Steel name: 3Mn 20B Steel
  Diagram No.: 2814
  Type of diagram: TTP
  Chemical composition in weight %: 0.061% C, 3.02% Mn, 0.23% Si, 0.008% Al,
  0.0009% N, 0.0020% B.
  Note: Precipitation diagram. Boron Precipitation. Austenitizing temperature: 1350^oC
  (2460^oF). Isothermal segregation and precipitation curves for boron in two C-Mn-B
  steels. See the diagram No. 2813.
  Source: M. Ueno, T. Inoue, "Distribution of Boron at Austenite Grain Boundaries and
  Bainite Transformation in Low Carbon Steel", Transactions ISIJ, Vol.13, ISIJ, 1973, p.210.

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