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Characteristics for grade     75KHM   ( 75ХМ )



      Grade :     75KHM   ( 75ХМ )
      Substitute:   9Х2
      Classification :   Tool steel for roller
      Equivalent grades:     Is absent



Chemical composition in % for grade   75KHM   ( 75ХМ )
C Si Mn Ni S P Cr Mo
0.7 - 0.80.2 - 0.60.2 - 0.7max   0.5max   0.03max   0.031.4 - 1.70.2 - 0.3


Mechanical properties under Т=20oС for grade   75KHM   ( 75ХМ )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Steel 500 longitudinal 750 430 19 41240Double normalizing and drawing


Technological properties for grade   75KHM   ( 75ХМ )
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: not predisposed


Physical properties for grade   75KHM   ( 75ХМ )
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       7900    
100     45   490  
200     41   500  
300     40   530  
400     39   570  
500     38   640  
600     37   750  
700     35   900  
800         700  
900         760  
1000         810  
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

  75KHM   ( 75ХМ ) - Tool steel for roller: 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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