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Characteristics for grade     38KHА   ( 38ХА )

      Grade :     38KHА   ( 38ХА )
      Substitute:   40Х, 35Х, 40ХН
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here
Grade   38KHА   ( 38ХА ):   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   38KHА   ( 38ХА )
C Si Mn Ni S P Cr Cu
0.35 - 0.420.17 - 0.370.5 - 0.8max   0.3max   0.025max   0.0250.8 - 1.1max   0.3


Temperature of critical points for grade   38KHА   ( 38ХА ).
Ac1 = 740 ,      Ac3(Acm) = 780 ,       Ar3(Arcm) = 730 ,       Ar1 = 693 ,       Mn = 250


Mechanical properties under Т=20oС for grade   38KHА   ( 38ХА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe, GOST 21729-76     588   14    
Bar, GOST 4543-71 Ø 25   930 780 12 50880Guenching 860oC, oil, Drawing 550oC, water,
Bar cold-drawn , GOST 10702-78     590     60 Annealing


    Brinell hardness for     38KHА   ( 38ХА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 207   MPa
    Brinell hardness for     38KHА   ( 38ХА )   ,     Bar GOST 10702-78 HB 10 -1 = 187   MPa


Technological properties for grade   38KHА   ( 38ХА )
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   38KHА   ( 38ХА )
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 1.96     7850   290
100   12.7 50      
200   13.1 46 7800    
300   13.5 42      
400   13.8 40      
500   14.2 37      
600   14.6 35 7650    
700     31      
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     38KHА   ( 38ХА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyChinaSwedenBulgariaPolandRomaniaCzechiaAustria
-DIN,WNrJIS AFNORBSEN UNIGBSSBDSPNSTASCSNONORM
5140H
G51350
Gr.5135
1.7034
37Cr4
37CrS4
41Cr4
SCr3
SCr35H
SCr4
SCr435
SCr440
37Cr4
38C4
38C4FF
41Cr4
530A36
530M40
1.7034
37Cr4
38Cr4
41Cr4
35Cr
2245
38ChA
38HA
40H
40Cr10X
14140
41Cr4SP

Types of delivery of grade   38KHА   ( 38ХА )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
B33 - Sheets and Strips
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

  38KHА   ( 38ХА ) - 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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