SCH10s exhaust manifold welding
#1
SCH10s exhaust manifold welding
Are you guys pushing your filler rod into your weld puddle and moving, or dabbing the filler into the puddle and moving?
I'm currently welding some SCH10 stainless pipe. I have ground knife edge bevels with no gaps between pipes. I am finding it hard to get the weld to be level with the pipe either side and am ending up with a concave weld.
I have tried to push and force the filler into the puddle, but this causes the puddle to become unstable and move about a lot. I have also tried bigger filler rods but they end up sticking when dabbing into the puddle.
I'm currently welding some SCH10 stainless pipe. I have ground knife edge bevels with no gaps between pipes. I am finding it hard to get the weld to be level with the pipe either side and am ending up with a concave weld.
I have tried to push and force the filler into the puddle, but this causes the puddle to become unstable and move about a lot. I have also tried bigger filler rods but they end up sticking when dabbing into the puddle.
#2
Honda-Tech Member
Re: SCH10s exhaust manifold welding
Are you back purging the stainless? I sinking/concave weld is indicative of poor/no purge and resulting in sugaring the root of the weld.
#3
Re: SCH10s exhaust manifold welding
Yep I am backpurging and getting good penetration with no sugaring.
I don't think the weld is sinking, I'm just finding it difficult filling the valley created by the bevel between 2 pipes .
I don't think the weld is sinking, I'm just finding it difficult filling the valley created by the bevel between 2 pipes .
#4
moderator emeritus
Re: SCH10s exhaust manifold welding
after making a sch10 manifold, it is absolutely ridiculous how heavy they are. using the material is nice to keep manifolds cost effective but man the difference between that and .065 321ss is just night and day. of course the cost is much different as well but this one i made isnt even finished and its a boat anchor.
#5
Honda-Tech Member
Re: SCH10s exhaust manifold welding
Ahh - in that case I would recommend making 2 passes. What filler diameter are you using? Try a narrower bevel angle if you find you cannot sufficiently fill & cap. A single pass can be done with 3/32 - if the puddle is getting squirrelly I would increase travel speed/adjust torch angle, or heat.
#6
Re: SCH10s exhaust manifold welding
don't have such an aggressive bevel and you will beable to fill it with a single pass...some like to do a root pass with no filler, weaving from side to side, then cap with a filler pass
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