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Metals -> Structural steel -> Alloy structurall steel

Characteristics of the material 50G   ( 50G,   50 ).

Material : 50G   ( 50G,   50 )
Substitute: 40, 50
Classification : Alloy structurall steel


Chemical composition in % of the material 50G   ( 50G,   50 ) .
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 of the grade 50G   ( 50G,   50 ).
Ac1 = 723 ,      Ac3(Acm) = 760 ,       Ar3(Arcm) = 740 ,       Ar1 = 680 ,       Mn = 320


Mechanical properties under =20o of the material 50G   ( 50G,   50 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 30 800 550 18 55780Guenching 840oC, water, Drawing 560 - 580oC, air,
Bar 50 760 490 18 55680Guenching 840oC, water, Drawing 560 - 580oC, air,
Bar 80 740 470 18 50590Guenching 840oC, water, Drawing 560 - 580oC, air,
Band annealed to 1.5   650   15    


    Brinell hardness of the material   50G   ( 50G,   50 )   (annealing) ,       HB 10 -1= 229   MPa


Physical properties of the material 50G   ( 50G,   50 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
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


Technological properties of the material 50G   ( 50G,   50 ) .
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: predisposed



Specification :
Mechanical properties :
s - 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/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

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

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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