Explanatory notes
… steel are manganese, nickel, chromium, tungsten (wolfram), molybdenum, vanadium and cobalt; the most common non‑metal … containing the following elements : chromium, manganese, molybdenum, nickel, silicon and vanadium. (2) Alloy steels … (containing manganese, silicon and possibly chromium or molybdenum) and other alloy steels for springs. (8) …
