Steel name: SAE 1050
  Diagram No.: 2872
  Type of diagram: TTE
  SAE designation: 1050
  Chemical composition in weight %: 0.46% C, 0.75% Mn, 0.02% P, 0.034% S,
  0.03% Ni, 0.12% Cr.
  Note: Embrittlement diagram. Temper embrittlement. Treatment: Specimens hardened
  by heating to 830^oC (1525^oF) for 30 min and brine quenching. Prior to isothermal
  embrittlement treatment, all specimens were tempered by induction heating to 650^oC
  (1200^oF) for 5 s. Curves are based on transition temperature determined by 50% fibrous
  fracture. Figures beside points represent the increase in transition temperatures in
  degrees Fahreinheit from the unembrittled condition.
  Source: J.F. Libsch, et al., "Temper Embrittlement in Plain Carbon Steel:", Transactions
  of the ASM, Vol.44, ASM, 1952, p.1058.

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