Tungsten Wire Filaments

Tungsten has the highest melting point and lowest vapor pressure of all metals, and at the temperatures over 1650°C has the highest tensile strength. It has excellent corrosion resistance and is attacked only slightly by most mineral acids.

Tungsten is the most useful material used in vacuum evaporation technique, due to its special properties and cost factor.

Properties of Tungsten

Chemical symbol: W
Atomic Radius: 2.02Å
Atomic Volume, cm3/mol: 9.53
Covalent Radius: 1.3Å
Crystal Structure: Body centered cube
Number of Electron (with no charge): 74
Atomic Number of Protons: 74
Number of Neutrons (most common/stable nuclide): 110
Ionic Radius: 0.62Å
Cross Section: 18.5 barns ± 0.5
V-Shaped Filaments

High purity, vacuum grade tungsten wire 0.02" (0.50mm) diameter, V-shaped filaments ½" (12.7mm) deep, with a bottom angle of 45°, either single wire or triple strand.

Cat. # Overall Length No. Strand V- Opening Qty
73840 3" (76.2mm) Single ¾" (19mm) 10/pk
73842 3" (76.2mm) Triple ⅝" (16mm) 10/pk
73844 3½"(88.9mm) Triple ¾" (19mm) 10/pk
Coiled Filaments

Single or 3-strand coiled tungsten filaments, 0.5 mm (0.002") diameter wires.

Cat # Description Pack Price Quote Quantity
Cat #: 73840 Description: V-Shaped Tungsten Filaments Single, 3/4" opening Pack: 10 Pack Price: $18.00 Add to Quote:
Cat #: 73842 Description: V-Shaped Tungsten Filaments Triple, 5/8" opening Pack: 10 Pack Price: $40.00 Add to Quote:
Cat #: 73844 Description: V-Shaped Tungsten Filaments Triple, 3/4" opening Pack: 10 Pack Price: $32.00 Add to Quote:
Cat #: 73938-1 Description: Coiled Filament Horizontal Helix single strand Pack: 5 Pack Price: $28.00 Add to Quote:
Cat #: 73938-3 Description: Coiled Filament Horizontal Helix triple strand Pack: 5 Pack Price: $33.00 Add to Quote:
Cat #: 73939-1 Description: Coiled Filament Horizontal Helix triple strand Pack: 5 Pack Price: $44.00 Add to Quote: