... forms including nut, screw, ring, wire, foil, sheet, rod, tube W-Ni-Fe alloy sheetApplications: * For producing electric light source parts ... ,components of electric vacuum; * For producing W-boats,heat shield and heat bodies in high temperature furnace ... .13-0.25)±0.001(±0.0254) >0.010-0.020 (0.25-0.51)±0.002(±0.0508) >0.20 ...