02-13-2016, 07:46 PM
Good question Ed. The color denotes the type of tungsten blend. The red one's are Thoriated tungsten which are used for welding steel. No good for aluminum. They are also slightly radioactive, so you don't want to breathe in any of the dust created while grinding them. Very low level radiation, but still.....
Do a Google search for tungsten types and you'll get an idea of what types there are, and what color goes to each type. Most of them are a mixture of different elements. Pure tungsten (green) is the old school type used for welding aluminum with a transformer based TIG welder. Not used so much anymore these days.
With your inverter based welder you can use the Lantanated tungstens for steel, aluminum, stainess, copper, etc., etc.
Do a Google search for tungsten types and you'll get an idea of what types there are, and what color goes to each type. Most of them are a mixture of different elements. Pure tungsten (green) is the old school type used for welding aluminum with a transformer based TIG welder. Not used so much anymore these days.
With your inverter based welder you can use the Lantanated tungstens for steel, aluminum, stainess, copper, etc., etc.
Willie