X20CrMoV121 and P91 Steels

X20CrMoV121 and P91 Steels

Steel name: X20CrMoV121 and P91
Diagram No.: 1706
Mat.No. (Wr.Nr.) designation: Steel P91: 1.4903
DIN designation: Steel P91: X10CrMoVNb9-1
Chemical composition in weight %:
X20CrMoV121 steel: 0.2% C, 0.29% Si, 0.52% Mn, 0.019% P, 0.011% S, 11% Cr, 0.94% Mo, 0.64% Ni, 0.31% V, 0.059% Cu, 0.024% Nb, 0.032% Al, 0.017% N
P91 steel: 0.1% C, 0.38% Si, 0.48% Mn, 0.012% P, 0.002% S, 7.9% Cr, 0.98% Mo, 0.26% Ni, 0.23% V, 0.14% Cu, 0.11% Nb, 0.016% Al, 0.064% N
Steel group: Creep resistant steels
Applications: Steels for pipelines.
Note: Actual and calculated dependences of the hardness of the X20CrMoV121 and P91 steels on the tempering time at 650 °C and 750 °C.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: No data
Tempering: See the digaram

Tempering Diagram

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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