Copper Sheet For Welding

Due to its high conductivity the base material copper acts as a heat sink so the welds need to be hot and fast.

Copper sheet for welding.

It depends on your plan or your manufacturer s plan. The two filler metals most often selected to weld the pure copper alloys are aws a5 7 ercu the c7 of the now superceded bs 2901 part 3 and ercusi a the old c9 of bs 2901. P deoxidized copper contains low amounts of oxygen but tends to have up to 0 05 phosphorus and 0 05 arsenic which can release fumes. The leaching is worse at high temperatures like boiling a liquid and containing the steam.

Ercu typically contains 0 4 of si and mn with 0 8 of sn to aid fluidity. Tig welding is an option if you re the risk taking type. This alloy generally has less than 0 02 oxygen. Currents on the high side of the range are favored for the higher conductivity lower nickel content alloys.

Alloys can leach metals into the liquid that aren t good for drinking. If you are welding copper for handling potable water or stronger drinks use pure copper not alloys. It is often necessary to raise the temperature level of the sheet in an area of 6 0 to 12 0 in. Tig welding copper photo courtesy metal works fabrication is copper easy to weld.

Many weld consumable manufacturers offer cu ni and nickel copper electrodes and filler wires to recognised specifications table 11. For welding copper nickel to steel nickel copper consumables containing about 65 ni are used as the weld metal can absorb more iron dilution from the steel without cracking than copper nickel weld metals. 152 4 to 304 8 mm away from the weld. Ercusi a contains 1 mn and 3 si and is the preferred filler metal for tough pitch and p deoxidised.

Oxygen free copper will allow copper to retain the original bronze color after welding by preventing oxidation. Representative parameters used in joining cu ni alloys by gmaw spray arc are shown in table 3.