Steel name: 8630
  Diagram No.: 4
  Type of diagram: CCT and TTT
  Mat. No. (Wr. Nr.) designation: 1.6545
  AISI designation: 8630
  DIN designation: 30NiCrMo2-2
  Chemical composition in weight %: 0.28-0.33% C, 0.70-0.90% Mn, Max. 0.035% P,
  Max. 0.04% S, 0.15-0.30% Si, 0.40-0.60% Cr, 0.40-0.70% Ni, 0.15-0.25% Mo.
  Note: Nickel-chromium-molybdenum steel.
  Source: ASM, Heat Treating Cleaning and Finishing, 8th Edition, Vol.2, 1964, p.17.

  
  Click the image to enlarge the diagram.