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Characteristics for grade     15KH   ( 15Х )

      Grade :     15KH   ( 15Х )
      Substitute:   20Х
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   15KH   ( 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 for grade   15KH   ( 15Х ).
Ac1 = 766 ,      Ac3(Acm) = 838 ,       Ar3(Arcm) = 799 ,       Ar1 = 702


Mechanical properties under Т=20oС for grade   15KH   ( 15Х )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe cooling strain, GOST 8733-74     412   19    
Bar, GOST 4543-71 Ø 15   690 490 12 45690Guenching 880oC, water, Guenching 770 - 820oC, water, Drawing 180oC, air,
Forging to 100   390 195 26 55590Normalizing
Forging 100 - 300   390 195 23 50540Normalizing


    Brinell hardness for     15KH   ( 15Х )   (annealing) ,       GOST 4543-71 HB 10 -1 = 179   MPa
    Brinell hardness for     15KH   ( 15Х )   (cold-worked) ,       GOST 4543-71 HB 10 -1 = 217   MPa
    Brinell hardness for     15KH   ( 15Х )   ,     Pipe GOST 8733-74 HB 10 -1 = 179   MPa
    Brinell hardness for     15KH   ( 15Х )   ,     Bar GOST 10702-78 HB 10 -1 = 156   MPa


Technological properties for grade   15KH   ( 15Х )
  Weldability: without limitations.
 Flakes : not predisposed
Temper brittleness: not predisposed


Physical properties for grade   15KH   ( 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


Equivalent steels for grade     15KH   ( 15Х )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanBelgiumSpainChinaBulgariaPolandRomaniaCzechiaSouth Korea
-DIN,WNrJIS AFNORBSEN NBNUNEGBBDSPNSTASCSNKS
5015
5115
G50150
G51150
G51170
G61180
1.7015
13Cr2
15Cr3
17Cr3
SCr415
SCr415H
12C3
12C8
15Cr2RR
17Cr3
18C3
17Cr3
523M15
1.7014
1.7016
15Cr2
15Cr2KD
17Cr3
17CrS3
15Cr2
17Cr3
15Cr
15CrA
ML15Cr
15Ch
15H
15Cr9q
14120
SCr415
SCr415H

Types of delivery of grade   15KH   ( 15Х )
B03 - Metal forming treatment. Forgings
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
В62 - Steel pipes and connecting parts to them
В71 - Low-carbon steel wire


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

  15KH   ( 15Х ) - 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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