Which combination correctly describes E6010?

Which combination correctly describes E6010?

• A. Deep penetration, DC reverse polarity only
• B. Shallow penetration, DC straight polarity only
• C. Moderate penetration, AC
• D. Deep penetration, DC straight polarity only

Answer: (A)

E6010 is a deep-penetration, cellulose-based electrode whose arc and flux are optimized for directing heat into the base metal. When you weld with direct current reverse polarity (electrode positive), most of the heat goes into the workpiece, producing very deep root penetration and a narrow, well-defined bead. This makes it ideal for root passes in joints with some contamination or imperfect fit-up, where penetrating the base metal matters most. Using DC straight polarity (electrode negative) shifts heat toward the electrode and tends to produce shallower penetration and a different bead profile, which is not what this electrode is designed for. AC is not the preferred method for E6010 because the arc stability and penetration characteristics aren’t as reliable as with DC reverse polarity. So the best description is deep penetration with DC reverse polarity.

E6010 is a deep-penetration, cellulose-based electrode whose arc and flux are optimized for directing heat into the base metal. When you weld with direct current reverse polarity (electrode positive), most of the heat goes into the workpiece, producing very deep root penetration and a narrow, well-defined bead. This makes it ideal for root passes in joints with some contamination or imperfect fit-up, where penetrating the base metal matters most.

Using DC straight polarity (electrode negative) shifts heat toward the electrode and tends to produce shallower penetration and a different bead profile, which is not what this electrode is designed for. AC is not the preferred method for E6010 because the arc stability and penetration characteristics aren’t as reliable as with DC reverse polarity.

So the best description is deep penetration with DC reverse polarity.