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Characteristics of the material 15KHF   ( 15HF,   15 ).

Material : 15KHF   ( 15HF,   15 )
Substitute: 20
Classification : Alloy structurall steel


Chemical composition in % of the material 15KHF   ( 15HF,   15 ) .
C Si Mn Ni S P Cr V Cu
0.12 - 0.180.17 - 0.370.4 - 0.7max   0.3max   0.035max   0.0350.8 - 1.10.06 - 0.12max   0.3


Temperature of critical points of the grade 15KHF   ( 15HF,   15 ).
Ac1 = 741 ,      Ac3(Acm) = 843 ,       Ar3(Arcm) = 788 ,       Ar1 = 704 ,       Mn = 435


Mechanical properties under =20o of the material 15KHF   ( 15HF,   15 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 15   730 540 13 50780As-delivered state


    Brinell hardness of the material   15KHF   ( 15HF,   15 )   (annealing) ,       HB 10 -1= 187   MPa
    Brinell hardness of the material   15KHF   ( 15HF,   15 )   (cold-drawn, cold-worked) ,       HB 10 -1= 207   MPa


Physical properties of the material 15KHF   ( 15HF,   15 ) .
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 2.06     7760    
100   11.9 43 7730   281
200   12.4 42 7710   345
300   13.1 42 7670   421
400   13.7 40 7640   513
500   14.2 36 7600   606
600   14.5 34 7570   731
700   14.9 30 7530   833
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 15KHF   ( 15HF,   15 ) .
  Weldability: without limitations.
 Flakes : weakly predisposed
Temper brittleness: weakly 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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