What are Active Fluxes in Welding?

Active fluxes are welding consumables that produce changes in weld metal chemistry when welding is changed. Active fluxes are restricted to single or minimal multi-pass welding.

Active fluxes can be used for a variety of welding processes, including:

shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), and plasma arc welding (PAW). The most common active fluxes contain magnesium, calcium, zirconium, and/or titanium.

When using active fluxes, it is important to keep the following in mind:

Active fluxes are only effective for limited multi-pass welding.
Active fluxes can produce changes in weld metal chemistry.
Active fluxes can be used for a variety of welding processes.
The most common active fluxes contain magnesium, calcium, zirconium, and/or titanium.

What is the difference between passive and active flux?

Passive fluxes do not produce changes in weld metal chemistry when welding is changed, whereas active fluxes do. Passive fluxes can be used for a variety of welding processes, including SMAW, GTAW, and PAW. The most common passive fluxes contain silicon, manganese, and/or aluminum.

What is an active SAW flux?

An active SAW flux is a welding consumable that produces changes in weld metal chemistry when welding is changed. Active SAW fluxes are restricted to single or minimal multi-pass welding.

What is fused flux?

Fused flux is a welding consumable that produces changes in weld metal chemistry when welding is changed. Fused fluxes are restricted to single or minimal multi-pass welding.