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Characteristics for grade     38Kh2MYuА   ( 38Х2МЮА )

      Grade :   38Kh2MYuА   ( 38Х2МЮА ) (   38ХМЮА   )
      Substitute:   38Х2ЮА, 38ХВФЮ, 20Х3МВФ. 38Х2Ю
      Classification :   Relaxation-resistant steel
      Equivalent grades:   Go here



Chemical composition in % for grade   38Kh2MYuА   ( 38Х2МЮА )
C Si Mn Ni S P Cr MoAl Cu
0.35 - 0.420.2 - 0.450.3 - 0.6max   0.3max   0.025max   0.0251.35 - 1.650.15 - 0.250.7 - 1.1max   0.3


Temperature of critical points for grade   38Kh2MYuА   ( 38Х2МЮА ).
Ac1 = 800 ,      Ac3(Acm) = 940 ,       Ar1 = 730


Mechanical properties under Т=20oС for grade   38Kh2MYuА   ( 38Х2МЮА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe, GOST 21729-76     392   20    
Bar, GOST 4543-71 Ø 30   980 835 14 50880Guenching and drawing


    Brinell hardness for     38Kh2MYuА   ( 38Х2МЮА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 229   MPa
    Brinell hardness for     38Kh2MYuА   ( 38Х2МЮА )   (cold-worked) ,       GOST 4543-71 HB 10 -1 = 255   MPa


Technological properties for grade   38Kh2MYuА   ( 38Х2МЮА )
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: not predisposed


Physical properties for grade   38Kh2MYuА   ( 38Х2МЮА )
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 2.09   33 7710    
100 2.02 11.5 33   496  
200 1.94 11.8 32   517  
300 1.9 12.7 31   533  
400 1.81 13.4 20   546  
500 1.74 13.9 20   575  
600 1.62 14.7 28   609  
700 1.47 14.9 27   638  
800 1.37   27   676  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     38Kh2MYuА   ( 38Х2МЮА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalySpainChinaSwedenPolandCzechiaSouth Korea
-DIN,WNrJIS AFNORBSEN UNIUNEGBSSPNCSNKS
A290C1M
Cl.A
J24056
K24065
K24728
1.8509
41CrAlMo7
SACM645
40CAD6-12
905M39
41CrAlMo7
41CrAiMo7
F.174
38CrMoAl
2940
38HMJ
15340
SACM645


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

  38Kh2MYuА   ( 38Х2МЮА ) - Relaxation-resistant 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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