Where to get copper plates for backing welds?

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As the title states. Anyone know where I can pick some 1/8" plates up? I saw Eastwood sells them but seems a bit overpriced at $20 for a 4"x4" piece.
Reply:Just buy 1" tube and beat it flat.Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:Did you check eBay?Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Copper plates are spendy. Just the way it is. I have them because I use old throw away buss bars and battery bars from work. If had had to pay the price I'd do like Burpee says, hammer one out of some scrap."The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:I get mine from a rain gutter manufacturing place here in Austin.  For some reason they have not only the thin gutter stuff, but much thicker pieces as well.  They sell their drops cheap.Miller Syncrowave 350Millermatic 252/ 30A spoolgunMiller Bobcat 225g w/ 3545 spoolgunLincoln PowerArc4000Lincoln 175 Mig  Lincoln 135 Mig Everlast 250EX TigCentury ac/dc 230 amp stickVictor O/AHypertherm 1000 plasma
Reply:i got mine from salvaged electrical equipment boxes.i.u.o.e. # 15queens, ny and sunny fla
Reply:I put pennies on the railroad tracks in the 1950's and collected them after the train went by. I have a box of them and they're NOT for sale.MM210TA186TA95sLincoln AC/DC Tombstonegood old Smith torch setup 24v Readywelder mig w/spoolgunSB H 10 latheBridgeport mill6x12 K.O.Lee surface grinderK.O.Lee tool/cutter grinder
Reply:Originally Posted by hillI put pennies on the railroad tracks in the 1950's and collected them after the train went by. I have a box of them and they're NOT for sale.
Reply:usually you can purchase copper bars at your local scrap yard. they usually have all sizes and shapes they sell by the pound just like they buy by the pound.
Reply:Grangers or McMaster Carr
Reply:Online Metals has added a copper category. It's not cheap anymore but this might be among the least pricy sources for sized copper - bars, sheets, rod, etc.  http://www.onlinemetals.com/merchant...966&top_cat=87Also, Eastwood has a couple of copper plates with magnets added to hold them in place.  If you go for one of those be careful not to get the magnets hot. Arc welded magnets ain't magnets anymore - they die.Last edited by hill; 01-12-2014 at 07:47 PM.MM210TA186TA95sLincoln AC/DC Tombstonegood old Smith torch setup 24v Readywelder mig w/spoolgunSB H 10 latheBridgeport mill6x12 K.O.Lee surface grinderK.O.Lee tool/cutter grinder
Reply:I source mine from old transformers and stuff like that.why not use aluminum? I do sometimes, is there a reason as to why not?bosses stuff:trailblazer 325maxstar 200my stuff:sa 200fronius transpocket 180100 amp Lincoln w/f97 f350 DITKevin
Reply:I have a bin full at work, we laser cut bus bars and the scrap can be 5" x 16" sometimes. Try a scrapyard or lasercut shop.They conduct better than aluminum, I like the 1/4" ones, I also have a few 1/8"pieces bent 90 and filled square for box corners. Worth their weight in... copper!Last edited by Brazin; 01-12-2014 at 10:15 PM.SqWave 200Millermatic 190Airco 200 ACHypertherm PM45Boice-Crane Band SawVictor O/A
Reply:Originally Posted by 92dlxmanI source mine from old transformers and stuff like that.why not use aluminum? I do sometimes, is there a reason as to why not?
Reply:I use a piece of buss bar.  Know any local 3 guys?Just ask one to snag you a piece from a job.  Usually pretty cool about it.TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum
Reply:I got mine from the scrap yard, for a little over $2/lb.Both are 1/4'' thick one is 13'' by 7'' and the other is 9x9'' didn't pay more than $40 for both if I remember correctly.old Miller spectrum 625 Lincoln SP-135 T, CO2+0.025 wireMiller model 250 and WP-18V torchCraftsman 100amp AC/DC and WP-17V torchCentury 115-004 HF arc stabilizerHome made 4 transformer spot welderHome made alternator welder