AISI M43 Knife Steel
Composition Analysis Graph, Equivalents And Overview

M43(AISI) - Cobalt-Molybdenum high speed tool steel. Although, M43 also has Tungsten(W), but it's about 3% which won't produce that many atoms to participate in carbide formation and considerably affect alloy properties, but does improve hardenability. Very close to AISI M46 high speed tool steel, except M43 has more Tungsten(W) and less Vanadium. M43 Can reach up to 70HRC for the record. High on carbides, and because of that it'll be better off with coarse edge. Not an easy alloy to machine, which would explain why it isn't very popular with knifemakers. Never seen in production knives.

Manufacturing Technology - Ingot

Country - United States(US)