Steel name: C-Mn-Nb Steel
  Diagram No.: 3683
  Type of diagram: CCT
  Chemical composition in weight %:
  Steel 1: 0.143% C, 0.438% Si, 1.599% Mn, 0.003% S, 0.022% P, 0.025% Ni, 0.027% Cr,
  0.017% Mo, 0.003% V, <0.001% Nb, 0.017% Cu, 0.002% Ti.
  Steel 2: 0.142% C, 0.437% Si, 1.577% Mn, 0.003% S, 0.022% P, 0.024% Ni, 0.026% Cr,
  0.016% Mo, 0.003% V, 0.002% Ti, 0.011% Nb, 0.017% Cu.
  Steel 3: 0.149% C, 0.445% Si, 1.607% Mn, 0.003% S, 0.024% P, 0.026% Ni, 0.027% Cr,
  0.016% Mo, 0.003% V, 0.026% Nb, 0.018% Cu, 0.002% Ti.
  Note: Microalloyed steel. Austenitized at 1250^oC for 3 s. See the diagrams No. 3676,
  No. 3677, No. 3678, No. 3679, No. 3680, No. 3681, No. 3682 and No. 3684.
  Note: A study of the effect of niobium in solid solution in microalloyed austenite on the
  kinetics of transformation to bainite after cooling.
  Source: G.I. Rees, J. Perdrix, T. Maurickx and H.K.D.H. Bhadeshia, "The effect of niobium
  in solid solution on the transformation kinetics of bainite", Materials Science and
  Engineering, A194 (1995), 179-186.

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