... 610-1996(GRADE DESIGNATION 99.90) MARK:SN99.90 COMMODITY: high purity tin ingots 99.99% STANDARD:BS EN 610-1996(GRADE ... 99.99 Sn 99.99 1.High purity(Sn99.99 Sn99.95 Sn99.90), excellent weldability, good infiltration. 2.Clean, beautiful.After ... welding, insulation, high resistance, low ionic contamination, PCB board ...