Harris RG-45 Steel Welding Rod - W1060 steel alloy for gas torch is a general purpose, copper coated, low carbon steel rod for oxyfuel gas welding of mild steel.
Harris ER70S-2 mild steel TIG welding wire is a premium, multiple deoxidized, wire. It produces high quality welds in most grades of carbon steels. E70S-2 is a triple deoxidized wire which provides defect free weld deposits when properly used on most carbon steels. It is used especially for pipe welding. ER70S-2 Conforms to AWS A5.18 ER70S-2.
Harris advises these should not be interchanged for each other.