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Characteristics of the material 18KH2N4M   ( 18H2N4M,   1824 ).

Material : 18KH2N4M   ( 18H2N4M,   1824 )
Substitute: 1522, 2024
Classification : Alloy structurall steel


Chemical composition in % of the material 18KH2N4M   ( 18H2N4M,   1824 ) .
C Si Mn Ni S P Cr Mo Cu
0.14 - 0.20.17 - 0.370.25 - 0.554 - 4.4max   0.025max   0.0251.35 - 1.650.3 - 0.4max   0.3


Temperature of critical points of the grade 18KH2N4M   ( 18H2N4M,   1824 ).
Ac1 = 700 ,      Ac3(Acm) = 810 ,       Ar3(Arcm) = 400 ,       Ar1 = 350 ,       Mn = 336


Mechanical properties under =20o of the material 18KH2N4M   ( 18H2N4M,   1824 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 15   1130 835 12 50980Guenching and drawing


    Brinell hardness of the material   18KH2N4M   ( 18H2N4M,   1824 )   (annealing) ,       HB 10 -1= 269   MPa


Physical properties of the material 18KH2N4M   ( 18H2N4M,   1824 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
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


Technological properties of the material 18KH2N4M   ( 18H2N4M,   1824 ) .
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: not predisposed



Specification :
Mechanical properties :
s - 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/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

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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