welding monel pipe open root butt welds

by chad bressie
(houston mo)

what is the correct wps and any tricks or tips and how much and how much purge should i run ? and about what amperage and inter-pass temps and pre heat or no pre heat before i tack it ? and rap it or no rap when im done with the cap ? i have been welding for ten years as a cpw and tube welder and worked all over the us and never messed with this alloy your help would be greatly appreciated thanks jody


I have welded very similar alloys but never monel open butt pipe.

what i do know is that using as large a cup as possible along with gas lens will help because it keeps the tip of the rod from oxidizing.

on a sluggish puddle like monel, keeping the hot top of rod is very important.

a good purge on the root is also very important on monel not only for the root but to make the rest of the passes go better.

Return to tig forum.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.