More from the 1891 report
Gun Steels
https://books.google.com/books?id=-c8xAAAAMAAJ&pg=PA196&dq
Witten & Bofors were AISI 1044 - good stuff.
Looks like Krupp was having problems getting enough Manganese into their carbon steels at that point. Later Fluss Stahl was 1045 so they figured it out.