Posted by Rick Let's start with the horizontal, always make sure that you use a slightly heavier land on the top plate to help absorb the heat, you will find this will really help reducethe undercut. On the overhead, you need to jack the heat by at least another 10%. This will give you the arc force / push you require to get a little more penetration. For you bad tie inns on your start and stops, I always like to use a hacksaw with (2) blades side by side to feather or make a ramp into and leaving each tack. This will allow the puddle to gradually fuse into the lead in and lead out on the tack and give a perfect start and stop. When you hear about a pinhole in the tack, you tend to immediately think "porosity" but if you are not rooting with a low hydrogen rod then the normal cause of this phenomenom in usually the 6010 flux is too dry. 6010 has a cellulose "paper / wood" coating and that is why it smells like wood burning. This flux if it gets too dry has problems like fingernailing and unstable arc. An old trick is to take a damp cloth and wrap your 6010 electrodes in it about an hour prior to testing. You will see a big improvement in arc control and because the cloth is only slightly damp you will not see any adverse effects metalurgically. 6010 is the only welding rod that actually like a bit of moisture. Good Luck!
on 2/13/2006, 6:09 pm, in reply to "2g,5g pipe root"
216.126.113.119
It seems that you have a lot of different things going on and i am assuming that your are using a 6010 for your your root pass.
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