Introduction:

AWS A5.18 ER70S-6 (Non-copper coated):

Non-copper coated wire is for the GMAW of mild and high strength steels. It reduces the welding fume and protect welder fitness. increases productivity and decreases the welding cost, with the characteristics of stable arc, low splashing, high deposited efficiency, feeding stability. 

Application: Used for welding 500 MPa low alloy steel single and multi-pass welding ; also for high speed thin plates, pipe line steel welding . 
Suitable for manual welding, automatic welding and robot welding, such as oil machinery, heavy crane machinery, pressure vessels, oil-chemical vessels, ship body, bridge, construction steel structure, etc. 

AWS A5.18 ER70S-6:

Strong resistance to surface scales and oil stains on the base metal. It has lw blowhole sensitivity.

Application: Used for welding 500 MPa low alloy steel single and multi-pass welding ; also for high speed thin plates, pipe line steel welding . 
Suitable for manual welding, automatic welding and robot welding, such as oil machinery, heavy crane machinery, pressure vessels, oil-chemical vessels, ship body, bridge, construction steel structure, etc.