Tig Welding Chromoly Filler Rod

For tubing over 0 120 a 300 400 fahrenheit degrees preheat is required.

Tig welding chromoly filler rod.

First the use filler material that closely matches the base metal is not intirely true as there are many factors that dictate what filler material to choose. Your choice of filler rod is extremely important as the rod must correctly match the alloy of the material you will be welding. Tubing with a 1 16th inch filler 0 063 in is a bad idea because the tubing wall will melt before the filler rod is up to temperature. Faa ac43 13 1a section 5 4 74 9 states use welding rod and electrodes that are compatible with the materials to be welded.

As with all welding proper procedures and techniques must be followed. Try to weld chromoly slower than normal especially if. You don t need to preheat the metal for anything under 0 120 thickness but if you have the time it will not hurt to preheat at 100 fahrenheit degrees just to eliminate the moisture. Er70s 2 is also an acceptable alternative to er80s d2 as well as 70s 6 although weld strength will be slightly lower.

Stainless steel mild steel copper alloys aluminum alloys nickel alloys titanium alloys. Trying to weld 0 035 in. A common filler metal choice for welding chrome moly is er80s d2 this filler metal is capable of producing welds that approximate the strength of the 4130. But research has been done to prove that tig welding can be the fastest cleanest and best way to weld 4130 chromoly tubing without risk of compromising material properties provided the thickness does not exceed 120.

The thickness of the material you will be welding also determines the required diameter of the filler rod. Yes 4130 chrome moly has been tig welded in the aerospace and aircraft industries for years. Filler rod in tig welding you feed the filler rod into the molten puddle by hand. E70s2 mild steel tig welding rod use for welding 4130 chromoly tubing all mild steel and even cast steel.