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Characteristics for grade     37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )

      Grade :   37KH12N8G8MFB   ( 37Х12Н8Г8МФБ ) (   4Х12Н8Г8МФБ     ЭИ481   )
      Classification :   High alloy high-temperature steel
      Equivalent grades:   Go here



Chemical composition in % for grade   37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )
C Si Mn Ni S P Cr Mo V Nb Cu
0.34 - 0.40.3 - 0.87.5 - 9.57 - 9max   0.03max   0.03511.5 - 13.51.1 - 1.41.25 - 1.550.25 - 0.45max   0.3


Mechanical properties under Т=20oС for grade   37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      1000 600 20 25350Heating 1140 - 1160oC, 1h,Cooling water, Ageing 660 - 790oC, 10 - 16h, air,


    Brinell hardness for     37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )   (annealing) ,     Bar GOST 18907 HB 10 -1 = 269   MPa


Technological properties for grade   37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )
  Weldability: limited weldability.


Physical properties for grade   37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )
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 1.74     7850   740
100   15.9 17.2     850
200 1.6 17.1 18.5     900
300 1.5 18.2 19.7     950
400 1.43 19.2 21.4     1010
500 1.35 20.3 23     1100
600 1.28 21.2 24.8     1150
700 1.25 22.2 25.9     1200
800   23.2 27.2      
900   24.2 29.3      
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     37KH12N8G8MFB   ( 37Х12Н8Г8МФБ )
Warning! Indicated both exact and nearest equivalents.
China
GB
GH2036


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

  37KH12N8G8MFB   ( 37Х12Н8Г8МФБ ) - 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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