| E6010 | Cellulose sodium | 60 ksi minimum tensile strength | DCEP (electrode positive) | All positions | Deep penetration; forceful arc; fast-freezing slag | Root passes, pipe welding, and work on some less-than-clean steel surfaces | Requires a compatible DCEP power source and good arc control. Its forceful arc can be less forgiving for beginners. |
| E6011 | Cellulose potassium | 60 ksi minimum tensile strength | AC or DCEP, as specified for the electrode | All positions | Deep penetration; forceful arc; fast-freezing slag | Maintenance, repair, and jobs where AC operation or work on less-than-clean steel is needed | Check the product data for permitted current and polarity. The arc is typically more aggressive than that of a general-purpose low-penetration rod. |
| E6013 | Rutile, commonly potassium-based | 60 ksi minimum tensile strength | AC or DC; exact polarity depends on the electrode product | All positions; confirm diameter and product guidance | Smoother, relatively soft arc; moderate-to-light penetration; easy slag removal is common | General-purpose fabrication, sheet metal, and light repair on clean material | Often selected for ease of use and appearance. It may be less suitable than a deep-penetrating electrode where joint fit-up or heavy contamination is a concern. |
| E7018 | Low-hydrogen iron powder | 70 ksi minimum tensile strength | Commonly DCEP; some products are designed for AC as well | All positions, subject to diameter and product instructions | Medium penetration; smooth arc; low-hydrogen weld-metal characteristics when handled correctly | Structural fabrication, general-purpose steel construction, and applications with specified mechanical-property requirements | Requires proper storage and handling to control moisture pickup. Confirm the required strength, impact properties, and applicable welding procedure. |
| E7024 | Iron powder, typically rutile-based | 70 ksi minimum tensile strength | AC or DC, depending on the electrode product | Primarily flat and horizontal fillet positions | High deposition rate; produces a large weld bead; designed for fast welding in suitable positions | Production welding of flat plate and horizontal fillet welds | Useful when deposition rate is a priority, but its position limitations make it unsuitable for many vertical or overhead welds. |