Steel name: HSLA Steel
  Diagram No.: 3521
  Type of diagram: CCT
  Chemical composition in weight %: 0.051% C, 0.25% Si, 1.92% Mn, 0.067% Ti+Nb,
  1.10% Mo+Ni+Cr, 40 ppm N, 15 ppm B.
  Note: HSLA steel. Non-deformed CCT diagram for alloy with boron. P-pearlite,
  QPF-quasi-polygonal ferrite, AF-acicular ferrite, GB-granular bainite, BF-bainitic ferrite,
  M-martensite. See the diagrams No. 3519, No. 3520 and No. 3522.
  Source: H.J. Jun, J.S. Kang, D.H. Seo, K.B. Kang, C.G. Park, "Effects of deformation and
  boron on microstructure and continuous cooling transformation in low carbon HSLA
  steels", Materials Science and Engineering A, 422 (2006), 157–162.

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