Metals -> Casting steel -> Casting steel for general purposes Characteristics of the material 40KHL ( 40HL, 40ÕË ).
Material : 40KHL ( 40HL, 40ÕË ) Substitute: 30ÃÑË, 35ÃÑË Classification : Casting steel for general purposes
Chemical composition in % of the material 40KHL ( 40HL, 40ÕË ) . C Si Mn Ni S P Cr Cu 0.35 - 0.45 0.2 - 0.4 0.4 - 0.9 max 0.3 max 0.04 max 0.04 0.8 - 1.1 max 0.3
Temperature of critical points of the grade 40KHL ( 40HL, 40ÕË ).
Ac1 = 743 , Ac3 (Acm ) = 782 , Ar3 (Arcm ) = 730 , Ar1 = 693
Mechanical properties under Ò=20o Ñ of the material 40KHL ( 40HL, 40ÕË ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Casting to 100 650 500 12 25 400 Normalizing 850 - 860o C,Drawing 600 - 650o C,
Brinell hardness of the material 40KHL ( 40HL, 40ÕË ) , HB 10 -1 = 196 - 229 MPa
Physical properties of the material 40KHL ( 40HL, 40ÕË ) . 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 2.19 48 7830 233 100 2.16 12.2 46 491 270 200 2.1 12.7 45 508 335 300 2.04 13.1 42 525 435 400 1.85 13.4 39 538 540 500 1.76 13.8 35 567 665 600 1.64 13.2 32 588 815 700 1.43 14.6 28 626 975 800 1.32 11.8 27 701 1115 900 12.6 27 689 1195 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 40KHL ( 40HL, 40ÕË ) . Weldability: limited weldability. Flakes : weakly predisposed Temper brittleness: predisposed
Technological properties of the material 40KHL ( 40HL, 40ÕË ) . Linear shrinkage, % : 2.2 - 2.3
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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