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Metals -> Tool steel -> Tool steel for roller

Characteristics of the material 90KHF   ( 90HF,   90 ).

Material : 90KHF   ( 90HF,   90 )
Substitute: 91, 92
Classification : Tool steel for roller


Chemical composition in % of the material 90KHF   ( 90HF,   90 ) .
C Si Mn Ni S P Cr V Cu
0.8 - 0.90.15 - 0.350.3 - 0.6max   0.35max   0.03max   0.030.4 - 0.70.15 - 0.3max   0.3


Temperature of critical points of the grade 90KHF   ( 90HF,   90 ).
Ac1 = 700 ,       Mn = 215


Mechanical properties under =20o of the material 90KHF   ( 90HF,   90 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Steel     990 670 19 55450Normalizing 870oC,Drawing 650oC,


    Brinell hardness of the material   90KHF   ( 90HF,   90 )   (annealing) ,       HB 10 -1= 241   MPa


Physical properties of the material 90KHF   ( 90HF,   90 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
20            
100     44   460  
200     42   500  
300     38   560  
400     36   620  
500     33   670  
600     31   730  
700     29   1320  
800     27   720  
900     27   640  
1000         650  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 90KHF   ( 90HF,   90 ) .
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: predisposed



Specification :
Mechanical properties :
s - 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/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

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

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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