Steel name: 1% Ni Steel
  Diagram No.: 1570
  Type of diagram: TTT
  BS designation: En 12
  Chemical composition in weight %: 0.34% C, 0.20% Si, 1.06% Mn, 0.04% S, 0.037% P,
  0.75% Ni, 0.08% Cr, 0.02% Mo.
  Note: Structural steel. Austenitizing temperature: 845^oC. As quenched grain size: 7 & 8.
  McQuaid-Ehn grain size: 3.
  Hardness values in bold figures are shown of the fully transformed steel; the values in
  italics represent structures developed by holding at the selected temperatures for 24
  hours and then quenching to room temperature.
  Source: George F. Vander Voort, Atlas of Time-Temperature Diagrams for Irons and
  Steels, ASM International, USA, 1991, p.83.

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