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tantalum DescriptionCommodity Tantalum ingot Standard ASTM B364-92 Dimension Dia 70-120mm Purity 99.9% Note Ingots of normmal diameter: φ70-150mm×>L1200mm The Special sizes are available upon customer’s requirement Table 1. Chemical composition Chemistry ppm Designation Chief component Impurities maxmium Ta Nb Fe Si Ni W Mo Ti O C H N Ta1 Remainder 400 80 50 30 40 40 20 150 40 15 20 Ta2 Remainder 800 100 80 50 80 80 40 180 80 15 50 enjoy the productSpecial requirements to be agreed on by the supplier and buyer of negotiations our commitment to quality is in everything we do,from the materails we use to our manufacturing process