Re: New Member With Questions
- Hi everybody :
I read about someone is going to weld 4130 as his first experience.
that is what I call "balls!"
becareful ! it is a Cr.Mo.steel that is normalized.
U.T.S is above 95 ksi and MIG is a bad choice unless pulsed arc with
recommendations of an expert.
SMAW is abetter choice using E10018-(B3) with electrode dia2.5 as
first pass, 3.25 as second and 4 for the third pass.
BUT you absolutely need a welding engineer by your side.
MAN !!! it is aviation field not one floor steel structure !!!
if you are really into doing it by yourself contact me on
--- In firstname.lastname@example.org, "Stan" <stan-k@...> wrote:
> I am no expert in welding but I too am going to be working on an
> airframe soon. I have done much research and spoke to many experts
> the field of welding 4130 in airframes and they all say that MIG
> welding in airframes can be done but NOT recommended. A better
> for that application is Oxy-acc or a TIG setup. Talk to your local
> chapter and do some research before starting to weld up your
> Stan Bearhawk plans built #947
> --- In email@example.com, "Merrill" <skymanta@> wrote:
> > A good day to all!
> > Glad I found this list. I was given a new lincoln 175 pro mig
> > in the box and decided to learn to MIG weld. I have been useing
> > gas and ER70S-6 wire on 4130 .035 tubeing and cutting and
> > welds by bending. You are right, I would like to weld up an
> > someday. But before I do this I will learn and practice and
> > I have found that a tube will tear about 1/4 inch from the bead
> > bead is run along the joint. However, if the bead is across the
> > all the way around, (harder to weld this way),it will not tear.
> > How can I get the same strength in a joint or cluster welding
> > the seam. Any suggestions?
> > Thanks in advance for all your help and answers.
> > Merrill