Hi all,

I can't find material A 358 321H in CAESAR database and on ASME B31.3 is missing, too.

Is Material (226) 358 321 cl.1 equivalent to material mentioned above?

If not, where can I find 358 321H cl.1 caharacteristics to input in caesar material database?

TY.

Type 321 is type 304 modified by adding titanium in a specific amount, the result being the steel is stabilized against carbide precipitation.
Type 321H has higher carbon content for better high temperature creep properties and is modified by adding titanium in a specific amount, correlated with the carbon content. 321H also has a requirement for a grain size of ASTM No 7 or coarser.

I think you can consider the same properties in case you are not in creep range.

Ok. Thank you for your explanation.

Dear Mariog,

Can you please tell me which one is better metallurgy A358 304L or A358 321 for corrosive fluid (i.e acid gas) at temperature 400 degree C. ?

Is there any chances to form chromium carbide at grain boundaries at 400 C in corrosive environment?

Regards,
MB