Since the Flux Cored Welding Wire is no protection or shielding gas flux, arc welding can be carried out in order to obtain qualified weld wire, self-shielded flux cored wire is to as slag, gas-making, the role of oxygen in steel powder and metal powder within the skin or applied to the wire surface, arc welding under the action of powder into the slag and gas, slag and gas-making play a protective effect, without additional gas.
The self-shielded flux cored wire deposition efficiency was significantly higher than the electrode, the flexibility of field welding and wind better than gas shielded arc welding, usually welding under the four winds. Because no shielding gas, suitable for outdoor or high-altitude operations, it is used for the installation site and construction sites.
 Protect the wire from the plastic weld metal toughness is generally lower than the Types Of Welding Wire used shielding gas. Since the current is mainly used to protect low-carbon steel wire welded structures should not be used for welding high-strength steel and other important structures, in addition, self-shielded wire when welding smoke larger in the narrow space work should pay attention to enhance ventilation.