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Characteristics of the material 30KHGS   ( 30HGS,   30 ).

Material : 30KHGS   ( 30HGS,   30 )
Substitute: 40, 35, 40, 25, 35
Classification : Alloy structurall steel


Chemical composition in % of the material 30KHGS   ( 30HGS,   30 ) .
C Si Mn Ni S P Cr Cu
0.28 - 0.340.9 - 1.20.8 - 1.1max   0.3max   0.025max   0.0250.8 - 1.1max   0.3


Temperature of critical points of the grade 30KHGS   ( 30HGS,   30 ).
Ac1 = 760 ,      Ac3(Acm) = 830 ,       Ar3(Arcm) = 705 ,       Ar1 = 670 ,       Mn = 352


Mechanical properties under =20o of the material 30KHGS   ( 30HGS,   30 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 25   1080 830 10 45490Guenching 880oC, oil, Drawing 540oC, water,
Sheet annealed     500-750  14    


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


Physical properties of the material 30KHGS   ( 30HGS,   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 2.15   38 7850   210
100 2.11 11.7 38 7830 496  
200 2.03 12.3 37 7800 504  
300 1.96 12.9 37 7760 512  
400 1.84 13.4 36 7730 533  
500 1.73 13.7 34 7700 554  
600 1.64 14 33 7670 584  
700 1.43 14.3 31   622  
800 1.25 12.9 30   693  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 30KHGS   ( 30HGS,   30 ) .
  Weldability: limited weldability.
 Flakes : 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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