Welding Advice Needed...
Thread Starter
Instructor
Joined: Oct 2005
Posts: 140
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From: O-Town Florida
Welding Advice Needed...
Need some advice from anyone with a background in welding. I purchased a used set of GHL’s for my C6 from someone. I just realized that the two one inch welds (one on each side of each can) that hold the left and right sides together are cracked almost halfway down. Probably happened when it was shipped. I need to get these welded and wanted to know if there’s anything I should be looking for or asking when I take it to a welding shop. I don’t want corrosion on the welds 6 months from now.
Race Director
Joined: Oct 2004
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Originally Posted by rclark
Need some advice from anyone with a background in welding. I purchased a used set of GHL’s for my C6 from someone. I just realized that the two one inch welds (one on each side of each can) that hold the left and right sides together are cracked almost halfway down. Probably happened when it was shipped. I need to get these welded and wanted to know if there’s anything I should be looking for or asking when I take it to a welding shop. I don’t want corrosion on the welds 6 months from now.
A correct repair will start by completely grinding out the faulty welds and starting with clean metal. The preferred process is TIG, and the preferred filler is Hastalloy. Be sure the weldor properly passivates the HAZ (Heat Affected Zone) after doing the repair (nitric acid pickle), otherwise the weld zone will rust.
Note that a proper repair can be done with MIG (use 316L filler wire), but the entire piece will need to be preheated before welding and cooled slowly in vermiculite to prevent hot short cracking of the weld as it cools. Hastalloy is high nickel, and lets you successfully do the repair without as much worry about hot short cracking. But you can't get MIG wire in that alloy.
Thread Starter
Instructor
Joined: Oct 2005
Posts: 140
Likes: 0
From: O-Town Florida
Thanks for advice... gonna try to get them fixed tomorrow.
Unfortunately, GHL's warrenty is non-transferable. I should have bought these new. They would have cost me the same new by the time I'm done... and I would have had a warrenty. Live and learn.
Unfortunately, GHL's warrenty is non-transferable. I should have bought these new. They would have cost me the same new by the time I'm done... and I would have had a warrenty. Live and learn.
