Advanced Metals
Zirconium 705
Zirconium 705 (Zr705) is alloyed with Niobium 2.0% to 3.0%. Zr705 has similar corrosion resistance but a much higher strength comparing to Zr702. Zr705 has higher formability than Zr702 because it is easier to press into shape in the processing due to its high tensile strength.
Zirconium 705 has good corrosion resistance and mechanical properties to acid, alkali and salt, especially in high temperature and pressure water and steam. The most prominent is, a nascent oxide protective layer will grow when before layer stripped off. There is no significant corrosion turning point for Zr705.
When corrosion conditions permit, Zr705 is more economical to be used as shell for pressure vessel construction, because its higher strength makes thinner wall thickness design allowable, which can greatly reduce the material consumption.
Chemical composition (wt%, max.)
|
Grade |
UNS |
Zr+Hf |
Hf |
Fe+Cr |
Nb |
H |
N |
C |
O |
|
Zr705 |
R60705 |
≥95.5 |
4.5 |
0.2 |
2.0-3.0 |
0.005 |
0.025 |
0.05 |
0.18 |
Mechanical properties
Grade
Condition
Tensile strength
Yield strength
Elongation in 50 mm
Zr705
Annealed
550
380
16
(MPa, min.)
(MPa, min.)
(%, min.)
Available forms
● Ingot
● Tube and pipe
● Forged ring, disc
● Rod and bar
● Plate and sheet
● Strip and foil
● Wire, welding wire
● Pipe fittings
● Fasteners
● Custom-made
Specification
▲ ASTM B493/493M - Forging
▲ ASTM B550/550M - Rod, wire
▲ ASTM B551/551M - Plate, sheet
▲ ASTM B658/B658M - Tube, pipe
▲ ASTM B523/B523M - Tube, pipe
▲ ASTM B653 / B653M - Pipe fittings
▲ AWS A5.24/A5.24M - Welding wire
▲ ASTM B898 - Clad metal
Characteristics of Zirconium 705
High ductility
High resistance to strong acid and alkaline solutions
Highest strength among typical Zirconium alloys
Typical application
Chemical Processing Industry
Sea Water
Water Desalination
Petrochemical
