... smelting, non-metal smelting refining, metal analysis. Suitable for precious metals such as gold, platinum, silver, copper, iron, stainless steel, ... welding, such as word drill,horn drill welding.brass,copper,stainless steel pot and other materials hybrid welding.Melting/ ... are mainly used for the melting of steel, stainless steel, copper, brass, silver, gold, and aluminium materials, etc. 2. ...