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Characteristics for grade     38KHMА   ( 38ХМА )

      Grade :     38KHMА   ( 38ХМА )
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   38KHMА   ( 38ХМА )
C Si Mn Ni S P Cr Mo Cu
0.35 - 0.420.17 - 0.370.35 - 0.65max   0.3max   0.025max   0.0250.9 - 1.30.2 - 0.3max   0.3


Temperature of critical points for grade   38KHMА   ( 38ХМА ).
Ac1 = 758 ,      Ac3(Acm) = 805 ,       Ar3(Arcm) = 725 ,       Ar1 = 650


Mechanical properties under Т=20oС for grade   38KHMА   ( 38ХМА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar Ø 25   980 885 11 45690Guenching 850oC, oil, Drawing 600oC, air,


Physical properties for grade   38KHMА   ( 38ХМА )
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 2.11   33     257
100 2.01 12.4 35   496 280
200 1.94 13.1 38   508 310
300 1.84 13.7 39   525 380
400 1.74 14.2 36   538 470
500 1.69 14.5 34   567 580
600 1.66 14.6 33   600 720
700 1.41 14.7 31   672 870
800 1.29 11.2 27   697 1060
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     38KHMА   ( 38ХМА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyFranceEnglandSpain
-DIN,WNrAFNORBSUNE
4140
4142
1.7223
41CrMo4
42CD4TS
708M40
42CrMo4


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]

  38KHMА   ( 38ХМА ) - 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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