| Grade : | 15KHSND ( 15ХСНД ) ( 15ХСНД-Ш ) |
| Substitute: | 16Г2АФ, 15ГФ, 14ХГС, 16ГС, 14СНД |
| Classification : | Structural steel for welding construct |
| Equivalent grades: | Is absent |
Chemical composition in % for grade 15KHSND ( 15ХСНД )
| C | Si | Mn | Ni | S | P | Cr | V | N | Cu | As |
| 0.12 - 0.18 | 0.4 - 0.7 | 0.4 - 0.7 | 0.3 - 0.6 | max 0.035 | max 0.03 | 0.6 - 0.9 | max 0.12 | max 0.008 | 0.2 - 0.4 | max 0.08 |
Temperature of critical points for grade 15KHSND ( 15ХСНД ).
| Ac1 = 730 , Ac3(Acm) = 885 , Ar3(Arcm) = 803 , Ar1 = 650 |
Mechanical properties under Т=20oС for grade 15KHSND ( 15ХСНД )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Sheet, GOST 19282-73 | 5 - 9 | 500 | 350 | 21 | ||||
| Rolled stock, GOST 6713-91 | 470-685 | 335-345 | 19-21 | 290 | ||||
| Bars | to 140 | 480 | 345 | 21 |
Technological properties for grade 15KHSND ( 15ХСНД )
| Weldability: | without limitations. |
| Flakes : | not predisposed |
| Temper brittleness: | weakly predisposed |
Types of delivery of grade 15KHSND ( 15ХСНД )
| В22 - Graded and shaped rolling |
| B23 - Sheets and Strips |
| B33 - Sheets and Strips |
| В62 - Steel pipes and connecting parts to them |
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 |
15KHSND ( 15ХСНД ) - Structural steel for welding construct: chemical composition, mechanical and physical properties, hardness
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