Glenn5ft19
Registered User
This weekend I was welding elevator ribs, 1018 mild steel, to the 4130 tubing. Kind of by accident I found that by using a carburizing flame, the feather 1 to 2 times the size of the cone, the welding was much easier and the beads looked much smoother. Previously when using a neutral flame I would get a little bubble at the end of the weld if I pulled back too quickly. This did not happen with the carburizing flame. "BUT" I am worried about infusing carbon into the weld and affecting the properties of the 4130. I plan on welding up some samples using both neutral and carburizing flames and doing some tensile tests on the Tinius Olsen at work but I would appreciate any feed back from other members. I also have the training DVD of them building J3's at the factory and all though it is not very clear it looks like they are using a carburizing flame to weld the fuselages.
Thanks
Glenn
Thanks
Glenn