Zirconium and Zirconium Alloy Tubes (ZR 702/ ZR 704/ ZR 705)

 

Aircraft Materials 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 - - 2.0-3.0
Oxygen (max) 0.16 0.18 0.18

Tube Sizes

Diameter Wall Thickness
0.51 mm 0.71 mm 0.89 mm 1.24mm 1.65mm 2.11mm 2.77mm
mm in kg/mtr kg/mtr kg/mtr kg/mtr kg/mtr kg/mtr kg/mtr
6.35 0.250 0.061 0.082 0.099 0.13 0.159    
7.94 0.313 0.078 0.105 0.128 0.17 0.212    
9.52 0.375 0.094 0.128 0.157 0.21 0.266    
12.7 0.500 0.127 0.174 0.215 0.291 0.373 0.457  
15.87 0.625 0.16 0.22 0.273 0.371 0.48 0.594  
19.05 0.750 0.193 0.266 0.331 0.452 0.587 0.773 0.922
22.22 0.875 0.226 0.312 0.388 0.532 0.694 0.867 1.101
25.4 1.00 0.26 0.359 0.446 0.613 0.802 1.005 1.282
31.75 1.250 0.326 0.451 0.562 0.774 1.016 1.279 1.642
38.1 1.500 - 0.543 0.677 0.935 1.23 1.553 2.002

Pipe Sizes

Diameter Wall Thickness
Schd 5S Schd 10 S Schd 40S
Size Weight Size Weight Size Weight
mm in NPS mm kg/mtr mm kg/mtr mm kg/mtr
10.29 0.410 1/8 - - 1.24 0.23 1.73 0.303
13.72 0.540 1/4 - - 1.65 0.407 2.24 0.526
17.15 0.680 3/8 - - 1.65 0.523 2.31 0.701
21.34 0.840 1/2 1.65 0.665 2.11 0.83 2.77 1.052
26.67 1.050 3/4 1.65 0.844 2.11 1.06 2.87 1.397
33.4 1.320 1 1.65 1.072 2.77 1.735 3.38 2.075
42.16 1.660 1.1/4 1.65 1.367 2.77 2.232 3.56 2.811

Availability
For all stock availability of Zirconium and Zirconium Alloy Tubes (ZR 702/ ZR 704/ ZR 705)contact Sales.

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

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.