Molybdenum wire is a very high strength wire with tensile strength in excess of 275,000psi. it has very high melting and vaporization temperatures, 4,757°F (2,625°C) and 10,040°F (5,560°C). Because of its high working temperatures, the EDM craters left on the wire`s surface are very small compared to those left on a brass-based wire and therefore will not flush as efficiently.
Molybdenum Wire Cut EDM is often used in the small, (0.006 to 0.004"), and fine, (<0.004"), diameters to meet blueprint requirements of narrow kerf and near-sharp, inside corner radii. Because of its high tensile strength, molybdenum wire aids
in maintaining excellent wall straightness and reducing the number of wire-breaks common with many small and fine brass wires.
In special cases, typically in medical and military applications, there can be no copper or zinc contamination of the cutting surface. This criteria eliminates all copper-family wires and forces the use of a molybdenum or tungsten wire.