Well I found a place locally that will TiN my carrier and bolt for $75 but they're asking if I know the steel before they will treat it.

I did some searching but I am finding nothing. I am sure that is because there is a thousand different manufacturers all using something different.

I have an 2003 Saiga .223. Does anyone know even a general idea of what the steel might be? 4140, 8620, 9310...

I've asked on a couple AK forums but my posts are stagnant.
Thanks in advance for ANY insight.