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Characteristics for grade     12KHN3А   ( 12ХН3А )

      Grade :     12KHN3А   ( 12ХН3А )
      Substitute:   12ХН2, 20ХН3А, 25ХГТ, 12Х2Н4А, 20ХНР
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   12KHN3А   ( 12ХН3А )
C Si Mn Ni S P Cr Cu
0.09 - 0.160.17 - 0.370.3 - 0.62.75 - 3.15max   0.025max   0.0250.6 - 0.9max   0.3


Temperature of critical points for grade   12KHN3А   ( 12ХН3А ).
Ac1 = 715 ,      Ac3(Acm) = 773 ,       Ar3(Arcm) = 726 ,       Ar1 = 659 ,       Mn = 380


Mechanical properties under Т=20oС for grade   12KHN3А   ( 12ХН3А )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe, GOST 21729-76     490   16    
Bar, GOST 4543-71 Ø 15   930 685 11 55880Guenching and drawing


    Brinell hardness for     12KHN3А   ( 12ХН3А )   (annealing) ,       GOST 4543-71 HB 10 -1 = 217   MPa


Technological properties for grade   12KHN3А   ( 12ХН3А )
  Weldability: limited weldability.
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   12KHN3А   ( 12ХН3А )
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     7850    
100   11.8 31 7830    
200   13   7800    
300   14   7760    
400   14.7 26 7720 528  
500   15.3   7680 540  
600   15.6   7640 565  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     12KHN3А   ( 12ХН3А )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandSpainBulgariaHungaryPolandRomaniaCzechia
-DIN,WNrJIS AFNORBSUNEBDSMSZPNSTASCSN
3415
1.5732
12Ni14
14NiCr10
14NiCr14
SNC815
SNC815H
10NC11
14NC11
655M13
15NiCr11
12ChN3A
BNC2
12HN3A
13CrNi30q
16420

Types of delivery of grade   12KHN3А   ( 12ХН3А )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
В62 - Steel pipes and connecting parts to them
В71 - Low-carbon steel wire


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

  12KHN3А   ( 12ХН3А ) - 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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