Steel name: Nb–Ti Low-Carbon Line-Pipe Steel
  Diagram No.: 3469
  Type of diagram: CCT
  Chemical composition in weight %: 0.066% C, 0.26% Si, 1.583% Mn, 0.001% Mo,
  0.037% Nb, 0.017% Ti, 0.037% Al, 12ppm O.
  Note: Nb–Ti-microalloyed line-pipe steel. The strain affected CCT diagrams of the Mo-free
  alloy, after a single pass compression strain in the austenite of 0.6 at 860 °C
  at a strain rate of 0.5 s^-1. PF – polygonal ferrite, P – pearlite, AF – acicular ferrite and
  B – bainite. See the diagrams No. 3467, No. 3468 and No. 3470.
  Source: Zhenghua Tang and Waldo Stumpf, "The role of molybdenum additions and prior
  deformation on acicular ferrite formation in microalloyed Nb–Ti low-carbon line-pipe
  steels", Materials Characterization, 2007, in press.

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