1.2311, 1.2738, 1.2738 mod. Steels

Steel name: 1.2311, 1.2738, 1.2738 mod.
Diagram No.: 8252
Type of diagram: CCT
Mat. No. (Wr. Nr.) designation: 1.2311, 1.2738, 1.2738 mod.
Chemical composition in weight %:
1.2311 steel: 0.38% C, 0.30% Si, 1.50% Mn, 0.020% P, 0.003% S, 2.00% Cr, 0.20%
1.2738 steel: 0.38% C, 0.30% Si, 1.50% Mn, 0.020% P, 0.003% S, 2.00% Cr, 0.20% Mo, 1.00% Ni
1.2738 mod. steel: 0.26% C, 0.10% Si, 1.45% Mn, 0.015% P, 0.002% S, 1.25% Cr, 0.60% Mo, 1.05% Ni, 0.12% V
Steel group: Plastic mould steels
Note: The challenges in large molds. (a) Hardness and section size for modified P20 grades, all with surface hardness of 32 HRC. (b) Continuous cooling transformation (CCT) diagram for 1.2738 and 1.2711 steels, showing the occurrence of pearlite in earlier times for the 1.2711 steel, which explains the decrease of core hardness in the large-diameter blocks. Thruhard Supreme is a developed composition by Buderus Edelstahl. (Results adapted from Hippenstiel, F. et al., Handbook of Plastic Mould Steels, Edelstahlwerke Buderus AG, Wetzlar, Germany, 2001, pp. 17, 40, 67, 125–149, 248–251.).
Reference: Not shown in this demo version.

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