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Characteristics for grade     50G2   ( 50Г2 )

      Grade :     50G2   ( 50Г2 )
      Substitute:   45Г2, 60Г
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   50G2   ( 50Г2 )
C Si Mn Ni S P Cr Cu
0.46 - 0.550.17 - 0.371.4 - 1.8max   0.3max   0.035max   0.035max   0.3max   0.3


Temperature of critical points for grade   50G2   ( 50Г2 ).
Ac1 = 710 ,      Ac3(Acm) = 660 ,       Ar3(Arcm) = 680 ,       Ar1 = 600


Mechanical properties under Т=20oС for grade   50G2   ( 50Г2 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   740 420 11 35 Guenching and drawing
Forging to 100   570 315 17 38390Normalizing
Forging 100 - 300   570 315 14 35340Normalizing


    Brinell hardness for     50G2   ( 50Г2 )   (annealing) ,       GOST 4543-71 HB 10 -1 = 229   MPa


Technological properties for grade   50G2   ( 50Г2 )
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: predisposed


Physical properties for grade   50G2   ( 50Г2 )
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 2.04     7500    
100   11.3 41      
200   12.2 40      
300   12.3 38      
400     36      
500     35      
600   14.7        
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     50G2   ( 50Г2 )
Warning! Indicated both exact and nearest equivalents.
USAGermanySpainChinaBulgaria
-DIN,WNrUNEGBBDS
1552
G15520
50Mn7
F.120
50Mn2
50G2


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

  50G2   ( 50Г2 ) - 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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