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Characteristics for grade     25Kh1MF   ( 25Х1МФ )

      Grade :   25Kh1MF   ( 25Х1МФ ) (   ЭИ10   )
      Classification :   Relaxation-resistant steel
      Equivalent grades:   Go here



Chemical composition in % for grade   25Kh1MF   ( 25Х1МФ )
C Si Mn Ni S P Cr Mo V Cu
0.22 - 0.290.17 - 0.370.4 - 0.7max   0.3max   0.025max   0.031.5 - 1.80.25 - 0.350.15 - 0.3max   0.2


Temperature of critical points for grade   25Kh1MF   ( 25Х1МФ ).
Ac1 = 760 ,      Ac3(Acm) = 840 ,       Ar3(Arcm) = 760 - 780 ,       Ar1 = 680 - 690


Mechanical properties under Т=20oС for grade   25Kh1MF   ( 25Х1МФ )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar, band, GOST 20072-74 max thickness 25 longitudinal 880 735 14 50590Guenching 880 - 900oC, oil, Drawing 640 - 660oC,Cooling air,
Bar, band, GOST 20072-74   longitudinal 780 665 16 50590Guenching 930 - 950oC, oil, Drawing 620 - 660oC,


    Brinell hardness for     25Kh1MF   ( 25Х1МФ )   (quenching, tempering) ,       HB 10 -1 = 241 - 321   MPa
    Brinell hardness for     25Kh1MF   ( 25Х1МФ )   (hot-rolled, annealing) ,       GOST 20072-74 HB 10 -1 = 229   MPa


Technological properties for grade   25Kh1MF   ( 25Х1МФ )
  Weldability: hard weldability.
 Flakes : predisposed
Temper brittleness: not predisposed


Physical properties for grade   25Kh1MF   ( 25Х1МФ )
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 2.17     7840    
100 2.11 11.3 39.8   462 312
200 2.06 11.7 37.9 7790   396
300 1.98 12.8 36.9     475
400 1.91 13.9 35.9 7720   574
500 1.8 14.2 34.8     680
600 1.67 14.4   7650   826
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     25Kh1MF   ( 25Х1МФ )
Warning! Indicated both exact and nearest equivalents.
USAGermanyFranceEnglandEuropeanChinaCzechia
-DIN,WNrAFNORBSEN GBCSN
A193B14
1.7733
21CrMoV5-7
24CrMoV55
21CrMoV5-7
21CrMoV5-7
1.7709
21CrMoV5-7
25CrMoVA
15236


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

  25Kh1MF   ( 25Х1МФ ) - Relaxation-resistant 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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