Hastelloy C-276 for TIG welding carbon steel?
Why hastelloy c-276?
Because I have about 10 lbs of .031" hast c276 wire and dont know what to do with it.
In the early 90s I worked for Delta Airlines when they acquired PanAm.
As a Delta employee, I could purchase scrap metal for cheap every Wednesday…
shortly after the PanAm event, a pallet of tig rod showed up at the scrap yard.
PanAm used a color coding system that was not compliant with the process standard at Delta so the rods were deemed scrap for Delta usage.
But for me, they were just fine.
So I bought a whole pallet of tig welding filler rod for 100 dollars.
I probably could have paid a lot less but I didn’t want to take a chance on missing the deal because I saw about 100 lbs of hastelloy W in the mix and that stuff is over 100 bucks per pound now…even back then it was probably 50 bucks a pound.
part of that pallet was about 10lbs of hastelloy C-276.
The chemical composition of Hastelloy C-276 is...
Element Content (%)
Molybdenum, Mo 15-17
Chromium, Cr 14.5 - 16.5
Iron, Fe 4-7
Tungsten, W 3-4.5
Cobalt, Co 2.5 max
Manganese, Mn 1 max
Silicon, Si 1 max
Vanadium, V 0.35 min
Carbon, C 0.08 max
Phosphorus, P 0.04 max
Sulfur, S 0.03 max
Nickel, Ni Remainder...approximately 58% nickel.
Hastelloy C276 is a nickel-chromium-molybdenum filler metal developed for MIG and TIG welding of Hastelloy C and Hastelloy C-276 to themselves, to stainless steel or to other nickel base alloys.
It is also a very good filler metal for welding dissimilar metals like low alloy steels to stainless steels, or for an overlay buttering filler metal.
Hastelloy C276 has excellent resistance to pitting, stress-corrosion cracking and oxidizing atmospheres up to 1900 F.
Hastelloy C276 filler metal is frequently used for cladding carbon steel to improve corrosion and pitting resistance for the chemical and petroleum industries.
Hastelloy C276 has excellent resistance to a wide range of chemicals including the corrosive effects of wet chlorine gas.
Other uses include hot contaminated mineral acids, solvents, and solutions(organic and inorganic) seawater and brine solutions.
In short, hastelloy c276 filler metal is very useful.
Is it a good choice for welding carbon steel to carbon steel?
probably not...mostly just because of the cost.
at over $50 per pound, it doesnt make any sense to use it on plain carbon steel ...but it sure looks nice.
PS. I am working on a video about filler metal selection for TIG welding ...so stay tuned for that. If you are already signed up for my weekly video newsletter, you wont miss it.