Metals -> Structural steel -> Alloy structurall steel Characteristics of the material 35KH ( 35H, 35Х ).
Material : 35KH ( 35H, 35Х ) Substitute: 40Х, 35ХР Classification : Alloy structurall steel
Chemical composition in % of the material 35KH ( 35H, 35Х ) . C Si Mn Ni S P Cr Cu 0.31 - 0.39 0.17 - 0.37 0.5 - 0.8 max 0.3 max 0.035 max 0.035 0.8 - 1.1 max 0.3
Temperature of critical points of the grade 35KH ( 35H, 35Х ).
Ac1 = 743 , Ac3 (Acm ) = 782 , Ar3 (Arcm ) = 730 , Ar1 = 693 , Mn = 360
Mechanical properties under Т=20o С of the material 35KH ( 35H, 35Х ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Forging to 100 655 490 16 45 590 Guenching and drawing Forging 100 - 300 615 395 15 40 540 Guenching and drawing Bar Ж 25 910 735 11 45 690 Guenching 860o C, oil, Drawing 500o C, water,
Brinell hardness of the material 35KH ( 35H, 35Х ) (annealing) , HB 10 -1 = 197 MPa Brinell hardness of the material 35KH ( 35H, 35Х ) (cold-drawn, cold-worked) , HB 10 -1 = 207 MPa
Physical properties of the material 35KH ( 35H, 35Х ) . 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 2.14 100 11.3 47 200 12 43 300 2.07 12.9 40 400 13.7 36 500 1.76 14.2 600 14.6 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 35KH ( 35H, 35Х ) . Weldability: limited weldability. Flakes : weakly predisposed Temper brittleness: 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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