Our pure zirconium UNS R60001 and zirconium alloy tube products all follow ASTM B-353 (Nuclear application) and ASTM B-653 (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 have good plasticity, moderate deformation resistance in cold worked process. The properties of cold work is close to low carbon steel. But it is difficult to lubricate and it is sticky. We need to do alramenting or oxidation treatment for drawn billets.
To obtain ideal surface quality, generally zirconium tubes are processed by cold work instead of drawing process.
Heat treatment is processed in vacuumed furnace. Vacuum degree is 1×10-2 to 1×10-3 Pa. Only by protective coating or complete dimensions, can zirconium be annealed in the air.
The intermediate annealing temperature is approx 700˚C for Zirconium Tin alloys. Recrystallization starts from 500˚C and 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.