Database of Steel and Alloy (Marochnik)

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Characteristics of the material 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ).

Material : 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ) ( 40ÕÍÌÀ )
Substitute: 40ÕÃÒ, 40ÕÃÐ, 30Õ3ÌÔ, 45ÕÍ2ÌÔÀ
Classification : Alloy structurall steel


Chemical composition in % of the material 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ) .
C Si Mn Ni S P Cr Mo Cu
0.37 - 0.440.17 - 0.370.5 - 0.81.25 - 1.65max   0.025max   0.0250.6 - 0.90.15 - 0.25max   0.3


Temperature of critical points of the grade 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ).
Ac1 = 730 ,      Ac3(Acm) = 820 ,       Ar3(Arcm) = 550 ,       Ar1 = 380 ,       Mn = 320


Mechanical properties under Ò=20oÑ of the material 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ) .
Assortment Dimension Direct. sâ sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar Æ 25   1080 930 12 50780Guenching and drawing


    Brinell hardness of the material   40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ )   (annealing) ,       HB 10 -1= 269   MPa


Physical properties of the material 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ) .
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   39 7850   331
100 2.11 11.6 38   490  
200 2.01 12.1 37   506  
300 1.9 12.7 37   522  
400 1.77 13.2 35   536  
500 1.73 13.6 33   565  
600   13.9 31      
700     29      
800     27      
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 40KHN2MÀ   ( 40HN2MÀ,   40ÕÍ2ÌÀ ) .
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: not 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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