Electrode material, diameter, grind angle, and tip diameter (flat) vary according to each welding application. Charts and guides are available identifying amperage ratings for a variety of grind angles and tip diameters. Where available, use your welding equipment manufacturer's recommendations as a starting point. In the absence of that, the information below offers some general rules of thumb to follow and may be modified according to the specific application.
Different electrode materials offer various advantages in arc starting and electrode life. The following are the most commonly used electrode materials: