Metals -> Structural steel -> Alloy structurall steel Characteristics of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ).
Material : 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) Classification : Alloy structurall steel
Chemical composition in % of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) . C Si Mn Ni S P Cr Mo V Cu 0.42 - 0.5 0.17 - 0.37 0.5 - 0.8 1.3 - 1.8 max 0.025 max 0.025 0.8 - 1.1 0.2 - 0.3 0.1 - 0.18 max 0.3
Temperature of critical points of the grade 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ).
Ac1 = 735 , Ac3 (Acm ) = 825 , Ar3 (Arcm ) = 470 , Ar1 = 370 , Mn = 275
Mechanical properties under Ò=20o Ñ of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar 1420 1275 7 35 390 Guenching 860o C, oil,
Brinell hardness of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) (annealing) , HB 10 -1 = 269 MPa
Physical properties of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) . 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 2.16 34 300 100 2.07 11 34 480 363 200 1.97 11.6 33 500 460 300 1.88 12.1 32 520 557 400 1.76 12.7 31 540 677 500 1.68 13.3 30 555 822 600 1.52 13.7 29 993 700 1.36 13.9 27 1160 800 1.28 11.9 26 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 45KHN2MFÀ ( 45HN2MFÀ, 45ÕÍ2ÌÔÀ ) . Weldability: hard weldability. Flakes : predisposed Temper brittleness: not predisposed
Specification :
Mechanical properties : s â - 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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