What is overhead welding position?

Overhead welding is performed from the underside of a joint. In overhead welding, the metal deposited tends to drop or sag on the plate, causing the bead to have a high crown. The welding flame should support the molten metal, and small welding avoids burning done from one distribute it along the joint.

Which type of polarity is used by this welding process?

Typically, electrode-positive (reversed polarity) welding results in deeper penetration. Electrode-negative (straight polarity) welding results in faster melt-off of the electrode, and therefore a faster deposition rate.

Which electrode is best for overhead position welding?

Choose the Correct Electrode The 7018 electrode was designed for this very purpose. Classed by the AWS (American Welding Society), this is the perfect choice because the 7018 has a lower content of iron powder.

What polarity is used for stick welding?

DC+ polarity
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.

What is the difference between 6010 and 7018?

E 6010 electrode can be used on painted, galvanized, and unclean surfaces, while E 7018 is used on clean or new sheet metal. E6010 is used for deep penetration welding, while E 7018 is used for welding metal that tends to crack, producing quality welds with excellent toughness and high ductility.

What polarity is used in sheet metal welding?

In general, operating on DCEP results in greater penetration, and DCEN results in reduced penetration and a reduction in dilution of the weld metal with the substrate. This is important for electrodes that are capable of being used on both DC polarities (and AC).

Is 7018 welding rod AC or DC?

The 7018 welding rods are used for pipe welding and structural steel welding and repair welding. This low-hydrogen, usually DC, all-position electrode can also be used with AC, which not many welders may know. The 7018 provides a good bead appearance and smooth, strong welds.

What is the polarity of 6011?

positive
6011 runs on AC and direct current electrode positive (DCEP), while 6010 runs only on DCEP.