How many common shielding gases？

Shielding gases fall into two categories—inert or semi-inert. Only two of the noble gases, helium and argon, are cost effective enough to be used in welding. These inert gases are used in gas tungsten arc welding, and also in gas metal arc welding for the welding of non-ferrous metals. Pure argon and helium are used only for some nonferrous metals. Semi-inert shielding gases, or active shield gases, include carbon dioxide, oxygen, nitrogen, and hydrogen. Most of these gases, in large quantities, would damage the weld, but when used in small, controlled quantities, can improve weld characteristics.

Guangdong Shunde Seko Machinery & Technology Co.,Ltd.www.gdseko.com

sevvice@gdseko.com
Skype:Lucy Xie,SEKO Machinery

Suggested Reading: The safety issues of the welding
Product:Tube Mills、Weld Bead Rolling Machine、Bright Annealing Machine