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X11CrMoWVNb9-1 Steel
Steel name: X11CrMoWVNb9-1
Diagram No.: 4955
Type of diagram: CCT
Mat. No (Wr.Nr) designation: 1.4905
DIN designation: X11CrMoWVNb9-1
SAE designation: (T/P911)
Chemical composition in weight %: 0.115% C, 0.20% Si, 0.51% Mn, 0.017% P, 0.002% S, 8.85% Cr, 0.94% Mo, 0.24% Ni, 0.22% V, 0.95% W, 0.084% N, 0.069% N, 0.07% Al
Steel group: Creep resistant ferritic steels
Note: Austenitizing temperature: 1060 C/30 min. T/P911 and T/P92 are currently the focal point of interest in Europe. They are intended for use in main steam lines. On the other hand T/P122 is more preferred for use as boiler components because of its higher oxidation resistance. It is not favored for use as thick section components. The disadvantages of T/P122 are mainly found in the area of fabricability. Due to the high copper content, its low AC1b temperature entails longer tempering times at lower temperatures when the steel has to be tempered after hot working and welding. The same applies to the final heat treatment after pipe production. Moreover, it appears that, under the conditions of creep, the softening of the HAZ in such a copper-bearing steel tends to be more pronounced than it is usually known with 9-12% chromium steels.
Reference: Not shown in this demo version.
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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.