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Characteristics for grade     40KH2N2MА   ( 40Х2Н2МА )



      Grade :   40KH2N2MА   ( 40Х2Н2МА ) (   40Х1НВА   )
      Substitute:   38Х2Н2МА
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   40KH2N2MА   ( 40Х2Н2МА )
C Si Mn Ni S P Cr Mo Cu
0.35 - 0.420.17 - 0.370.3 - 0.61.35 - 1.75max   0.025max   0.0251.25 - 1.650.2 - 0.3max   0.3


Temperature of critical points for grade   40KH2N2MА   ( 40Х2Н2МА ).
Ac1 = 740 ,      Ac3(Acm) = 805


Mechanical properties under Т=20oС for grade   40KH2N2MА   ( 40Х2Н2МА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   1080 930 10 45780Guenching and drawing


    Brinell hardness for     40KH2N2MА   ( 40Х2Н2МА )   (annealing) ,       GOST 4543-71 HB 10 -1 = 255   MPa


Technological properties for grade   40KH2N2MА   ( 40Х2Н2МА )
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: not predisposed


Equivalent steels for grade     40KH2N2MА   ( 40Х2Н2МА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanEnglandSpainChinaAustraliaSouth Korea
-DIN,WNrJIS BSUNEGBASKS
4340
G43400
G98500
H43400
1.6565
40NiCrMo6
SNB24-1-5
SNCM439
STPT38
817A37
818M40
40NiCrMo7
F.1272
40CrNiMoA
ML40CrNiMoA
4340
4340H
SNCM439



Types of delivery of grade   40KH2N2MА   ( 40Х2Н2МА )
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

  40KH2N2MА   ( 40Х2Н2МА ) - 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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