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| Grade : | 03KH20N16АG6 ( 03Х20Н16АГ6 ) |
| Classification : | Сryogenic structural steel |
| Equivalent grades: | Is absent |
| Fe | C | Si | Mn | Ni | S | P | Cr | N |
| 50.05 - 58.85 | max 0.025 | max 0.6 | 6 - 7.5 | 15 - 16.5 | max 0.02 | max 0.025 | 20 - 25 | 0.15 - 0.28 |
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| 780 | 410 | 52 | 75 | 2200 | Guenching 1000oC, water, |
| Weldability: | without limitations. |
| 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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