... range of 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 ... wide range of forms including nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to Standard ASTM ...