Gas metal arc welding

Submerged arc welding

Gas tungsten arc welding

Flux coated arc welding

$$GTAW$$

Resistance spot welding

Friction welding

$$SAW$$

Decreases with increase in gap between the two joining surfaces

Increases with increase in gap between the two joining surfaces

Decreases up to certain gap between the two joining surfaces beyond which it increases

Increases up to certain gap between the two joining surfaces beyond which it decreases

$${3500^0}C$$

$${3200^0}C$$

$${2900^0}C$$

$${2550^0}C$$