Our pure zirconium UNS R60001 and zirconium alloy tube products all follow ASTM B353 (Nuclear application) and ASTM B653 (Non-nuclear application), such as Zr702 (R60702), Zr705 (R60705), Zr-2 (UNS R60802), Zr-4 (UNS R60804), Zr-2.5Nb (UNS R60901, UNS R60904), Zr-1Nb tube and other alloys' tube.
Zirconium rod and tubes are produced by cold rolling, rotary swaging, spinning, drawing and cold worked techniques. Zirconium and its alloys are good in plasticity and moderate deformation resistance in cold worked process. The cold-work properties of zirconium rod and tubes are close to low carbon steel.Since it is not lubricative and sticky, alramenting or oxidation treatment should be done for drawn billets.
To obtain ideal surface quality, zirconium tubes are processed by cold work instead of drawing process.
Heat treatment is processed in vacuum furnace. Vacuum degree is 1×10-2 to 1×10-3 Pa. Only by protective coating and whole oxidation layer surface, can zirconium be annealed in the air quickly.
The intermediate annealing temperature is approx 700˚C for zirconium tin alloys. Recrystallization starts from 500˚C and the alloy becomes rough at 600˚C.
Stress relief annealing is 450 to 500˚C for the finished zirconium tubes. Recrystallization annealing temperature is 530 to 600˚C.