Electron Beam Welding (EBW) is a fusion welding that produces a weld by impinging a beam of high energy electrons to heat the weld joint. The electrons are elementary particles, atoms with a negative charge and a mass of very small. The increase of electrons in a high energy state and accelerated from about 30 to 70 percent of the speed of light provides the energy to heat the weld.

A function of Electron Beam Welding (EBW) gun like a television picture tube. The main difference is that a television picture tube continues to sweep the surface of a fluorescent screen with an electron beam of low intensity to produce an image. Electron Beam Welding (EBW) gun uses an electron beam of high intensity for a weld joint objective. The welding joint becomes the electron beam at the entrance of the heat required to weld a merger.

The electron beam is always generated in a vacuum. Using specially designed holes to separate a series of rooms on different levels of vacuum can weld under normal conditions and nonvacuum. Although vacuum welding offers the ultimate in purity and depth of the weld width.