Pure Tantalum Workpiece Grade:Ta1,Ta2 Material:Tantalum Standard:ASTM B 708-98 Different sizes are availabe Pure Tantalum WorkpieceGrade:Ta1,Ta2Material:TantalumStandard:ASTM B 708-98Different sizes are availabetechnology parameterGrade3N, 3N5, 4N, with Ta 99.95%minRecrystallization 95%minGrain sizeASTM B708-98Surface finishAccording to your requirementFlatness 0.1mm or 0.15% maxTolerance +/-0. ...