Steel name: Nb Microaloyed Steel
  Diagram No.: 3789
  Type of diagram: TTP
  Chemical composition in weight %: 0.045% C, 0.425% Mn, 0.008% Si, 0.012% P, 0.021% Nb,
  0.0041% N, 0.043% Al.
  Note: TTP diagram for the microalloyed steel.
  Source: José F. CHÁVEZ-ALCALÁ, et al., Microstructural Characterization of Precipitation in an
  Isothermally Aged Nb-containing Microalloyed Steel, ISIJ International, Vol. 41 (2001), No. 12,
  pp. 1532–1534.

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