An excellent option for welding on medium to heavy mill scale base metal and sheet metal with 380-485 Map (55-70 ksi) yield strength, this Lincoln(R) Electric .030" SuperArc(R) L-56(R) MIG wire is ideal for automotive repair, robotic or hard automation, and structural applications. Works best on clean, oil-free, and rust-free metal. | Lincoln Electric 030" SuperArc L-56 | Size 12.5 lb