Hastelloy C276 versus Hastelloy C-22
Hastelloy C276 versus Hastelloy C-22
(OP)
Dear "metal masters":
which arew the differenced between Hastelloy C-276 and Hastelloy C-22 and which of the alloy is more resistant to the contact with hot HCl solution at 9%?
Thanks for your help.
which arew the differenced between Hastelloy C-276 and Hastelloy C-22 and which of the alloy is more resistant to the contact with hot HCl solution at 9%?
Thanks for your help.





RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
http://www.haynesintl.com/mini/C276s/C276.htm
http://www.haynesintl.com/mini/C22s/C22.htm
Haynes shows the corrosion rate in boiling 10% HCl to be 288 mils per year for C-276 and 400 mils per year for C-22. Thus, C-276 has more resistance.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
This is a part in Hestelloy at the exit of our recovery boiler. As such, this is subject to a big chemical attack because the gases exit at around 350C from the boiler and are cooled down to around 70C trough water spray in this part. The main component that might attack this is HCl.
RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
RE: Hastelloy C276 versus Hastelloy C-22
But as often in practice it is not that easy and there are still area’s where C276 is better than C22, in certain reducing environments. In general C22 is to prefer in highly oxidising environments.
I also like to comment on Metalguy quote “Elevated temp. and HCL is Hast. B territory”
Be very careful!!! ONLY FOR REDUCING ENVIRONMENTS you can use a Hastelloy B type! A few ppm ferric or cupro oxidising salts will generate rapid attack, sometimes in days.
Regards
dutchmat