Zirconium 2.5% niobium

  • Zirconium Zr 705 alloy
  • Zirconium alloy 705

Product Details

Zr-2.5Nb Standard

Our Zr-2.5Nb sheet, Zr-2.5Nb bar, Zr-2.5Nb foil, Zr-2.5Nb wire, Zr-2.5Nb tube, Zr-2.5Nb target and Zr-2.5Nb parts all follow ASTM B351, ASTM B352 and ASTM B353.



Zr-2.5Nb Properties

The corrosion resistance of Zr-2.5Nb alloy has a great relationship with heat treatment. The corrosion rate of Zr-2.5 Nb alloy with quenching aging is higher than that of Zr-2 alloy. It is higher than that in CO2 and air. Zr-2.5Nb is little different from Zr-2 in the medium of water after long-term corrosion (i.e., 30 years) (i.e., the corrosion between 316-400˚C).The corrosion resistance of Zr-2.5Nb (including cold - processing state) is better than that of Zr-2 as the corrosion temperature increases.

Cold Processing Zr-2.5Nb Alloys Corrosion Property
Extrusion Temperature/˚C Annealing Temperature/˚C Cold Process Rate/% Corrosion Rate After Transition/mg·dm-2·d-1
840 575 23 0.10
840 700 23 0.12
Quenching-Cold Processing-Aging Zr-2.5Nb Alloys Corrosion Property
Quenching Temperature/˚C Cold Process Rate/% 500 Aging/h Corrosion Rate After Transition/mg·dm-2·d-1
316˚C Water 360˚C Water 400˚C Steam
880 0 6 0.50 1.38 1.44
880 10 6 0.12 0.40 0.72
880 20 6 0.05 0.20 0.26
880 30 6 0.03 0.10 0.29
880 0 24 0.05 0.43 3.3
880 10 24 0.04 0.39 0.75
880 20 24 0.02 0.13 0.45
880 30 24 - 0.08 0.29
Zr-2.5Nb Alloy Absorbed Hydrogen Quantity under Irradiation
Alloy Metallurgical State Absorbed Hydrogen Weight Increment Absorbed Hydrogen Quantity 
Distant Flux Near Flux 1020
Neutron/cm2		 1.7X1021
Neutron/cm2		 Distant Flux Near Flux 1020
Neutron/cm2		 1.7X1021
Neutron/cm2
Zr-2.5Nb quenching,20%cold process, aging(acid wash) - 0.1 - 0.2 - 3 - 3
quenching,20%cold process, aging(prefilming) - 0.1 0 0.6 0 3 0 14
quenching,30%cold process, aging(acid wash) - - - 0.3 - - - 5
quenching,30%cold process, aging(prefilming) - 0 - 0.2 - 0 - 5
annealing,30%cold process, aging(acid wash) - - - 0.3 - - - 3
annealing,20%cold process, aging(prefilming) - 0 - 0.3 - 0 - 5

Zr-2.5Nb Application

Nuclear Reactor Zirconium Alloys Application
Zirconium Alloy Type of Reactor Application
Zr-2.5Nb PHWR, RBMK pressure tube, process tube, element box, spacer ring

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