Author	[Modern View]
Fullmer 02-15-2013 13:56:54 198.228.228.147 Report to Moderator	Saw a stick welder for sale and said it was a 500 amp, what kind of welding do you do at that high amperage?has lanse or any one tried a welding test on Metal that was cooled in water after welding does it really ruin the weld?? [Reply]   [No Email]
fullthrottle 02-16-2013 17:42:50 166.137.210.32 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   I have (and use) a "vintage" Hobart G-600. It has a 2 cylinder Detroit Diesel. We use it to air arc (carbon arc cut) with. It works well and is pretty good on fuel. The amperage controls need replaced (bad contacts)so that you could weld with it. It's permanently set on Maxine now!! [Reply]  [No Email]
Puddles 02-16-2013 02:27:32 24.113.77.208 Report to Moderator	Re: Couple welding questions in reply to Pops1532, 02-15-2013 13:56:54   Stan in my line of work, we were almost never out of the swing radius of a crane, if so then the crane would move. The only way you will have any real production is to roll the beams, and do all the welding flat. Most projects we did, the iron was fabed in our yard on the Duwamish River, or our yard of the Puyallup River set on barges, and shipped to site. 90% of the iron on this project just west of the Bonneville Dam was fabed in the Puyallup River yard. All double 36”x300# beams, with double 24”x94# beams, setting on over a million dollars of 36”x 3/4” wall pipe bought in Mexico. This temporary work trestle was little bigger than a football field. [Reply]  [No Email]
JD Seller 02-15-2013 22:16:11 208.126.196.144 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   Did some bridge welding in the 1980s. Some of the beams where 4 foot tall and had an inch thick web. We ran 5/16 rods at 400 amps to fill the vee on those big beams. All the welders where gas powered. [Reply]  [No Email]
Stan in Oly, WA 02-15-2013 23:35:04 174.31.223.173 Report to Moderator	Re: Couple welding questions in reply to JD Seller, 02-15-2013 22:16:11   I've heard that it's challenging to weld out of position with big stick electrodes at high amperage. Was it, or were you able to do those welds in the flat position? Stan [Reply]  [No Email]
JD Seller 02-16-2013 12:41:21 208.126.196.144 Report to Moderator	Re: Couple welding questions in reply to Stan in Oly, WA, 02-15-2013 23:35:04   They where all flat welds as this was a new bridge. We did repair some older bridges and there we had to weld out of position on most of those welds. These we usually used 9018 and 10018 3/16 rods. Set the welder usually at 175-200 amps. When we where doing those flat welds they sure created some heat. I sure pitied anyone that had to do them in the summer. We where welding in the winter. You kept warm. [Reply]  [No Email]
Stick welding 02-15-2013 23:42:23 96.53.210.246 Report to Moderator	Re: Couple welding questions in reply to Stan in Oly, WA, 02-15-2013 23:35:04   Had to be flat. Probably had a lot of iron powder in them. [Reply]  [No Email]
Stick welding 02-15-2013 15:52:23 198.53.83.89 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   A 500 amp machine will most likely be 3 phase and if it is single phase, will use more power than everything in your house and your neighbors as well. Generally it is a big no no to cool welds in water but certain types of metal it is OK. I know certain stainless steel benefits from being dunked while red hot. [Reply]  [No Email]
Puddles 02-15-2013 16:13:40 24.113.77.208 Report to Moderator	Re: Couple welding questions in reply to Stick welding, 02-15-2013 15:52:23   Oh I don't know about that! I use to get 500-amps out of this thing all the time, and the lights never dimmed! :lol: [Reply]  [No Email]
Stick welding 02-15-2013 22:47:47 96.53.210.246 Report to Moderator	Re: Couple welding questions in reply to Puddles, 02-15-2013 16:13:40   I think a diesel is about the only way I'd want to run 500 amps. LoL The old SAE 400's with a 6 cylinder Continental were pretty thirsty. [Reply]  [No Email]
welding man 02-15-2013 15:05:23 76.9.225.68 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   500 amp is just exactly what you need to carbon arc. As far as cocling the metal in in water. Depends on the metal,the carbon content and what the critical temp is for that metal and how hot it is when you cool it.Ever heard of heat treating, tempering and drawing? Ah the wonders of metallurgy. [Reply]  [No Email]
Puddles 02-15-2013 14:24:58 24.113.77.208 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   I've had steady diets of splicing 36”x300# I-beams, run in excess of 400-amps no problem. I use to have a policy if the number on the welding machine didn't start with a 4, I'd walk right by it and grab another. :wink: I personally wouldn't cool a weld in water, but have heard where a lot of testing is going on, the test people will cool mild steel test in water, with no ill effects. [Reply]  [No Email]
Ted in NE-OH 02-15-2013 14:12:32 72.16.19.80 Report to Moderator	Re: Couple welding questions in reply to Fullmer, 02-15-2013 13:56:54   Maybe high amperage for gouging or cutting with a rod, can be done. [Reply]  [No Email]