42CrMo4 Steel

Steel name: 42CrMo4
Diagram No.: 5019
Type of diagram: CCT
Mat. No (Wr.Nr) designation: 1.7225
DIN designation: 42CrMo4
EN designation: 42CrMo4
AISI/SAE designation: 4142
Chemical composition in weight %: 0.41% C, 0.336% Si, 0.701% Mn, 0.011% P, 0.025% S, 0.998% Cr, 0.171% Mo, 0.191% Ni, 0.380% Cu, 0.029% Al, 0.019% Nb
Steel group: Structural steels
Note: Austenitizing temperature: 850 C. Deformation CCT diagrams for the materials 42CrMo4 for logarithmic strains of 0 (top), 0.16 (centre) and 0.35 (bottom), austenitising temperature 850 °C. The CCT diagram for the steel 42CrMo4 exhibits ferritic, pearlitic, bainitic and martensitic constituents. The measured upper critical cooling rate is 15 K s-1. Bainite is formed at cooling rates of between 6 K s-1 and 0.3 K s-1. Ferrite and pearlite can be established at cooling rates from 1 K s-1 and less. Between the regions of martensite and bainite formation as well as between bainite and pearlite formation there is a temperature interval which is free of transformations.
Reference: Not shown in this demo version.

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