Copper Tungsten has the ability to provide stable cutting in carbide and other refractory metals. It is most widely used to machine tungsten carbide when fine surface finishes are required. Thin sheets, small diameter rods, and tubing are all 60/40 (60% Tungsten, 40% copper) composition.Plates, round bars and square bars are 70/30 (70% tungsten, 30% copper) composition.
Pure Tungsten Rods
Tungsten wire is primarily used in EDM'ing small holes through thin workpieces.It wears better than copper and brass but metal removal rates are slower.
Tungsten Carbide Tubing
Tungsten Carbide tubing is used mainly for EDM'ing holes. Tungsten carbide is a C-2 grade which has a composition of 94% tungsten and 6% cobalt. This material is extremely hard and will give you the straightest hole of any tubing used in EDM. Metal removal rates are not as good as copper and brass tubing but tungsten carbide does provide better wear resistance.
Brass Tubing
Brass tubing is used to EDM holes in a variety of materials. It will give best metal removal rates when EDM'ing different steels. However, electrode wear is usually high. Brass tubing take out which is a 70% copper/30% zinc composition. *Not recommended for high speed small hole EDM machines. (See small hole EDM drilling supplies section.)
Copper Tubing
Copper tubing is used to EDM holes in all materials. Copper gives better results against carbides than brass. Our copper tubing is alloy #102. *Not recommended for high speed small hole EDM machines. (See small hole EDM drilling supplies section.)
Molybdenum Tubing
Molybdenum, commonly called "moly", is used in EDM exclusively as an electrode material in tap disintegrators such as Cammann and Electro Arc.
