1.4021 Steel

Steel name: 1.4021
Diagram No.: 5108
Type of diagram: CCT
DIN designation: X20Cr13
Mat. No. (Wr. Nr.) designation: 1.4021
Chemical composition in weight %: 0.18-0.22% C, max. 1.00% Si, max. 1.00% Mn, max. 0.045% P, max. 0.030% S, 12.00-14.00% Cr
Steel group: Stainless steels
Note: Austenitizing temperature: 1020 C, 20 min.
From the time-temperature-transformation and phase diagram given in Fig, it may be seen that the precipitation of M23C6 occurs already in the austenite. At very low cooling rates, leading to transformation in the ferrite range, double borders of the phases M2X and M23C6 are formed by a eutectoid reaction, becoming coarser with increasing cooling time. The bainite transformation is suppressed in this steel. In the tempered condition the precipitation of M23C6 is to be expected.
Reference: Not shown in this demo version.

Transformation Diagram

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