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Tractor Talk Discussion Forum

Re: OT 20 hours of welding...

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03-21-2013 17:30:29

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We're in the process of switching to flux core wire for our 350P at work. We always used .062" metal core, but then we switched vendors and the sales guy came in and gave his reccomendations, one being .045" flux core.
I've burned a few spools of it now and I gotta say I like it! I had to switch back to finish up the last 2 spools of metal core which are almost gone now, and then I can go back to the flux core. Even had the Esab rep come in and give me a little demo. Looks like a good job.

Donovan from Wisconsin

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03-21-2013 18:13:20

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 Re: OT 20 hours of welding... in reply to Don-Wi, 03-21-2013 17:30:29  
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Flux core is awesome for any type of structural welding I can go ahead and save you a bunch of grief and tell you to stay away from anything but Lincoln or ESAB wire, anything else will give you troubles with wormtracking and slag inclusions at the worst possible moment.

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Stick welding

03-21-2013 22:05:15

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 Re: OT 20 hours of welding... in reply to aarolar, 03-21-2013 18:13:20  
That might have been a good job for sub-arc? 516 gr. 70 is common boiler plate. Don't hear too much of 516 gr. 50. There are some other good flux-core wires like Tri-Mark and a few others. Some users say Hobart has less spatter than Lincoln. That said, I agree on the worm tracking, slag inclusions and porosity with flux-core. I've done a bunch of flux-core and at times it would weld perfect and then have all kinds of problems for no apparent reason and of course in the hardest places to grind it out!

Be glad you could use flux-core. I've welded thick vessels that had to be done with 1/4" 7018 and preheat. Biggest weld I ever worked on was a 2 1/2" thick repad on a 2 1/2" thick nozzle out the side of a vessel. 100% penetration so in essence 5" thick of weld. What really added to the job was the repad was cut for a 24" nozzle but the nozzle was only 20". Of course the shell was beveled to get full penetration after gouging into the back weld(inside) and once it was filled up had to be ground flat for the repad. Then the repad was beveled to have room to get full penetration and once filled up was ground flat with only a 3/8" fillet weld showing. The outside of the repad required a 3/4" or 1" fillet weld as well if I remember right. It took 2 shifts of 2 welders close to 20 hours to weld that up. It took a long time for it to cool off too.

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03-22-2013 05:28:33

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 Re: OT 20 hours of welding... in reply to Stick welding, 03-21-2013 22:05:15  
We mostly build equipment for local plants and have a contract for building paper mill equipment in our shop but we get heavy stuff every now and again but nothing like what you are talking about. I mostly do the odd jobs and the stuff that needs a certification as I am one of two certified welders in the shop. Most of the time you can find me tig welding intricate parts or doing the stuff that needs to have a more delicate finish.
An example of what we do the most of, this is a guillotine used to cutting waste paper rolls up so they can be repupled. I didn't have much to do with the fabrication on this one but I did get in to the hydraulic plumbing and wiring.

Here's a good example of what I do everyday, this is a nozzle that sprays starch on paper somewhere in the manufacturing process. That nozzle is hollow and has nipples on the top and bottom so they can flow cooling water through it and was tig welded with a argon purge to prevent sugaring. I was responsible for developing the patterns, cutting and forming the steel. All the machine work was done in house by our machine shop.

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