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Metals -> Structural steel -> Alloy structurall steel

Characteristics of the material 45G2   ( 45G2,   452 ).

Material : 45G2   ( 45G2,   452 )
Substitute: 502
Classification : Alloy structurall steel


Chemical composition in % of the material 45G2   ( 45G2,   452 ) .
C Si Mn Ni S P Cr Cu
0.41 - 0.490.17 - 0.371.4 - 1.8max   0.3max   0.035max   0.035max   0.3max   0.3


Temperature of critical points of the grade 45G2   ( 45G2,   452 ).
Ac1 = 711 ,      Ac3(Acm) = 765 ,       Ar3(Arcm) = 704 ,       Ar1 = 626 ,       Mn = 245


Mechanical properties under =20o of the material 45G2   ( 45G2,   452 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 25   680 400 11 40 Guenching 850oC, oil, Drawing 650oC, air,


    Brinell hardness of the material   45G2   ( 45G2,   452 )   (annealing) ,       HB 10 -1= 229   MPa


Physical properties of the material 45G2   ( 45G2,   452 ) .
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 2.04     7810    
100   11.3        
200   11.9 45   445  
300   12.7 43   428  
400     41      
500   14.7 35      
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 45G2   ( 45G2,   452 ) .
  Weldability: hard weldability.
 Flakes : weakly 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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