SOHC Posted November 12, 2021 Share Posted November 12, 2021 Anyone here done much cast iron ARC welding? I want to weld up this, 700mm x1000mm 45kgs, i got some of those high nickel rods witch recommend no pree heating and just peen the weld. I was going to drill the ends of the cracks and work my way to the middle with a stich with a long cool down time, and possibly de stress the whole thing after? I have a cast iron plate I was going to make a patch from. Sound like an ok plan? 1 Quote Link to comment Share on other sites More sharing options...
Geophy Posted November 12, 2021 Share Posted November 12, 2021 Yeah just try a small bit, it will become obvious whether its working or not. Those rods go mean on the tig just scrape the flux off and wire wheel the rod. Use as your filler rod for all the dodgy repairs. Used them recently to weld up some holes between the vanes on a triumph 2000 water pump for old barry mate. Apparantly its still going mint, he refuses to replace it as reckons its a long term repair. Was quite a good repair to do as was the gunkiest place to repair, super grot super shit casting but still welded good. 6 Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 12, 2021 Author Share Posted November 12, 2021 Yeh i am tempted to hammer off the flux and gas weld with them, I will give it a test run on a bbq plate. 3 Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 13, 2021 Author Share Posted November 13, 2021 Its welded now, had to pre heat and post heat, it was a hard horrible dirty job and it was impossible to get nice welds, it welded best when it was over heating 4 Quote Link to comment Share on other sites More sharing options...
JustHarry Posted November 13, 2021 Share Posted November 13, 2021 What are these rods you speak of? I've got to fix a crack in the top plate of my coal range just at the thin part that goes around the flu . I dont want to recast is as it's a big piece Does brazing work? Maybe with a gusset Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 13, 2021 Author Share Posted November 13, 2021 51 minutes ago, JustHarry said: What are these rods you speak of? I've got to fix a crack in the top plate of my coal range just at the thin part that goes around the flu . I dont want to recast is as it's a big piece Does brazing work? Maybe with a gusset https://www.globalweldingsupplies.co.nz/range-page.php?sku=R_WEIP2KG They are very expensive but seem to stick shit together, i dont know about nice looking welds. Brazing would work. 2 Quote Link to comment Share on other sites More sharing options...
sentra Posted November 17, 2021 Share Posted November 17, 2021 those pure nickle rods on an stick welder are amazing and make a first timer look like a pro. you would probably weld everything with them if they weren't so expensive. 1 Quote Link to comment Share on other sites More sharing options...
GregT Posted November 17, 2021 Share Posted November 17, 2021 I've done quite a bit of repair brazing on CI. Replacing broken fins, broken flanges on cylinders and similar. There's a specialised flux available for this work - and it works. I've used Manganese Bronze rod and Nickel Bronze - no noticeable difference. If you've got the gas welding gear, a pot of the flux is worth getting. 1 Quote Link to comment Share on other sites More sharing options...
SOHC Posted November 17, 2021 Author Share Posted November 17, 2021 4 hours ago, GregT said: I've done quite a bit of repair brazing on CI. Replacing broken fins, broken flanges on cylinders and similar. There's a specialised flux available for this work - and it works. I've used Manganese Bronze rod and Nickel Bronze - no noticeable difference. If you've got the gas welding gear, a pot of the flux is worth getting. Welding fins on is easy, I mist have done 100s of them. 7 Quote Link to comment Share on other sites More sharing options...
smokin'joe Posted November 27, 2021 Share Posted November 27, 2021 any truth that silicone bronze wire can be used for MIG welding cast ? need to do repairs to spare coal range before installation Quote Link to comment Share on other sites More sharing options...
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