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Metals -> Structural steel -> Spring structural steel

Characteristics of the material 50KHG   ( 50HG,   50 ).

Material : 50KHG   ( 50HG,   50 )
Classification : Spring structural steel


Chemical composition in % of the material 50KHG   ( 50HG,   50 ) .
C Si Mn Ni S P Cr Cu
0.47 - 0.520.17 - 0.370.8 - 1max   0.25max   0.025max   0.0250.95 - 1.2max   0.2


Temperature of critical points of the grade 50KHG   ( 50HG,   50 ).
Ac1 = 750 ,      Ac3(Acm) = 775


Mechanical properties under =20o of the material 50KHG   ( 50HG,   50 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar to 80   1275 1177 7 35 Guenching 850oC, oil, Drawing 470oC,


    Brinell hardness of the material   50KHG   ( 50HG,   50 )   (annealing) ,       HB 10 -1= 269   MPa
    Brinell hardness of the material   50KHG   ( 50HG,   50 )   (without heat treatment) ,       HB 10 -1= 302   MPa


Technological properties of the material 50KHG   ( 50HG,   50 ) .
  Weldability: is not used.
 Flakes : not 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]

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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