6013 is suitable for downhill, but in general, downhill welding creates a little bit weaker weld, because the shallower penetration, but on thin material, this can be enough. Downhill welding is also faster, than uphill, just set the amps and welding speed correctly, and pay attention to slag inclusions.
Que bien mi amigo te felicito, soy soldador con tus videos adquiero más conocimientos y mis trabajos me salen una belleza, saludos y un fuerte abrazo desde Quito-Ecuador
