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Characteristics for grade     12KH25N16G7АR   ( 12Х25Н16Г7АР )

      Grade :   12KH25N16G7АR   ( 12Х25Н16Г7АР ) (   Х25Н16Г7АР     ЭИ835   )
      Classification :   High alloy high-temperature steel
      Equivalent grades:     Is absent




Chemical composition in % for grade   12KH25N16G7АR   ( 12Х25Н16Г7АР )
Fe C Si Mn Ni S P Cr B
47.815 - 57max   0.12max   15 - 715 - 18max   0.02max   0.03523 - 26max   0.01


Mechanical properties under Т=20oС for grade   12KH25N16G7АR   ( 12Х25Н16Г7АР )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, GOST 5949-75 to Ø 60   690 325 40 45 Guenching 1050 - 1150oC,Cooling air,
Sheet trick, GOST 7350-77     740 390 50   Guenching 1050 - 1150oC,Cooling water,
Sheet thin, GOST 5582-75     980   35   Guenching 1050 - 1100oC,Cooling water,
Sheet thin, GOST 4986-79     690   15-30  Guenching 1050 - 1100oC, air,
Profile   longitudinal 700 330 40   Heating 1100 - 1150oC, air,


Technological properties for grade   12KH25N16G7АR   ( 12Х25Н16Г7АР )
  Weldability: without limitations.


Physical properties for grade   12KH25N16G7АR   ( 12Х25Н16Г7АР )
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 1.965   13.82 7820   1060
100 1.894 16.6 15.07     1100
200 1.815 16.2 16.33     1170
300 1.74 16.8 17.59     1200
400 1.66 17.4 19.26     1240
500 1.595 18 20.94     1280
600 1.495 18.3 22.19     1310
700 1.41 18.5 23.87     1330
800 1.335 18.7 25.54     1360
900 1.3 18.9 27.63     1390
T E 10- 5 a 10 6 l r C R 10 9


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

  12KH25N16G7АR   ( 12Х25Н16Г7АР ) - High alloy high-temperature 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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