Database of Steel and Alloy (Marochnik)

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Characteristics of the material 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ).

Material : 20KH2N4À   ( 20H2N4À,   20Õ2Í4À )
Substitute: 20ÕÃÍÐ, 15ÕÍ2ÒÀ, 20ÕÃÍÒÐ
Classification : Alloy structurall steel


Chemical composition in % of the material 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ) .
C Si Mn Ni S P Cr Cu
0.16 - 0.220.17 - 0.370.3 - 0.63.25 - 3.65max   0.025max   0.0251.25 - 1.65max   0.3


Temperature of critical points of the grade 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ).
Ac1 = 710 ,      Ac3(Acm) = 800 ,       Ar1 = 640


Mechanical properties under Ò=20oÑ of the material 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ) .
Assortment Dimension Direct. sâ sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar Æ 15   1270 1080 9 45780Guenching and drawing


    Brinell hardness of the material   20KH2N4À   ( 20H2N4À,   20Õ2Í4À )   (annealing) ,       HB 10 -1= 269   MPa


Physical properties of the material 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ) .
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 2.03     7850    
100     24      


Technological properties of the material 20KH2N4À   ( 20H2N4À,   20Õ2Í4À ) .
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: weakly predisposed



Specification :
Mechanical properties :
sâ - 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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