Tungsten wire/filament/strand/screw:

Diameter: 0.3-3mm

Grade   Tungsten content (%)      type       usage

WAL1   >=99.92       T     Manufacturing wire of high color lamp, wire of shockproof lamp and double-spiral wire

              L     Manufacturing wire of incandescent lamp, cathode of transmitting tube, hyperthermia electrode and reaming tungsten wire

              W   Manufacturing folding heating cord of electron tube

WAL2   >=99.92       T     Manufacturing wire of fluorescent lamp

              L     Manufacturing heating cord of electron tube, wire of incandescent lamp, and reaming tungsten wire

              W   Manufacturing folding heating cord of electron tube, grid wire and cathode

W1 >=99.95       -      Manufacturing reaming tungsten wire and heating components

W2 >=99.92       -      Manufacturing grid side rod of electron tube and reaming tungsten wire

Sort       Number of strands   Diameter     Difference between 2 feet mm    Inside diameter tolerance