Metals -> Casting steel -> Casting steel for general purposes Characteristics of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ).
Material : 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) Classification : Casting steel for general purposes
Chemical composition in % of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) . C Si Mn Ni S P Cr Mo Ti Cu 0.18 - 0.24 0.9 - 1.2 0.9 - 1.3 1.1 - 1.5 max 0.045 max 0.05 0.6 - 0.9 0.1 - 0.15 0.03 - 0.07 0.4 - 0.6
Mechanical properties under Ò=20o Ñ of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) .
Assortment
Dimension
Direct.
s â
s T
d 5
y
KCU
Heat treatment - mm - MPa MPa % % kJ / m2 - Casting to 100 650 500 12 20 400 Guenching 910 - 930o C,Drawing 640 - 660o C,
Brinell hardness of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) , HB 10 -1 = 207 - 269 MPa
Physical properties of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) . 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 2.09 25 7830 433 100 2.01 11 27 491 467 200 1.93 11.8 28 500 531 300 1.84 12.5 30 521 605 400 1.76 12.9 32 533 705 500 1.69 13.3 33 554 835 600 1.53 13.5 33 584 967 700 1.33 13.6 31 622 1127 800 1.28 11 28 689 1175 900 12.1 28 685 1205 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) . Weldability: limited weldability.
Technological properties of the material 20KHGSNDML ( 20HGSNDML, 20ÕÃÑÍÄÌË ) . Linear shrinkage, % : 1.9
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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