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Characteristics of the material 15KH   ( 15H,   15Х ).

Material : 15KH   ( 15H,   15Х )
Substitute: 20Х
Classification : Alloy structurall steel


Chemical composition in % of the material 15KH   ( 15H,   15Х ) .
C Si Mn Ni S P Cr Cu
0.12 - 0.180.17 - 0.370.4 - 0.7max   0.3max   0.035max   0.0350.7 - 1max   0.3


Temperature of critical points of the grade 15KH   ( 15H,   15Х ).
Ac1 = 766 ,      Ac3(Acm) = 838 ,       Ar3(Arcm) = 799 ,       Ar1 = 702


Mechanical properties under Т=20oС of the material 15KH   ( 15H,   15Х ) .
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Forging to 100   390 195 26 55590Normalizing
Forging 100 - 300   390 195 23 50540Normalizing
Bar Ж 15   690 490 12 45690Guenching 880oC, water, Guenching 770 - 820oC, water, Drawing 180oC, air,


    Brinell hardness of the material   15KH   ( 15H,   15Х )   (annealing) ,       HB 10 -1= 179   MPa
    Brinell hardness of the material   15KH   ( 15H,   15Х )   (cold-drawn, cold-worked) ,       HB 10 -1= 207   MPa


Physical properties of the material 15KH   ( 15H,   15Х ) .
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 2.15   44 7830    
100 2.12 10.2 44 7810 496  
200 1.94 11.5 43 7780 508  
300 1.91 12.4 41   525  
400 1.79 13 39 7710 538  
500 1.7 13.5 36   567  
600 1.62 14 33 7640 588  
700 1.42   32   626  
800 1.32   32   706  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 15KH   ( 15H,   15Х ) .
  Weldability: without limitations.
 Flakes : not predisposed
Temper brittleness: not predisposed



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

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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