Introducing OK Autrod 12.66, a copper-coated Mn-Si-alloyed solid wire designed for the mechanised downhill GMAW of pipelines in materials such as API 5L grade 52 to 70. Its versatility is evident in its main application areas, which include pipelines, compressor stations, and associated work in the oil and gas industries. This EN 440 G4Si1 type wire, with its improved impurity level, is specifically tailored to meet the special requirements of this industry. It is supplied in 1Kg and 5Kg wire spools for mechanised pipe welding systems and can be used with both Ar/CO² mixed gas and pure CO² shielding gas.