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Characteristics for grade     20KH12VNMF   ( 20Х12ВНМФ )

      Grade :   20KH12VNMF   ( 20Х12ВНМФ ) (   2Х12ВНМФ     ЭП428   )
      Classification :   High alloy high-temperature steel
      Equivalent grades:   Go here




Chemical composition in % for grade   20KH12VNMF   ( 20Х12ВНМФ )
C Si Mn Ni S P Cr Mo W V
0.17 - 0.23max   0.60.5 - 0.90.5 - 0.9max   0.025max   0.0310.5 - 12.50.5 - 0.70.7 - 1.10.15 - 0.3


Temperature of critical points for grade   20KH12VNMF   ( 20Х12ВНМФ ).
Ac1 = 800 ,      Ac3(Acm) = 860


Mechanical properties under Т=20oС for grade   20KH12VNMF   ( 20Х12ВНМФ )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 5949-75     740 590 15 50590Guenching 1010 - 1060oC, oil, Drawing 660 - 670oC, air,
Bar, GOST 18968-73     740 590-75515 50590Normalizing and drawing


    Brinell hardness for     20KH12VNMF   ( 20Х12ВНМФ )   (annealing) ,     Bar GOST 5949-75 HB 10 -1 = 229   MPa
    Brinell hardness for     20KH12VNMF   ( 20Х12ВНМФ )   (normalize, tempering) ,     Bar GOST 18968-73 HB 10 -1 = 229 - 269   MPa


Technological properties for grade   20KH12VNMF   ( 20Х12ВНМФ )
  Weldability: hard weldability.


Physical properties for grade   20KH12VNMF   ( 20Х12ВНМФ )
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m
20 2.12     7850    
100 2.07 10.6 25 7830    
200 2.02 10.9 25 7800    
300 1.96 11.2 26 7780    
400 1.9 11.4 26 7760    
500 1.81 11.7 27 7730    
600 1.67 11.9 27 7700    
700   12   7670    
800   12.1        
T E 10- 5 a 10 6 l r C R 10 9



Equivalent steels for grade     20KH12VNMF   ( 20Х12ВНМФ )
Warning! Indicated both exact and nearest equivalents.
USAJapan
-JIS
616
SUH616


Specification :
Mechanical properties :
sв - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture , [ % ]
y - Reduction of area , [ % ]
KCU - Impact strength , [ kJ / m2]
HB - Brinell hardness , [MPa]

Physical properties :
T - Test temperature , [Grade]
E - Young modulus , [MPa]
a - Coefficient of linear expansion (range 20o - T ) , [1/Grade]
l - Termal (heat) condition coefficient , [Watt/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

Weldability :
without limitations - welding is done without heating and subsequent heat treeting
limited weldability - welding is possible under heating up to 100-120 grade and subsequent heat treeting
hard weldability - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing

  20KH12VNMF   ( 20Х12ВНМФ ) - High alloy high-temperature steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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