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Characteristics for grade     18KH2N4MА   ( 18Х2Н4МА )

      Grade :     18KH2N4MА   ( 18Х2Н4МА )
      Substitute:   15Х2ГН2ТРА, 20Х2Н4А
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   18KH2N4MА   ( 18Х2Н4МА )
C Si Mn Ni S P Cr Mo Ti Cu
0.14 - 0.20.17 - 0.370.25 - 0.554 - 4.4max   0.025max   0.0251.35 - 1.650.3 - 0.4max   0.06max   0.3


Temperature of critical points for grade   18KH2N4MА   ( 18Х2Н4МА ).
Ac1 = 700 ,      Ac3(Acm) = 810 ,       Ar3(Arcm) = 400 ,       Ar1 = 350 ,       Mn = 336


Mechanical properties under Т=20oС for grade   18KH2N4MА   ( 18Х2Н4МА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 15   1130 835 12 50980Guenching and drawing


    Brinell hardness for     18KH2N4MА   ( 18Х2Н4МА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 269   MPa


Technological properties for grade   18KH2N4MА   ( 18Х2Н4МА )
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: not predisposed


Physical properties for grade   18KH2N4MА   ( 18Х2Н4МА )
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     7950    
100 1.65 11.7 36 7930    
200 1.41 12.2 36 7900    
300   12.7 35 7860    
400 1.39 13.1 35 7830    
500   13.5 34 7800    
600   13.9 33 7760    
700     32      
800     30      
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     18KH2N4MА   ( 18Х2Н4МА )
Warning! Indicated both exact and nearest equivalents.
GermanyJapanEnglandSpainBulgariaPolandCzechiaAustria
DIN,WNrJIS BSUNEBDSPNCSNONORM
1.6657
14NiCrMo134
GX19NiCrMo4
X19NiCrMo4
SNCM815
832M13
835M15
14NiCrMo131
18Ch2N4MA
18H2N4WA
16720
BOHLERM130


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

  18KH2N4MА   ( 18Х2Н4МА ) - 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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