SA-350 LF2 vs SA-765 GR 2
SA-350 LF2 vs SA-765 GR 2
(OP)
Does anyone have any comments or history with these materials used for large, thick (14") ASME tube sheets? Design 350 PSI @ 500°F - MDMT (-)20°F? I am interested in the toughness and the best material I can get.





RE: SA-350 LF2 vs SA-765 GR 2
Today, I would probably recommend going with SA-765 Grade II only because it applies directly to carbon and low alloy steel forgings for use in heat exchanger and feedwater heater components, like tubesheets.
RE: SA-350 LF2 vs SA-765 GR 2
RE: SA-350 LF2 vs SA-765 GR 2
Impact tests are required in ASME SA 765 - Table 3. The purchaser can recommend other test temperatures as optional but you need to conduct impact tests. For Grade II the impact test requirement is 12 ft-lbs at -50 deg F.
RE: SA-350 LF2 vs SA-765 GR 2
RE: SA-350 LF2 vs SA-765 GR 2
Oops, misread 6.1. Going senile.
RE: SA-350 LF2 vs SA-765 GR 2
Been there and have done that many times. Time for a beer!
RE: SA-350 LF2 vs SA-765 GR 2
I call that a "senior moment" and it seems to happening more frequently.