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Grade : | 20KH8VL ( 20Х8ВЛ ) |
Classification : | Casting alloy steel with specific properties |
Equivalent grades: | Is absent |
C | Si | Mn | S | P | Cr | W |
0.15 - 0.25 | 0.3 - 0.6 | 0.3 - 0.5 | max 0.035 | max 0.04 | 7.5 - 9 | 1.25 - 1.75 |
Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
- | mm | - | MPa | MPa | % | % | kJ / m2 | - |
Casting, GOST 977-88 | 589 | 392 | 16 | 30 | 392 | Annealing 950oC,Normalizing 950oC,Cooling air, Drawing 680 - 720oC, air, |
Annealing 940 - 960 ° C, Normalizing 940 - 960 ° C, Air cooling; Tempering 680 - 720 ° C , Air cooling |
B82 - Steel Castings |
Mechanical properties : | |
sв | - Tensile strength , [MPa] |
sT | - Yield stress, [MPa] |
d5 | - 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] |
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