Explanatory notes
… nickel, chromium, tungsten (wolfram), molybdenum, vanadium and cobalt; the most common non‑metal additive is … (silicon steels); improved tempering qualities (e.g., vanadium steels); or increased cutting speed (e.g., … : chromium, manganese, molybdenum, nickel, silicon and vanadium. (2) Alloy steels having improved tensile strength …