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Characteristics for grade     50G   ( 50Г )

      Grade :     50G   ( 50Г )
      Substitute:   40Г, 50
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here



Chemical composition in % for grade   50G   ( 50Г )
C Si Mn Ni S P Cr Cu
0.48 - 0.560.17 - 0.370.7 - 1max   0.3max   0.035max   0.035max   0.3max   0.3


Temperature of critical points for grade   50G   ( 50Г ).
Ac1 = 723 ,      Ac3(Acm) = 760 ,       Ar3(Arcm) = 740 ,       Ar1 = 680 ,       Mn = 320


Mechanical properties under Т=20oС for grade   50G   ( 50Г )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 25   650 390 13 40390Guenching and drawing
Band annealed , GOST 2283-79     640-740  10-15   
Band cold-worked , GOST 2283-79     740-1180       


    Brinell hardness for     50G   ( 50Г )   (annealing) ,       GOST 4543-71 HB 10 -1 = 229   MPa
    Brinell hardness for     50G   ( 50Г )   (normalize) ,     Sheet trick GOST 1577-93 HB 10 -1 = 255   MPa
    Brinell hardness for     50G   ( 50Г )   (annealing) ,     Sheet trick GOST 1577-93 HB 10 -1 = 217   MPa


Technological properties for grade   50G   ( 50Г )
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   50G   ( 50Г )
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 2.16   43 7810    
100 2.13 11.8 42   487  
200 2.08 12.5 41   500  
300 1.99 13.2 38   517  
400 1.85 13.8 36   533  
500 1.74 14.3 34   559  
600 1.6 14.8 31   584  
700 1.42 15.1 29   609  
800 1.3 12.3 28   676  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     50G   ( 50Г )
Warning! Indicated both exact and nearest equivalents.
USAJapanEnglandBulgariaPoland
-JIS BSBDSPN
1050
1053
G10500
G10530
STH67
080M50
C50E
50G
50G

Types of delivery of grade   50G   ( 50Г )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
B33 - Sheets and Strips
B34 - Ribbons


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

  50G   ( 50Г ) - 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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