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X10CrMoVNb9-1   ( 1.4903 )

    Grade :     X10CrMoVNb9-1
    Number:     1.4903
    Classification:     Alloy special martensitic creep-resisting steel
    Density:     7.7   g/cm ³
    EN 10302: 2008 Creep resisting steels, nickel and cobalt alloys
    EN 10028-2: 2009 Flat products made of steels for pressure purposes. Non-alloy and alloy steels with specified elevated temperature properties
    EN 10222-2: 2000 Steel forgings for pressure purposes. Ferritic and martensitic steels with specified elevated temperature properties
    EN 10216-2: 2014 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties
    EN 10253-2: 2007 Butt-welding pipe fittings. Non alloy and ferritic alloy steels with specific inspection requirements
    EN 10088-1: 2005 Stainless steels. List of stainless steels
    Equivalent grades:     No information

Chemical composition %   of grade   X10CrMoVNb9-1 (1.4903):   EN 10302-2008
0.2 =Si=<0.5; P=<0.02; S=<0.005; Al=<0.02; Cu=<0.3; Ti=<0.01 according EN 10216-2:2014
C Si Mn Ni P S Cr Mo V N NbAl
0.08 - 0.12max   0.50.3 - 0.6max   0.4max   0.025max   0.0158 - 9.50.85 - 1.050.18 - 0.250.03 - 0.070.06 - 0.1max   0.03

Mechanical properties of grade   X10CrMoVNb9-1 (1.4903)

Nominal thickness (mm):   to 6060 - 150150 - 250
Rm - Tensile strength (MPa)580-760550-730520-700
Rm - Tensile strength (MPa) (+QT)620-850

Nominal thickness (mm):   to 6060 - 250
ReH - Minimum yield strength (MPa)445435

Rp0.2 0.2% proof strength (MPa) (+QT)450

KV - Impact energy (J) transverse, (+NT)-20°

KV - Impact energy (J) longitud., (+NT)+20°

A - Min. elongation at fracture (%) 18-20

Mechanical properties
ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d elasticite minimale
Rm Tensile strength / Zugfestigkeit / Resistance a la traction
A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc

Heat treatment conditions

+A Soft annealed
+AC Annealed to achieve spheroidization of the carbides
+AR As rolled
+AT Solution annealed
+C Cold drawn / hard
+CR Cold rolled
+FP Treated to ferrite-pearlite structure and hardness range
+I Isothermal annealing
+LC Cold drawn / soft
+M Thermo mechanical rolling
+N Normalized
+NT Normalized and tempered
+P Precipitation hardened
+PE Peeled
+QA Air quenched and tempered
+QL Liquid quenched and tempered
+QT Quenched and tempered
+S Treated to improve shearability
+SH As rolled and turned
+SR Cold drawn and stress relieved
+T Tempered
+TH Treated to hardness range
+WW Warm worked
+U Untreated

  X10CrMoVNb9-1 (1.4903) - Alloy special martensitic creep-resisting steel
Chemical composition , Equivalent grades of Steel, Standards, Mechanical Properties, Hardness , Strength , Elongation

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