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Characteristics for grade     KhN78T   ( ХН78Т )

      Grade :   KhN78T   ( ХН78Т ) (   ЭИ435   )
      Substitute:   ХН38ВТ, 12Х25Н16Г7АР, 20Х23Н18
      Classification :   Hidh-temperature or heat-resistant alloy
      Equivalent grades:   Go here



Chemical composition in % for grade   KhN78T   ( ХН78Т )
Fe C Si Mn Ni S P Cr Ti
max   6max   0.12max   0.8max   0.770.003 - 80.85max   0.012max   0.01519 - 220.15 - 0.35


Mechanical properties under Т=20oС for grade   KhN78T   ( ХН78Т )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Sheet, GOST 24982-81 to 3.9   860   35   Guenching 980 - 1020oC,Cooling air,
Sheet, GOST 24982-81 4 - 11   880   30   Guenching 980 - 1020oC,Cooling air,
Forging, GOST 25054-81 to 600 longitudinal 588 196 25-3035-40 Guenching


    Brinell hardness for     KhN78T   ( ХН78Т )   (quenching) ,       GOST 25054-81 HB 10 -1 = 200   MPa


Technological properties for grade   KhN78T   ( ХН78Т )
  Weldability: hard weldability.


Physical properties for grade   KhN78T   ( ХН78Т )
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 2.24     8400   1090
100 2.19 12.2 14.6 8380   1099
200 2.13 13 16.7 8340   1108
300 2.06 13.4 18.5 8310   1117
400 2 13.8 20.6 8260   1127
500 1.93 14.1 22.7 8220   1153
600 1.84 14.7 24.8 8180   1135
700   15.4 26.8 8130   1126
800   15.5 28.9 8090   1123
900       8040    
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     KhN78T   ( ХН78Т )
Warning! Indicated both exact and nearest equivalents.
USAGermanyChina
-DIN,WNrGB
N06025
2.4951
NiCr20Ti
GH3030


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

  KhN78T   ( ХН78Т ) - Hidh-temperature or heat-resistant alloy: 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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