Q: I’ve been using 254 SMO bolts and am happy with their corrosion resistance but need a little more high temperature stability as sometimes our process can go up to 800F. Any suggestions?

A: 254 SMO bolts are in a class of material called 6 Moly alloys. Another 6 Mo alloy that has similar chemistry to 254 SMO is AL6XN. AL6XN bolts offer slighter higher corrosion resistance as well as high temperature capabilities with a usable temperature limit of 1000F compared to 700F of 254 SMO.