Steel name: Low Carbon 2.4-4.15% Steels
  Diagram No.: 2479
  Type of diagram: TTT
  Chemical composition in weight %: Alloy C1: 0.16% C, <0.02% Ni, 2.40% Cr, <0.02% Mo,
  <0.001% B. Alloy C2: 0.17% C, <0.02% Ni, 3.16% Cr, <0.02% Mo, <0.001% B. Alloy C3:
  0.14% C, <0.02% Ni, 3.83% Cr, <0.02% Mo, <0.001% B. Alloy C4: 0.15% C, <0.02% Ni,
  4.15% Cr, <0.02% Mo, <0.001% B.
  Note: Alloy steel. Austenitizing temperature: Alloy C1: 1000^oC (1830^oF) for 15 min.
  Alloy C2: 1000^oC (1830^oF) for 15 min. Alloy C3: 1000^oC (1830^oF) for 15 min.
  Alloy C4: 1000^oC (1830^oF) for 15 min.
  Source: D.J. Swindan, J.H. Woodhead, "Kinetics of the Nucleation and Growth of
  Proeutectoid Ferrite in Some Carbon-Chromium Alloys", Journal of The Iron and Steel
  Institute, Vol.209, November 1971, p.883-899.

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