PC boxes are most likely clad with galvanize material. Galvanizing requires the base metal be coated with Zinc compounds which can and WILL contaminate your weld, thus welds that look like bird droppings. The job of rod flux is to carry away the contaminates in the weld puddle, but the flux core wire from China doesn't have enough volume of flux to combat zinc contamination of the weld puddle.. in fact.. if you were using gas, you would have to crank up the flow rate to over come it.
The fact that you are having splatter and slag issues should have keyed me to tell you the zinc boiling off is likely the cause. I overlooked that.. my apology. Try a welding a piece of the same material you have dressed with a grinding wheel to clean steel.. see if it doesn't give you a much better weld. I will lay bets it does. Go to your local steel supplier and pick up some end cut scraps for practice, in MILD STEEL only.. then run a few passes.. look at the difference.. you should see immediate good results.. even with crappy Chinese flux wire from Harbor Fright. A good part of welding is knowing the metalurgy of the metal you are joining.. and how it affects the weld. On Fri, Jun 5, 2015 at 3:28 PM, Dimitri via Mercedes <mercedes@okiebenz.com> wrote: > Unless you use shielding gas you will be unhappy with your results. I > promise! > > Sent from my iPhone > > > On Jun 5, 2015, at 4:33 PM, clay via Mercedes <mercedes@okiebenz.com> > wrote: > > > > The wire is garbage, but it came free with the welder. May as well burn > through it. > > > > setting up feed speed is hit and miss for now. It does not want to feed > as slowly as the graph inside says I need it. There are two amperage > speeds. Lots and not that much. I could not get much speed or heat to get > a good bead > > > > clay > > > > On Jun 5, 2015, at 1:12 PM, fmiser via Mercedes wrote: > > > >>> clay wrote: > >>> > >>> I could not get a decent bead using the PC carcasses and was > >>> getting a bunch of blow through. > >> > >> Thin sheet metal and gasless wirefeed is pretty tough. Set > >> the wire feed and amperage low. And get some good wire. The > >> HF wire is junk. > >> > >> > >> _______________________________________ > >> http://www.okiebenz.com > >> > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
