Heavy coated, rutile type high-efficiency electrode having a weld metal recovery of approx. 180 %. It is suited to produce long fillet welds and economically filling-up large weld sections. The core wire diameters, deviating from standart diameter, are so calculated as to produce definite throat thickness (a=3 to 6 mm). Relatively low current intensities and short burn-off times. Exhibits good welding properties.