Stop in for a cup of coffee

what are you setting your heat at ??

you are not using any extension cords ....right?? you need to plug directly into a strong outlet (ask me how I know about that)

looks like you need way more heat.

This,& how's your ground connection, on the welding project.? Rust, oil /lubrication contamination/ some flat edges need a .030"-090" bevel ground ,for better penetrating. Rani/Rainy , is spot on ...