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| Grade : | 18G2АFD ( 18Г2АФД ) |
| Classification : | Structural steel for welding construct |
| Equivalent grades: | Is absent |
| C | Si | Mn | Ni | S | P | Cr | V | N | Cu | As |
| 0.14 - 0.22 | max 0.17 | 1.3 - 1.7 | max 0.3 | max 0.035 | max 0.03 | max 0.3 | 0.08 - 0.15 | 0.015 - 0.03 | 0.15 - 0.3 | max 0.08 |
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Sheet | 600 | 450 | 19 |
| Weldability: | without limitations. |
| В22 - Graded and shaped rolling |
| B23 - Sheets and Strips |
| В62 - Steel pipes and connecting parts to them |
| 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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