Can you mig weld chromoly tubing

Its real similar only with TIG you have much finer control. As far as dipping the tungsten. I used to have a job where I had to weld 32 ga stainless. If I drank coffee in the morning I couldn't weld it for I failed spelling. Some times it takes a lot of concentration to get it done. Don't for get to have gas the back side of the weld too. Speaking of wire feeds, has anybody else played with one of these yet? Way bitchen, if I had 4G's I would go buy one. Samco Fab Well-Known Member.

Often when the weld is grayish in color, not the rainbow colors, you have too much heat imput Too many times, I have seen welding instruction in general put all the emphasis on more and more penetration, and don't teach that you can put too much heat into a part. It takes a lot of patience to not overheat a part. One very difficult to get perfect weld is butt welding Stainless header tubes together.

Very easy to burn through. It all takes practice. HardCharger81 Well-Known Member. I demo'd the Miller welder that you have in your link Other welders are just the opposite. And the thing to remember is, when done properly, all welds are the same strengh. Samco Fab said:.

Last edited: Mar 24, Well-Known Member. Tiny welds help to avoid the mini-mountain range inside the tube.

Can mild steel and be welded toghether? If so, how? Is it strong? Yes, they weld together just like to or mild to mild. No special steps are required. Post reply. Insert quotes…. Tags: None. I have always thought that mild steel will work well for chrome molly. Comment Post Cancel. I don't know welding. I know computers. Got computer problems?

I have used mild steel wire for the welding up of chrome molly. I welded plane parts, cycle parts all using mild steel. Chrome molly can become very brittle when welding, especially on say both sides of a 14 g. I welded up a custom built cycle racing frame that a buddy built using both or first chrome molly wire on probably half the bike and then I used mild steel on the rest of bike. Bike still is holding up well. I have been told that mild steel works well for chrome molly.

The welds are full penetration. I have seen pipe vessels and such welded out completely with mig before and they worked out fine, but they are pressure tested to make sure they will work at the proper working pressure. Unfotunaltely for you, you cant test your plane before you use it.

I agree with the other post, tig weld definately will yield a better weld, but if you are completely confident in your mig, try some test pcs. It is your life at risk here. Mig welding tubing is not considered proper due to the difficulty of ascertaining proper penetration. Gas welding is an approved technique, as well as Tig. It is generally recommended that all welds be stress relieved. With gas welding, this can be accomplished by heating the tubing adjacent to the welds.

An alternative would be to weld the entire structure and then heat it to stress relieve it. I can't stress this enough- you are betting your life on your welds! Why take a chance with a technique that is not recommended? I have been to too many funerals for homebuilders that cut corners.