... Zirconium and zirconium alloys For commercial Application (Hf ≤4.5%): UNS R60700 (Zr1): Commercially pure, Zr+Hf≥99.2 UNS R60702 (Zr3): Commercially ... alloy): Zr-1.5%Sn, Zr+Hf≥97.5 UNS R60705 (Zr5, Zirconium-Niobium alloy): Zr-2.5%Nb, Zr+Hf≥95.5, O≤0.18 ... UNS R60706 (Zirconium-Niobium alloy): Zr-2.5%Nb, Zr+Hf≥95.5, O≤0 ...