Copper Backing Bar
Copper weld backing is a forming tool made of high-purity copper with high thermal conductivity. It supports the melt at the root and promotes heat dissipation, preventing weld pool sagging.
Physico-Chemical Mechanism of Action
Copper backings are made of high-purity copper and have very high thermal conductivity. They promote heat dissipation at the weld, which keeps the weld pool stable and prevents it from falling through.
Metallurgical Relevance & Risks in Welding
A weld pool falling through can lead to uneven distortion and porosity in the weld. The copper backing prevents these issues by stabilizing the molten pool.
Shop Practice & Instructions
Use copper backings for welding jobs that require high heat input. Make sure the copper sits right at the root of the weld. The exact shape and size of the backing depend on the welding process and the material being welded.