Welding is used in countless applications to create bonds between different materials, including thermoplastics and metals. Several metals can be fused with welding, and copper is no exception. Copper is commonly found in electric and plumbing components inside a home or commercial setting, so it’s not uncommon for home or business owners to seek experts who excel in welding copper. Here, Brady’s Welding Specialties in Tacoma, WA, shares an overview of the copper welding process.

Because metals vary in thickness, different welding approaches must be used to accommodate this. For instance, since copper is thicker than steel, copper welding requires roughly twice the level of heat as steel welding to be performed successfully. The ratio of gas and temperature used to weld copper must be adjusted according to its thickness. Professionals typically use 100% helium gas to achieve the proper level of heat, which has a higher power than other gasses used for welding, such as argon.

Copper is also notorious for its high thermal conductivity, which can create heat loss during the welding process. To prevent this issue, some welders prefer to preheat copper prior to welding. This can reduce the risk of cracking, and it may also yield a weld which is stronger and less porous.   

After the proper heat and gas levels have been attained, welders initiate an arc at roughly a 70 degree-angle to the copper. They’ll then add just the right amount of filler to the puddle created, applying it as the arc fuses the copper. When welding copper, the filler rod must match the materials being welded, so it should consist of either copper or copper alloy.  

Because copper has such a high thermal conductivity, welders must move quickly to prevent the copper from oxidizing as they work. If the materials cool too quickly, the weld can break, undoing all the work that’s just been completed. Thus, professional welders may use insulation such as fiberglass blankets or sandbags to prevent heat loss after welding in cooler weather.

As you can see, the process of welding copper requires a high skill level, experience, and a steady hand. Brady’s Welding Specialties has provided the Tacoma area with unparalleled welding services for more than 40 years, and their commitment to quality has helped them maintain an A+ BBB® rating. To discuss your welding needs with one of their friendly professionals, call (253) 475-4608 today, or learn more about their company by visiting them online.