Abstract Cold metal transfer (CMT) welding technique was used in the manufacturing of hypoeutectic carbide-type Co-based Stellite 12 hardfacings on martensitic stainless steel. It discovered that CMT process is capable producing relatively thick (> 2.5 mm) low diluted single-layer coatings with cored wire without cracks and pores. These were investigated using microscopy (optical scanning el...