so, i'm working as a QC/QA at a chemical plant, there's not much going on so i am playing welder/welders helper. basically hangin out in the shop doing [freak] all.
they have this **** called Alloy 20, a 4" sch40 pipe is worth $1000/foot.

i'd say this is about $600 worth of pipe that i [freak]ed up.
it's kinda different to weld too, sorta like stainless but different.


my hot pass, looks good ya? turned out not too bad.



trying to do a fill/cap in one pass. ya i burned the **** out of it, hahahaha.
it was sugared to **** inside, i didn't bother hooking up the purge lines, maybe on monday i'll do a root and purge it.

 

1000/foot?! jesus christ

can u steal some?...

 

i have a box of weld elbows and fittings sitting in my desk there that is probably worth close to 10 grand.

i probably could steal some if i wanted to, but i don't have any use for it and i'd rather not lose my job over it. lol.
i did bring some filler rod home though, a tube of that is worth a grand too. heh

 

What is it used for?

 

Alloy 20 is one of the so-called "Super" stainless steels that was designed for maximum resistance to acid attack. It's nickel, chromium, molybdenum and copper content contribute to its overall resistance to chlorideon stress corrosion cracking and general pitting attack. The alloy is stabilized with columbium to minimize carbide precipitation during welding. It has good mechanical properties and can be fabricated with comparative ease. Athough the alloy was designed for use in sulfuric acid related industries, it finds wide usage throughout the chemical processing industry. It also is used for processing pharmaceuticals, food, gasoline, solvents, plastics, explosives, synthetic fibers and many other products.

 

Yeah, the Robert James Sales sight is about as much info as you will get.
Basically it is used where life is especially rough for steel to hang out!! lol

 

I did find a place with some alloy 20 fitting prices:
http://www.pennusa.com/pennpag...d.pdf

class 3000 is some pretty heavy duty stuff.

 

they use it as process piping in one of the "hotter" reactions on site.
http://www.innovene.com/produc...5.htm
some of the products that are manufactured.
Olefins is the main one.

 

yeah one thing that will eat the [freak] outta stainless is chlorine..

ive heard plants that pump chlorine liquid around use titanium pipes.. but maybe they use that stuff.

 

Alkyls, a reactive chemical.
flammable when in contact with air, and explosive when in contact with water. fun stuff.

 

is alloy 20 like monel? thats a high nickel copper alloy

 

"alloy 20" is a trade name for a high nickel/chromium steel with copper/moly added. Its indeed considered a super alloy like Inconel and such. Inco alloy 20 is very resistant to chlorine attack, which in pure form is about the most corrosive gas besides flourine. It should actually be decent to weld - they add niobium to prevent carbide precip.

These sort of metals are really that expensive. At my last job, I had to deal with four 16,000lbs chunks of Inconel 690 for a nuclear reactor. It is ~30% chromium/68% nickel to give you an idea, it retains most of its strength past 2000F (I think brass melts at 1800F for reference). We had a weird contest after a day of cleaning the scrap chips - who had the most 690 in our boots. I had regular shoes on, which is why I had $10 in sharp chips imbedded in the rubber

 

why the hell were you doing nuclear welding in normal shoes??