Q: I am hoping you could shed some light on a topic that seems popular on forums. Why are 6011 stick electrodes not specified or not used for root passes and pipe welding in general (other than AC pipe welding)? Do 6010 rods have better mechanical or operating properties than 6011? I know for higher strength pipe, there are higher strength XX10 rods. However, for 60,000 tensile, what is the advantage of 6010 over 6011?
Therefore, referring back to your question, it is logical that only E6010 electrodes would be specified for a more critical application such as pipe welding, and not E6011 electrodes. Note that for stick welding in general, DC+ polarity is most commonly used. It produces a good bead profile with a higher level of penetration. DC- polarity results in less penetration and a higher electrode melt-off rate. It is sometimes used, for example, on thin sheet metal in an attempt to prevent burn-through.