Mig Welding Copper To Stainless Steel

It tends to stack and not flow out to the edges of the weld.

Mig welding copper to stainless steel.

Spray arc short circuiting or pulsed arc transfer. Stainless steel is a popular metal in welding for many reasons it s very strong it s ductile and it s easy to weld especially in comparison to many other kinds of metal. But it s an important point. Spray arc transfer filler metals for gas metal arc welding stainless steel are specified in aws a5 9 93.

There are two issues with welding copper and stainless steel. First up the two metals have substantially different melting points. He recommends a 75 25 argon helium mix. Steel is also highly anti corrosive hence the title stainless.

Not surprising considering that our mig s use 75 25 carbon dioxide for steel and aluminum welds best with straight argon. Alternative gases that you can use are 98 argon and 2 co2 or 98 argon and 2 oxygen mix. Here is the key to successful copper welding he said. Choose from various diameters of wire for different welders and welding projects.

Sounds obvious i know. That gas is typically tri mix. Click here to view full size acrobat pdf file. Mode of metal transfer.

Properties of steel and copper during welding. A good weld bead. Carbon steel stainless steel aluminum magnesium copper nickel silicon bronze and other alloys. Even though most of the welding machine manufacturers have included a table of materials and voltage settings in the machine it is highly important for you to pick the right kind of gas and electrode wire to be used for mig welding stainless steel.

The ability to join a wide range of metals and thicknesses. The reason for more heat required on stainless steel is you have to remove the chromium oxides on the surface that give stainless it s corrosion resistance. Stainless steel melts at around 1400 c while copper melts at 1085 c that s a difference of 315 c this makes forming a puddle of the two metals extremely difficult. Solid stainless steel welding wire is well solid.

If the oxides do not burn away. The oxides burn away and the copper will wet to the metal. There s just pure stainless steel in it. Then there s the metallurgical issues of.

When mig welding on stainless you usually have three choices of transfer depending on your equipment. And to weld with stainless steel mig wire you ll need to use shielding gas. Grainger carries a large stock of mig welding wire and flux core welding wire to meet your welding needs including aluminum carbon steel copper coated mild steel stainless steel and more. Stainless steel mig welding wire.

It will weld with straight argon but not as well. Forums welding techniques tig welding tig brazing stainless steel. On its own stainless steel is not a problem to weld.