This type of welding steel-Lo are similar to the steps of the white cast iron welding. That is, the steps of which cannot be avoided is to heat the metal workpieces before welding it every time.
This type of welding cast iron Similar to the steps of the white cast iron welding is the process of connecting that can not be avoided is to heat the metal parts before welding time.
Cast welding type. Similar to the process of welding steel casting white, i.e., the step of welding can not be avoided is the heating of metal before welding target every time.