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

Characteristics of the material 50   ( 50,   50 ).

Material : 50   ( 50,   50 )
Substitute: 45, 50, 502, 55
Classification : High quality structural carbon steel


Chemical composition in % of the material 50   ( 50,   50 ) .
C Si Mn Ni S P Cr Cu As
0.47 - 0.550.17 - 0.370.5 - 0.8max   0.25max   0.04max   0.035max   0.25max   0.25max   0.08


Temperature of critical points of the grade 50   ( 50,   50 ).
Ac1 = 725 ,      Ac3(Acm) = 760 ,       Ar3(Arcm) = 750 ,       Ar1 = 690 ,       Mn = 300


Mechanical properties under =20o of the material 50   ( 50,   50 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Forging to 100 longitudinal 570 315 17 38390Normalizing
Forging 100 - 300 longitudinal 530 275 17 38340Normalizing


    Brinell hardness of the material   50   ( 50,   50 )   (normalize) ,       HB 10 -1= 207   MPa


Physical properties of the material 50   ( 50,   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   48 7810   272
100 2.13 11.2 48   487  
200 2.07 12 47   500  
300 2 12.8 44   517  
400 1.8 13.4 41   533  
500 1.71 13.9 38   559  
600 1.54 14.2 35   584  
700 1.36 14.5 31      
800 1.23 13.4 27      
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 50   ( 50,   50 ) .
  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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