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Metals -> Structural steel -> High quality structural carbon steel

Characteristics of the material 45   ( 45,   45 ).

Material : 45   ( 45,   45 )
Substitute: 40, 50, 502
Classification : High quality structural carbon steel


Chemical composition in % of the material 45   ( 45,   45 ) .
C Si Mn Ni S P Cr Cu As
0.42 - 0.50.17 - 0.370.5 - 0.8max   0.25max   0.04max   0.035max   0.25max   0.25max   0.08


Temperature of critical points of the grade 45   ( 45,   45 ).
Ac1 = 730 ,      Ac3(Acm) = 755 ,       Ar3(Arcm) = 690 ,       Ar1 = 780 ,       Mn = 350


Mechanical properties under =20o of the material 45   ( 45,   45 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Sheet hotrolled 80   590   18   As-delivered state
Strip hotrolled 6 - 25   600   16 40 As-delivered state
Forging 100 - 300   470 245 19 42390Normalizing
Forging 300 - 500   470 245 17 35340Normalizing
Forging 500 - 800   470 245 15 30340Normalizing


    Brinell hardness of the material   45   ( 45,   45 )   (hot-rolled, annealing) ,       HB 10 -1= 170   MPa
    Brinell hardness of the material   45   ( 45,   45 )   (cold-drawn, cold-worked) ,       HB 10 -1= 207   MPa


Physical properties of the material 45   ( 45,   45 ) .
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     7826    
100 2.01 11.9 48 7799 473  
200 1.93 12.7 47 7769 494  
300 1.9 13.4 44 7735 515  
400 1.72 14.1 41 7698 536  
500   14.6 39 7662 583  
600   14.9 36 7625 578  
700   15.2 31 7587 611  
800     27 7595 720  
900     26   708  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 45   ( 45,   45 ) .
  Weldability: hard weldability.
 Flakes : weakly predisposed
Temper brittleness: not 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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