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Characteristics of the material 12KHN2   ( 12HN2,   122 ).

Material : 12KHN2   ( 12HN2,   122 )
Substitute: 20, 20, 123, 18, 20
Classification : Alloy structurall steel


Chemical composition in % of the material 12KHN2   ( 12HN2,   122 ) .
C Si Mn Ni S P Cr Cu
0.09 - 0.160.17 - 0.370.3 - 0.61.5 - 1.9max   0.035max   0.0350.6 - 0.9max   0.3


Temperature of critical points of the grade 12KHN2   ( 12HN2,   122 ).
Ac1 = 715 ,      Ac3(Acm) = 773 ,       Ar3(Arcm) = 726 ,       Ar1 = 659 ,       Mn = 405


Mechanical properties under =20o of the material 12KHN2   ( 12HN2,   122 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Steel 30 550 420 29 793630Guenching 880oC, oil, Drawing 600oC, water,
Steel 30 550 420 29 793630Guenching 880oC, oil, Drawing 600oC, water,
Bar 15   800 600 12 50  


    Brinell hardness of the material   12KHN2   ( 12HN2,   122 )   (annealing) ,       HB 10 -1= 207   MPa


Physical properties of the material 12KHN2   ( 12HN2,   122 ) .
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 2.11   38 7880   330
100 2.03 10.5 38   494 360
200 1.96 11.5 37   507 430
300 1.9 11.9 35   523 520
400 1.76 12.4 33   536 590
500 1.72 12.9 31   565 670
600 1.54 13.6 30   586  
700 1.41 13.9 29   624  
800 1.3 11.7 29   703 1050
900           1120
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 12KHN2   ( 12HN2,   122 ) .
  Weldability: limited weldability.
 Flakes : not predisposed
Temper brittleness: 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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