40MnSiCrMoB4 Steel

Steel name: 40MnSiCrMoB4
Diagram No.: 8128
Type of diagram: CCT
Mat. No. (Wr. Nr.) designation: 1.5176
DIN designation: 40MnSiCrMoB4
Chemical composition in weight %: 0.32-0.42% C, 0.60-1.30% Si, 0.80-1.40% Mn, 0.60-1.20% Cr, <0.30% Mo, plus others V, Nb, B
Steel group: Bainitic steels
Note: CCT diagram for 40MnSiCrMoB4 steel grade obtained for austenitisation conditions 1050 °C / 7 min leading to a grain size 6-7 ASTM. Dotted curve represents cooling of instrumented light vehicle crankshaft.
Reference: K. Maminska, A. Roth, E. d’Eramo, F. Marchal, A. Galtier, T. Sourmail, A new bainitic forging steel for surface induction hardened components, Conference: SCT 2017 - 5th International Conference on Steels in Cars and Trucks At: Amsterdam, June 2017, pp. 1-8.

Transformation Diagram


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