AWS A5.18 ER70S-6 DUROARC ER70S-6 is copper coated low carbon all-positional mig welding wire. This wire has excellent welding performance with a stable arc and less spatter, ER70S-6 is the most common wire for welding mild and medium strength steels. Suitable for use with Straight CO2 or Argon/C02 Mix shielding gas for general Mig welding. Available in 2 spool sizes - 5kg and 15kg