If you are looking for a touring bike, the ultimate touring steel is 531st (st stands for super touring). The steel is a bit thicker than normal 531 and 531c. You then build up a fairly stiff frame, so that it doesn't wobble like a noodle when you load it up with camping gear. Most British touring bikes are built with 631 or 725 these days. They seem to be the best replacements for 531st.

I have attached a Reynolds transfer sheet from the mid-90's or so. It even includes exotics like 708, which was (I think) Raleigh specific. Enjoy!