What type of welding manipulation should be generally avoided with low hydrogen electrodes?

What type of welding manipulation should be generally avoided with low hydrogen electrodes?

• A. Dragging
• B. Oscillating
• C. Vertical
• D. Horizontal

Answer: (A)

Dragging is generally avoided with low hydrogen electrodes due to the potential for creating defects in the weld, such as porosity and hydrogen embrittlement. When a welder drags the electrode, it maintains a consistent and prolonged contact with the base material, which can lead to excessive penetration and undesirable heat input. This can enhance the likelihood of hydrogen absorption by the weld metal, increasing the risk of cracking, particularly in high-strength steels when low hydrogen electrodes are used. On the other hand, oscillating, vertical, and horizontal manipulations can be used effectively with proper technique, as they allow for better control over heat distribution and can help minimize issues related to hydrogen entrapment. It is essential to consider the welding position and the specific requirements of the project, but dragging should generally be minimized to ensure the integrity and performance of the weld joint.

Dragging is generally avoided with low hydrogen electrodes due to the potential for creating defects in the weld, such as porosity and hydrogen embrittlement. When a welder drags the electrode, it maintains a consistent and prolonged contact with the base material, which can lead to excessive penetration and undesirable heat input. This can enhance the likelihood of hydrogen absorption by the weld metal, increasing the risk of cracking, particularly in high-strength steels when low hydrogen electrodes are used.

On the other hand, oscillating, vertical, and horizontal manipulations can be used effectively with proper technique, as they allow for better control over heat distribution and can help minimize issues related to hydrogen entrapment. It is essential to consider the welding position and the specific requirements of the project, but dragging should generally be minimized to ensure the integrity and performance of the weld joint.