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Characteristics of the material 30KHGT   ( 30HGT,   30 ).

Material : 30KHGT   ( 30HGT,   30 )
Substitute: 18, 202, 25, 1224
Classification : Alloy structurall steel


Chemical composition in % of the material 30KHGT   ( 30HGT,   30 ) .
C Si Mn Ni S P Cr Ti
0.24 - 0.320.17 - 0.370.8 - 1.1max   0.3max   0.035max   0.0351 - 1.30.03 - 0.09


Temperature of critical points of the grade 30KHGT   ( 30HGT,   30 ).
Ac1 = 770 ,      Ac3(Acm) = 825 ,       Ar3(Arcm) = 740 ,       Ar1 = 665


Mechanical properties under =20o of the material 30KHGT   ( 30HGT,   30 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Forging to 100   835 685 13 42590Guenching and drawing


    Brinell hardness of the material   30KHGT   ( 30HGT,   30 )   (annealing) ,       HB 10 -1= 229   MPa


Physical properties of the material 30KHGT   ( 30HGT,   30 ) .
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 2.12   36      
100 2.02 10.5 37   495  
200 1.95 12 36   508  
300 1.89 12.7 34   525  
400 1.74 13.3 33   537  
500 1.69 13.8 31   567  
600 1.57 14 29   588  
700 1.38   28   626  
800 1.32   28   705  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 30KHGT   ( 30HGT,   30 ) .
  Weldability: limited weldability.
 Flakes : not 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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