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Characteristics for grade     18KHGT   ( 18ХГТ )

      Grade :     18KHGT   ( 18ХГТ )
      Substitute:   30ХГТ, 25ХГТ, 12ХН3А, 12Х2Н4А, 20ХН2М, 14ХГСН2МА, 20ХГР
      Classification :   Alloy structurall steel
      Equivalent grades:   Go here
Grade   18KHGT   ( 18ХГТ ):   supplier   Auremo   www.auremo.biz
Sale:   Russia +7 (812) 680-16-77 ,   Germany +49 (208) 205-83-073,     info [a] auremo.org



Chemical composition in % for grade   18KHGT   ( 18ХГТ )
C Si Mn Ni S P Cr Ti Cu
0.17 - 0.230.17 - 0.370.8 - 1.1max   0.3max   0.035max   0.0351 - 1.30.03 - 0.09max   0.3


Temperature of critical points for grade   18KHGT   ( 18ХГТ ).
Ac1 = 740 ,      Ac3(Acm) = 825 ,       Ar3(Arcm) = 730 ,       Ar1 = 650 ,       Mn = 360


Mechanical properties under Т=20oС for grade   18KHGT   ( 18ХГТ )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71     980 885 9 50780Guenching and drawing
Steel 5   1520 1320 12 50720Guenching 850oC, oil, Drawing 200oC, air,
Steel 20   980 730 15 551130Guenching 850oC, oil, Drawing 200oC, air,


    Brinell hardness for     18KHGT   ( 18ХГТ )   (annealing) ,       GOST 4543-71 HB 10 -1 = 217   MPa
    Brinell hardness for     18KHGT   ( 18ХГТ )   (cold-worked) ,       GOST 4543-71 HB 10 -1 = 229   MPa


Technological properties for grade   18KHGT   ( 18ХГТ )
  Weldability: without limitations.
 Flakes : not predisposed
Temper brittleness: weakly predisposed


Physical properties for grade   18KHGT   ( 18ХГТ )
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m
20 2.11   37 7800    
100 2.05 10 38   495  
200 1.97 11.5 38   508  
300 1.91 12.3 37   525  
400 1.76 12.8 35   537  
500 1.68 13.3 34   567  
600 1.55 13.6 31   588  
700 1.36   30   626  
800 1.29   29   705  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     18KHGT   ( 18ХГТ )
Warning! Indicated both exact and nearest equivalents.
GermanyFranceChinaBulgariaPolandRomaniaCzechia
DIN,WNrAFNORGBBDSPNSTASCSN
20MnCr5G
20MC5
20CrMnTi
18ChGT
18HGT
20TiMnCr12
21TiMnCr12q
14223

Types of delivery of grade   18KHGT   ( 18ХГТ )
B03 - Metal forming treatment. Forgings
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling


Specification :
Mechanical properties :
sв - 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/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

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

  18KHGT   ( 18ХГТ ) - Alloy structurall steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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