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Characteristics for grade     50KHN   ( 50ХН )

      Grade :     50KHN   ( 50ХН )
      Substitute:   40ХН, 60ХГ
      Classification :   Alloy structurall steel
      Equivalent grades:     Is absent



Chemical composition in % for grade   50KHN   ( 50ХН )
C Si Mn Ni S P Cr Cu
0.46 - 0.540.17 - 0.370.5 - 0.81 - 1.4max   0.035max   0.0350.45 - 0.75max   0.3


Temperature of critical points for grade   50KHN   ( 50ХН ).
Ac1 = 735 ,      Ac3(Acm) = 755 ,       Ar3(Arcm) = 690 ,       Ar1 = 660 ,       Mn = 300


Mechanical properties under Т=20oС for grade   50KHN   ( 50ХН )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   1080 885 9 40490Guenching 820oC, water, Drawing 530oC, water,


    Brinell hardness for     50KHN   ( 50ХН )   (annealing) ,       GOST 4543-71 HB 10 -1 = 207   MPa
    Brinell hardness for     50KHN   ( 50ХН )   ,     Bar GOST 10702-78 HB 10 -1 = 197   MPa


Technological properties for grade   50KHN   ( 50ХН )
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   50KHN   ( 50ХН )
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       7860    
100   11.8 43   500  
200     40   510  
300   12.3 39   560  
400   13.4 38   630  
500   14 37   700  
600     36   800  
700     32   910  
800     23   650  
900     24   610  
1000         700  
T E 10- 5 a 10 6 l r C R 10 9


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

  50KHN   ( 50ХН ) - Alloy structurall 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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