Database of Steel and Alloy (Marochnik)

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Metals -> High-temperature or heat-resistant steel and alloy -> High alloy high-temperature steel

Characteristics of the material 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ).

Material : 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ )
Classification : High alloy high-temperature steel


Chemical composition in % of the material 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ) .
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 of the grade 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ).
Ac1 = 800 ,      Ac3(Acm) = 860


Mechanical properties under Ò=20oÑ of the material 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ) .
Assortment Dimension Direct. sâ sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bars     750 600 15 50600Guenching 1010 - 1060oC, oil, Drawing 660 - 670oC, air,


    Brinell hardness of the material   20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ )   (annealing) ,       HB 10 -1= 229   MPa


Physical properties of the material 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ) .
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


Technological properties of the material 20KH12VNMF   ( 20H12VNMF,   20Õ12ÂÍÌÔ ) .
  Weldability: hard weldability.



Specification :
Mechanical properties :
sâ - 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

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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