... flat surface,very durable 2.Material:Gr1,Gr2 3.Standard:ASTM B265.JIS H4600 ... follows:² titanium,nickel,zirconiumsheet/plate,tube/pipe,bar/rod: gr1,gr2,gr5,gr7,gr9,n4,n6² Titanium,chromium, ... nickel alloy target: round,sheet,tube, 100*40/45,80*45,60*45² Titanium ... clad copper:Tu2,sheet,bar,tube titanium foil for lantern reflectors