Good headshots

I wonder 🤔 why it cracked at the toes? Maybe not hot enough when welding. I googled 515 grade steel for reference learned something new. Course grain steel intended for intermediate / high temperature service in boilers and other PVQ applications. This grade is produced in both the As Rolled and Normalized condition.

That's big 🤯

Did some more research apparently most copper nickel alloy pipes have at least a 50% or more copper content. Copper does not make sparks when grinding. I saw an iso marking on the pipe. I do not know what it means.?

I usually do the root with MIG the the fill and cover pass are with dual shield JD Brewer

I forgot I could tag the instructors on this platform. Thanks

I struggle with tack welding and getting a proper gap when welding pipe with stick. My space always gets stuck with one tack. 

Have you used plug or slot welds for this type of project?

My past welding instructor told students if you could TIG weld aluminum then you could easily tig weld carbon steel and stainless. Is TIG welding aluminum harder the TIG welding carbon steel & Stainless steel?

Looks good ☺️