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Metals -> Structural steel -> Alloy structurall steel

Characteristics of the material 40G2   ( 40G2,   40Г2 ).

Material : 40G2   ( 40G2,   40Г2 )
Substitute: 45Г2, 60Г
Classification : Alloy structurall steel


Chemical composition in % of the material 40G2   ( 40G2,   40Г2 ) .
C Si Mn Ni S P Cr Cu
0.36 - 0.440.17 - 0.371.4 - 1.8max   0.3max   0.035max   0.035max   0.3max   0.3


Temperature of critical points of the grade 40G2   ( 40G2,   40Г2 ).
Ac1 = 713 ,      Ac3(Acm) = 780 ,       Ar3(Arcm) = 710 ,       Ar1 = 627 ,       Mn = 340


Mechanical properties under Т=20oС of the material 40G2   ( 40G2,   40Г2 ) .
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar Ж 50 Ц 770 590 18 57680Guenching 820oC, water, Drawing 600oC, water,
Bar Ж 75 Ц 730 540 18 54590Guenching 820oC, water, Drawing 600oC, water,
Bar Ж 100 Ц 720 490 18 56290Guenching 820oC, water, Drawing 600oC, water,


    Brinell hardness of the material   40G2   ( 40G2,   40Г2 )   (annealing) ,       HB 10 -1= 217   MPa


Physical properties of the material 40G2   ( 40G2,   40Г2 ) .
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 2.12     7800    


Technological properties of the material 40G2   ( 40G2,   40Г2 ) .
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: predisposed



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

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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