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Characteristics for grade     20KHGR   ( 20ХГР )

      Grade :     20KHGR   ( 20ХГР )
      Substitute:   20ХН3А, 20ХН2М, 12ХН3А, 12ХН2
      Classification :   Alloy structurall steel
      Equivalent grades:     Is absent
Grade   20KHGR   ( 20ХГР ):   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   20KHGR   ( 20ХГР )
C Si Mn Ni S P Cr Ti Cu B
0.18 - 0.240.17 - 0.370.7 - 1max   0.3max   0.035max   0.0350.75 - 1.05max   0.06max   0.30.001 - 0.005


Temperature of critical points for grade   20KHGR   ( 20ХГР ).
Ac1 = 735 ,      Ac3(Acm) = 835 ,       Ar3(Arcm) = 760 ,       Ar1 = 670


Mechanical properties under Т=20oС for grade   20KHGR   ( 20ХГР )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 4543-71 Ø 15   980 780 9 50780Guenching 880oC, oil, Drawing 200oC, air,


    Brinell hardness for     20KHGR   ( 20ХГР )   (annealing) ,       GOST 4543-71 HB 10 -1 = 197   MPa


Technological properties for grade   20KHGR   ( 20ХГР )
 Flakes : predisposed
Temper brittleness: predisposed


Physical properties for grade   20KHGR   ( 20ХГР )
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 2.07     7800    
100   11.7        

Types of delivery of grade   20KHGR   ( 20ХГР )
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

  20KHGR   ( 20ХГР ) - 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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