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Grade : | 20KH5ML ( 20Х5МЛ ) |
Classification : | Casting alloy steel with specific properties |
Equivalent grades: | Go here |
C | Si | Mn | S | P | Cr | Mo |
0.15 - 0.25 | 0.35 - 0.7 | 0.4 - 0.6 | max 0.04 | max 0.04 | 4 - 6.5 | 0.4 - 0.65 |
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,Drawing 680 - 720oC, air, Cooling air, |
Weldability: | limited weldability. |
Annealing 940 - 960 ° C, Normalizing 940 - 960 ° C, air cooling; Tempering 680 - 720 ° C , air cooling |
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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] |
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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