Steel name: 0.025% C Steel
  Diagram No.: 3657
  Type of diagram: TTT
  Chemical composition in weight %: 0.025% C, 0.24% Si, 1.56% Mn, 0.0006% S,
  0.0020% P, 0.32% Mo, 0.039% Nb, 0.019% V, 0.0062% N, 0.0043% O.
  Note: Low-carbon microalloyed steel. Legend:A-austenite; PF-polygonal ferrite; P-pearlite;
  MF-massive ferrite; BF-bainite ferrite.
  See the diagram No. 3656.
  Source: Furen Xiaoa, Bo Liao, Yiyin Shan and Ke Yang, "Isothermal transformation of
  low-carbon microalloyed steels", Materials Characterization, 54 (2005), 417–422.

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