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Xl2CrMo7 Steel
Steel name: Xl2CrMo7
Diagram No.: 5121
Type of diagram: CCT
DIN designation: Xl2CrMo7
Mat. No. (Wr. Nr.) designation: 1.7368
Chemical composition in weight %: max. 0.15% C, 0.50-1.00% Si, 0.30-0.60% Mn, max. 0.030% P, max. 0.030% S, 6.00-8.00% Cr, 0.45-0.65% Mo
Steel group: Hydrogen-resistant boiler steels
Note: Due to the high chromium and silicon contents, ferrite is formed only on slow cooling. An M2X eutectoid is formed instead of pearlite. Cementite is formed only on tempering the martensite. The bainite transformation is suppressed. In the pre-eutectoid ferrite M23C6 and M2X are precipitated on the ferrite grain boundaries.The M2X phase of this steel has a high chromium content, leading to a lowering of the lattice constant.
Reference: Not shown in this demo version.
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Time-temperature-transformation and phase diagram with phase volume fractions and hardness for continuous cooling of the steel X12CrMo7. Click the image to enlarge the diagram.
Disclaimer: The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.