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X10CrNiNb18-9 Steel
Steel name: X10CrNiNb18-9
Diagram No.: 5129
Type of diagram: TTP
DIN designation: X10CrNiNb18-9
Mat. No. (Wr. Nr.) designation: 1.4550
Chemical composition in weight %: 0.08% C, 1.00% Si, 2.00% Mn, 0.045% P, 0.015% S, 17.00-19.00% Cr, 9.00-12.00% Cr, Nb (10 x C<=1,00)
Steel group: Austenitic stainless steels
Note: Fig. shows the time-temperature-precipitation diagram of the steel X10CrNiNb18-9 after solution treatment at 1300 °C/water as an example. It is seen that only MX is precipitated
by aging above 900 °C. The particles are granular or in the form of threads, the latter increasing at the expense of the former as the temperature is lowered. The MX threads form along dislocation lines. At all low temperatures MX particles are found within the grains and M23C6 precipitates on the grain boundaries. At temperatures below 750 °C M23C6 starts to precipitate before MX.
Reference: Not shown in this demo version.
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Time-temperature precipitation diagram of the steel X10CrNiNb18-9. 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.