ASTM A995 Gr 6A heat treatment
ASTM A995 Gr 6A heat treatment
(OP)
Dear All
We have a new designed 16" valve made in Gr 6A. During the heat treatment it was crecked. Do anyone have a typical chart for Superduplex heat treatment?
I assume we have to hold around 300-400 deg C for first step and haet up to 1100-1200 and holding there for sufficient time than water quechend.
Our chart is goes up 1150 deg C straitaway raffle 80 deg C / hours.
Thank you
Regards
Elmio
We have a new designed 16" valve made in Gr 6A. During the heat treatment it was crecked. Do anyone have a typical chart for Superduplex heat treatment?
I assume we have to hold around 300-400 deg C for first step and haet up to 1100-1200 and holding there for sufficient time than water quechend.
Our chart is goes up 1150 deg C straitaway raffle 80 deg C / hours.
Thank you
Regards
Elmio





RE: ASTM A995 Gr 6A heat treatment
RE: ASTM A995 Gr 6A heat treatment
I have checked it, looks like the foundry was following it. Do you have any idea why is creacked? Ramp rates my be too quick?
Thanks
RE: ASTM A995 Gr 6A heat treatment
RE: ASTM A995 Gr 6A heat treatment
Have a lovley day.