6010

6010 is a designation most commonly associated with the AWS E6010 shielded metal arc welding electrode. This type of electrode uses a cellulose sodium coating and is renowned for its deep, penetrating arc and fast freezing weld bead. It is frequently employed for root passes and joints in carbon steels and low-alloy steels, where strong penetration and reliable arc start are important. The electrode is typically operated with direct current electrode positive (DCEP), though some manufacturers provide variants that can be used with alternating current (AC) as well.

The AWS classification notes E6010 as a high-penetration, cellulose-coated electrode with a nominal minimum tensile strength of about 60,000 psi. The “10” in the designation reflects coating and performance characteristics specific to this class. In practice, E6010 delivers deep root penetration and a stable arc, making it suitable for welded joints that require penetrating root passes and good starting control.

Common applications include root passes for structural steel and pipe welding, as well as repairs where deep penetration is advantageous. It is valued for its ability to weld through minor surface contamination and to perform in a variety of positions, though effective results depend on proper technique, joint preparation, and adherence to a welding procedure specification. E6010 welding can be more challenging to manage than some smoother-running electrodes, and correct preheating and moisture control are important to avoid cracking in susceptible materials.

Handling and storage emphasize keeping electrodes dry and following manufacturer guidelines for drying if moisture exposure occurs. Overall, E6010 remains a versatile choice for deep-penetration SMAW work on steel substrates.