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Characteristics for grade     38KHN3MА   ( 38ХН3МА )

      Grade :     38KHN3MА   ( 38ХН3МА )
      Substitute:   38ХН3ВА
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   38KHN3MА   ( 38ХН3МА )
C Si Mn Ni S P Cr Mo Cu
0.33 - 0.40.17 - 0.370.25 - 0.52.75 - 3.25max   0.025max   0.0250.8 - 1.20.2 - 0.3max   0.3


Temperature of critical points for grade   38KHN3MА   ( 38ХН3МА ).
Ac1 = 730 ,      Ac3(Acm) = 770 ,       Ar3(Arcm) = 315 ,       Ar1 = 300


Mechanical properties under Т=20oС for grade   38KHN3MА   ( 38ХН3МА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   1080 980 12 50780Guenching and drawing


    Brinell hardness for     38KHN3MА   ( 38ХН3МА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 269   MPa


Technological properties for grade   38KHN3MА   ( 38ХН3МА )
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: not predisposed


Physical properties for grade   38KHN3MА   ( 38ХН3МА )
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 2.07   36     292
100 2.03 11.8 36   496 317
200 1.96 12.3 36   508 358
300 1.92 12.7 35   525 425
400 1.82 13.1 34   538 506
500 1.73 13.4 33   567 602
600 1.67 13.7 31   601 742
700 1.47 13.9 30   672 890
800 1.35 10.8 29   697 1100
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     38KHN3MА   ( 38ХН3МА )
Warning! Indicated both exact and nearest equivalents.
Japan
JIS
SNC28

Types of delivery of grade   38KHN3MА   ( 38ХН3МА )
B03 - Metal forming treatment. Forgings
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

  38KHN3MА   ( 38ХН3МА ) - 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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