Product details:
Standard: ASTM B393-89
Dimension: Φ(25-400)mm*(3-28)mm
Material: RO4200-1, RO4210-2
Size:
circular targets: Diameter 25mm up to 400mm x Thickness 3mm up to 28mm
rectangular targets: Thickness 1mm up to 12.7mm x Width up to 600mm x Length up to 2000mm
Purity: >=99.9% or 99.95%
Table 1: technology parameter
Recrystallisation 95%min
Grain size ASTM 4 or finer
Surface finish 16Rms max. or Ra 0.4 ( RMS64 or better)
Flatness 0.1mm or 0.15% max
Tolerance +/-0.010" on all dimensions
Purity 99.99%
Table2：Chemical composition:
Chemistry PPM
Designation Chief component Impurities max
Nb Ta Si Ni W Mo Ti Fe O C H N
Nb1 Remainder 700 50 50 50 30 20 50 150 40 15 30
Nb2 Remainder 1000 80 40 100 100 40 80 180 60 15 50
