Metal for SCA armor

[center108]

So I am apart of the SCA and am trying to create a roman fighting Kit. My knight is suggesting that I go with a 4130 Chromoly to use for the Segmenta however it is starting to look like its going to be expensive to get my hand on where I live.

My question is what is your guy's opinions on 4130. What do you kjnow about it? Should I look for something other than that to make my armor?