Mild Steel Welding Wire: 1. Mild steel copper coated welding wire 2. Suitable for CO2 gas protective welding, with stab.... Mild Steel Welding Wire (HTW-49)Conform with GB/T ER49-1Description: HTW-49 is a mild steel copper coated welding wire suitable for CO2 gas protective welding, with stable feadability, good welding seams, less spatters, and excellent welding process properties. Application: ...