What type of welding wire is E71T-GS?

E71T-GS is a gas-free flux cored wire commonly used for welding carbon steel and low alloy steel. 

It features fast welding speed, good fusion, and high weld quality. 

This wire is suitable for welding thin plates and small parts, such as furniture, bicycles, and mechanical parts.

This wire is a kind of flux cored welding wire that don't need use any gas.