Stringer beads, laid parallel to the joint, are used for welding stainless steel pipe since there is less tendency toward carbide precipitation. Stringer beads are recommended for welding all carbon and low alloy pipe in the vertical-fixed position.
What is the difference between Stringer and weave beads?
A weave bead fills the joint at the EXACT same rate as stringers. As travel speed slows down, the amount of heat going into the base metal goes up. In some metals this can cause problems that can not be found by inspection after welding.
What is weave bead in welding?
“Weave bead. A type of weld bead made with transverse oscillation. See Figure (22B)”… which shows a butt joint where the bead is made with a side to side motion as forward progress along the joint was made.
What is a weld bead called?
A stringer bead is a narrow bead with only a dragging motion or light oscillation, while a weave bead is wider with more oscillation. Bevel – an angle cut or grinded at the edge of the work-piece to allow more penetration for a stronger weld.
Should you weave when MIG welding?
The general guidelines for MIG welding are whip when welding thin metal or making the first pass in a joint, circles for a both thicker materials and wider welds. Weave for vertical up and down.
What are four important points to check when running a bead?
(1) In order to weld, you must melt. (2) If the base metal is not melted, the filler metal just sticks on, and can easily be scraped off. (3) As the amperage is raised, the hotter arc not only melts more, but melts faster. (4) The cooler arc will produce some melting, if it’s kept in one place long enough.
Should you weave when stick welding?
For welding vertical up, use a push or forehand technique and tilt the top of the electrode 0 to 15 degrees away from the direction of travel. … Note that on material 1/4 inch and thinner, weaving the electrode is typically not needed because the bead will be wider than necessary.
Do you push or pull with a stick welder?
Push or pull: Here the rule is simple. “If it produces slag, you drag,” says Leisner. In other words, you drag the rod or wire when welding with a stick or flux-core wire welder. Otherwise, you push the wire with metal inert gas (MIG) welding.
How important that when you deposit the weld bead is always keep at straight?
So far you have been learning a good deal of the theory of welding, especially about the melting and freezing of metals which are necessary in order to join them. … By this time the weld beads you deposit should be fairly even and straight. It is time that you now actually start welding two pieces of metal together.