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Characteristics for grade     20KHN4FА   ( 20ХН4ФА )

      Grade :     20KHN4FА   ( 20ХН4ФА )
      Substitute:   18Х2Н4МА
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here
Grade   20KHN4FА   ( 20ХН4ФА ):   supplier   Auremo   www.auremo.biz
Sale:   Russia +7 (812) 680-16-77 ,   Germany +49 (208) 205-83-073,     info [a] auremo.org



Chemical composition in % for grade   20KHN4FА   ( 20ХН4ФА )
C Si Mn Ni S P Cr V Cu
0.17 - 0.240.17 - 0.370.25 - 0.553.75 - 4.15max   0.025max   0.0250.7 - 1.10.1 - 0.18max   0.3


Temperature of critical points for grade   20KHN4FА   ( 20ХН4ФА ).
Ac1 = 710 ,      Ac3(Acm) = 750 ,       Mn = 310


Mechanical properties under Т=20oС for grade   20KHN4FА   ( 20ХН4ФА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   880 685 12 50980Guenching and drawing


    Brinell hardness for     20KHN4FА   ( 20ХН4ФА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 269   MPa


Technological properties for grade   20KHN4FА   ( 20ХН4ФА )
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   20KHN4FА   ( 20ХН4ФА )
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           360
100   11.7 38     410
200   12.7 38     480
300   13.7 37     560
400     35     640
500     34     720
600   15.4 31      
700     29     1020
800     28     1120
900     27     1180
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     20KHN4FА   ( 20ХН4ФА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyFranceEngland
-DIN,WNrAFNORBS
3310
3415
1.5752
14NiCr14
12NC15
655M13

Types of delivery of grade   20KHN4FА   ( 20ХН4ФА )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling


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

  20KHN4FА   ( 20ХН4ФА ) - 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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