API Trim 7
API Trim 7
(OP)
For the first Time I have a customer insisting they need a valve with API trim 7.
My question is what grade and how do you Heat treat a 13%Cr material to get it to a 750Hb hardness?
I have some procedures to get 420 in the 500 Hb range but nothing close to 750Hb
My question is what grade and how do you Heat treat a 13%Cr material to get it to a 750Hb hardness?
I have some procedures to get 420 in the 500 Hb range but nothing close to 750Hb





RE: API Trim 7
You mean 420-SS? If yes, check 430-SS.