... 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 ... ) x 50~450mm( Width ) x 100~1000mm( Length )Purity: 99.95%,99.99% and 9.999%Standard: ASTM B760 or GB3875 ...