[color=#1155cc]Copper sheets https://metasearch.com.ua/budivnytstvo/mednye-listy-preimushchestva-svojstva-i-oblasti-primeneniya.html[/color] from one to three millimeters are welded with edge flanging, without the use of filler metal. Thin sheets, which are less than six millimeters, after butt welding must be forged in a cold state, and thicker ones - at a temperature not lower than 200-300 degrees Celsius. Forge metal seams and the transition zone. After forging, so that the seams on the metals are plastic and ductile, the metal is fired to a temperature of 550 to 660 degrees, and quickly cooled in water.