3/T3
Zr 704 – UNS 60704
Zr 705 – UNS 60705
ASTM B551