Flash welding

Once the pieces of metal reach the proper temperature, they are pressed together, effectively forge welding them together.

The upset time is critical in creating the desired mechanical properties of the finished weld.

If the upset time is too short, some of the impurities may remain in the base metal creating a defective weld.

[3] The ability of a single process to weld many different metals, with simple parameter adjustments, makes it very versatile.

Flash welding is also used in the metal building industry to increase the length of the angle iron used to fabricate joists.