Product details:
Standard: ASTM B521-98
Dimension: Dia φ1.0-120mm
Material: RO5200, RO5400, RO5252(Ta-2.5W), RO5255(Ta-10W)
size: Diameter: φ1.0-120mm
Thickness: 0.2-5.0mm
Length: 200mm-6000mm
Standard: As per ASTM B521-98
Purity: >=99.95% or 99.99%
Table 1. Chemical composition:
Chemistry ppm
Designation Chief component Impurities max min
Ta Nb Fe Si Ni W Mo Ti O C H N
Ta1 Remainder 300 40 30 20 40 40 20 150 40 15 20
Ta2 Remainder 800 100 100 50 200 200 50 200 100 15 100
TaNb3 Remainder ＜35000 100 100 50 200 200 50 200 100 15 100
TaNb20 Remainder 170000-
230000 100 100 50 200 200 50 200 100 15 100
Ta2.5W Remainder 400 50 30 20 30000 60 20 150 50 15 60
Ta10W Remainder 400 50 30 20 110000 60 20 150 50 15 60
Table2. Permissible variations in diameter & wall thickness
Outside diameter, inch (mm) Diameter tolerance, inch(mm), +/- Permissible variation in wall thickness, %, +/-
