What does the "1" represent in the welding electrode identifier "E6016"?

In the welding electrode identifier "E6016," the "1" actually signifies the type of current for which the electrode is suitable, specifically indicating that it can be used with alternating current (AC). However, it is also closely associated with the penetration characteristics of the electrode.

In this identifier, the first digit (6) refers to the minimum tensile strength of the weld metal (60,000 psi), while the second digit (0) relates to the position in which the electrode can be utilized (flat, horizontal, vertical, and overhead). The "1" indicates that the electrode can be used in various welding positions, though primarily for the flat position, it implies a level of versatility. The last digit (6) reflects its special characteristics, notably that this type of electrode can be used with AC and is meant for medium penetration.

Understanding these specifics is essential, as it helps welders select the appropriate electrode based on the welding conditions, position, and power source to achieve optimal results.