davidjohnperry
a different breed
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- Thread starter davidjohnperry
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BrokenBiker
Member
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turn setting down a touch or.move faster. Undercut is due to too much of the parent metal.melting and being drawn into the puddle. All about heat control, keeping the puddle hot enough for penetration but not too hot that the parent metal.suffers.
weld doesn't look too bad though
weld doesn't look too bad though
aametalmaster
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steviec_lj
Rust Welding Professional
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Personally, I wouldn't call the circled areas above, undercut.
Saying that, I have had no formal welding training, nor am I an inspector, nor can I perform a V-Up with mig very well. Just looks like you've moved a little fast.
Saying that, I have had no formal welding training, nor am I an inspector, nor can I perform a V-Up with mig very well. Just looks like you've moved a little fast.
Tino
Member
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You prevent undercut by pausing at each side of the weave. Count, one,two across, one,two across or one,two into the corner and out, one,two across, one,two into the corner and out. Keep practicing and you will develop a smooth consistent rhythm (without counting) and no undercut. Poor prep can also cause undercut, so keep your plate nice and clean.
And yes that is undercut. When I was training 10% of plate thickness or 1mm max over some of the weld length (cant remember how much) was allowed. I don't think many places in industry would allow 1mm deep, of undercut to pass though.
And yes that is undercut. When I was training 10% of plate thickness or 1mm max over some of the weld length (cant remember how much) was allowed. I don't think many places in industry would allow 1mm deep, of undercut to pass though.
