41Cr4 Steel

Steel name: 41Cr4
Diagram No.: 6540
Type of diagram: TTA
Mat. No. (Wr. Nr.) designation: 1.7035
AISI/SAE designation: 5140
DIN designation: 41Cr4
Chemical composition in weight %: 0.40% C, 0.24% Si, 0.73% Mn, 0.025% P, 1.05% Cr, 0.16% Ni, 0.16% Cu
Steel group: Alloy steels
Note: Curve 1 in Fig. represents dependence of Ac3m on velocity of induction heating vih. For slow heating Ac3 = 801 C (point A at the curve 1). For very fast heating the modified upper criterial temperature Ac3m is distinctly bigger. For velocity of heating vih = 3000 K/s Ac3m = 10750C (point B at the curve 1). Curve 2 in Fig. represents dependence of Ac1m on velocity of induction heating vih. For slow heating Ac1 = 736 C (point C at the curve 2). For very fast heating the modified lower criterial temperature Ac1m is bigger. For vih = 3000 K/s Ac1m = 815 C (point D at the curve 2). The second stage – quenching – makes it possible to achieve the requested martensitic microstructure.
Reference: Not shown in this demo version.

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