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Characteristics for grade     12KHN2   ( 12ХН2 )

      Grade :     12KHN2   ( 12ХН2 )
      Substitute:   20ХНР, 20ХГНР, 12ХН3А, 18ХГТ, 20ХГР
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   12KHN2   ( 12ХН2 )
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 for grade   12KHN2   ( 12ХН2 ).
Ac1 = 715 ,      Ac3(Acm) = 773 ,       Ar3(Arcm) = 726 ,       Ar1 = 659 ,       Mn = 405


Mechanical properties under Т=20oС for grade   12KHN2   ( 12ХН2 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe, GOST 8731-87     539 392 14    
Bar, GOST 4543-71 Ø 15   780 590 12 50880Guenching and drawing


    Brinell hardness for     12KHN2   ( 12ХН2 )   (annealing) ,       GOST 4543-71 HB 10 -1 = 207   MPa


Technological properties for grade   12KHN2   ( 12ХН2 )
  Weldability: limited weldability.
 Flakes : not predisposed
Temper brittleness: predisposed


Physical properties for grade   12KHN2   ( 12ХН2 )
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 2.11   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


Equivalent steels for grade     12KHN2   ( 12ХН2 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyFranceEnglandEuropeanItalyChinaSwedenPolandCzechia
-DIN,WNrAFNORBSEN UNIGBSSPNCSN
Gr.4320
1.5713
15CrNi4
15CrNi6
16NC6
815M17
15NiCr6
16CrNi4
12CrNi2
2511
2512
15HN
16220

Types of delivery of grade   12KHN2   ( 12ХН2 )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
В62 - Steel pipes and connecting parts to them


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

  12KHN2   ( 12ХН2 ) - 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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