Metals -> Structural steel -> Alloy structurall steel Characteristics of the material 15KHF ( 15HF, 15ХФ ).
Material : 15KHF ( 15HF, 15ХФ ) Substitute: 20ХФ Classification : Alloy structurall steel
Chemical composition in % of the material 15KHF ( 15HF, 15ХФ ) . C Si Mn Ni S P Cr V Cu 0.12 - 0.18 0.17 - 0.37 0.4 - 0.7 max 0.3 max 0.035 max 0.035 0.8 - 1.1 0.06 - 0.12 max 0.3
Temperature of critical points of the grade 15KHF ( 15HF, 15ХФ ).
Ac1 = 741 , Ac3 (Acm ) = 843 , Ar3 (Arcm ) = 788 , Ar1 = 704 , Mn = 435
Mechanical properties under Т=20o С of the material 15KHF ( 15HF, 15ХФ ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar Ж 15 730 540 13 50 780 As-delivered state
Brinell hardness of the material 15KHF ( 15HF, 15ХФ ) (annealing) , HB 10 -1 = 187 MPa Brinell hardness of the material 15KHF ( 15HF, 15ХФ ) (cold-drawn, cold-worked) , HB 10 -1 = 207 MPa
Physical properties of the material 15KHF ( 15HF, 15ХФ ) . 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 2.06 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, 15ХФ ) . Weldability: without limitations. Flakes : weakly predisposed Temper brittleness: weakly predisposed
Specification :
Mechanical properties : s в - Tensile strength , [MPa] s T - Yield stress, [MPa] d 5 - 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
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