Steel name: AISI M4
  Diagram No.: 4012
  Type of diagram: CCT
  AISI designation: M4
  Chemical composition in weight %: 1.29% C, 0.40% Mn, 0.03% P, 0.02% S, 4.03% Cr, 4.43% Mo,
  5.26% W, 3.82% V.
  Note: High speed tool steel. Comparison between the diagram obtained in this study with that
  of the manufacturer.
  Source: Jalel Briki and Souad Ben Slima, A New Continuous Cooling Transformation Diagram for AISI M4
  High-Speed Tool Steel, Journal of Materials Engineering and Performance, Volume 17(6) December
  2008, pp. 864-869.

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