| Grade : | 20KHGSFL ( 20ХГСФЛ ) |
| Classification : | Casting alloy steel for general purposes |
| Equivalent grades: | Is absent |
Chemical composition in % for grade 20KHGSFL ( 20ХГСФЛ )
| C | Si | Mn | Ni | S | P | Cr | V | Cu |
| 0.14 - 0.22 | 0.5 - 0.7 | 0.9 - 1.3 | max 0.4 | max 0.02 | max 0.02 | 0.3 - 0.6 | 0.07 - 0.13 | max 0.3 |
Temperature of critical points for grade 20KHGSFL ( 20ХГСФЛ ).
| Ac1 = 740 - 750 , Ac3(Acm) = 850 - 920 , Ar3(Arcm) = 750 - 770 , Ar1 = 500 - 600 , Mn = 365 - 380 |
Mechanical properties under Т=20oС for grade 20KHGSFL ( 20ХГСФЛ )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Casting, GOST 21357-87 | to 100 | 500 | 320 | 18 | 30 | 500 | Normalizing 900 - 920oC,Drawing 630 - 650oC, | |
| Casting, GOST 21357-87 | 600 | 450 | 14 | 25 |
Technological properties for grade 20KHGSFL ( 20ХГСФЛ )
| Temper brittleness: | predisposed |
Technological properties of the material 20KHGSFL ( 20ХГСФЛ ) .
| Linear shrinkage : | 1.5 - 2.5 % |
Heat treatment of the material 20KHGSFL ( 20ХГСФЛ )
| Normalizing 900 - 920 ° C, Tempering 630 - 650 ° C |
| Water hardening 900 - 920 ° C, Tempering 650 - 670 ° C |
Types of delivery of grade 20KHGSFL ( 20ХГСФЛ )
| B83 - Castings with special properties (cast iron and steel) |
Specification :
| 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 |
20KHGSFL ( 20ХГСФЛ ) - Casting alloy steel for general purposes: chemical composition, mechanical and physical properties, hardness
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