As a cast alloy?
What on earth is the microstructure?
I have seen 30% Cr ferritic SS (<0.03% C) but never a martensitic.
My first thought was an HD grade, but these usually top out at 0.50% C.
How has your material been heat treated?
Do you know?
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed