Sorry for the off topic query, but I know there are a lot of smart and helpful folks on this forum.
We have a specialized bolt manufactured in China for us. It works along side a door hold-open bracket so both require a Rockwell Hardness C of 45 - 50.
They are producing the bolt with SCM435 steel and I think that is equivalent to AISI SAE 4135H/4137H steel. This seems to have a normal hardness of 15 HRC. Can this steel be treated to reach the desired 45-50 HRC? I am assuming it must, but since I am materials illiterate I was hoping to find some expert input on the topic.