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Zirconium Zr 702 Tube/Pipe
- Description
-
Material Grade: Zirconium 702 Tube, UNS R 60702, Zr702, Zr704, Zr705
Standard Specification: ASTM B523, ASME SB- 523, ASTM B523(Zr702, Zr704)
Tube/Pipe Shapes: Seamless and Welded
Description: Zr 702 is a zirconium grade characterized by immunity to stress corrosion cracking and high resistance to pitting and crevice corrosion. The grade has very good corrosion resistance in most organic acids, excellent corrosion resistance in mineral acids, good corrosion resistance in strong alkalis and moderate mechanical strength.
Chemical Components (wt%):
Grade
Zr + Hf, min
Hf
Fe+Cr
Tin(Sn)
H
N
C
Nb
O
Zr702
99.2
4.5
0.2
....
0.005
0.025
0.05
...
0.16
Zr704
97.5
4.5
0.2~0.4
1.0~2.0
0.005
0.025
0.05
...
0.18
Zr705
95.5
4.5
0.2
....
0.005
0.025
0.05
2.0-3.0
0.18
Mechanical Properties:
Grade
Tensile strength,Mpa, min
Yield strength, MPa min
Elongation in 2 in. or 50 mm, min, % A
Bend Test Radius
Zr702
380
205
16
--
Zr704
415
240
14
--
Zr705
550
380
16
--
Applications:
Zirconium 702 tubing is resistant in most organic acids and mineral acids. Typical applications for seamless zirconium tubing are as heat exchangers, coolers, condensers and piping systems in the production of urea, acetic acid, formic acid, nitric acid and methyl methacrylate.
Physical Properties: Density: 6.5g/cm3
Melting point: 1852°C; Thermal conductivity: 22 W/(m °C)
Elastic bending modulus: 99.3 GPa; Thermal expansion: 5.4x10-6 /°C
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