| Grade : | VSt5sp ( ВСт5сп ) |
| Substitute: | Ст6сп, ВСт4сп |
| Classification : | Normal quality structural carbon steel |
| Equivalent grades: | Go here |
Chemical composition in % for grade VSt5sp ( ВСт5сп )
| C | Si | Mn | Ni | S | P | Cr | Cu | As |
| 0.28 - 0.37 | 0.15 - 0.35 | 0.5 - 0.8 | max 0.3 | max 0.05 | max 0.04 | max 0.3 | max 0.3 | max 0.08 |
Temperature of critical points for grade VSt5sp ( ВСт5сп ).
| Ac1 = 730 , Ac3(Acm) = 825 , Ar3(Arcm) = 815 , Ar1 = 690 |
Mechanical properties under Т=20oС for grade VSt5sp ( ВСт5сп )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Forging | 100 - 300 | longitudinal | 350 | 175 | 24 | 50 | 590 | Normalizing |
| Forging | 300 - 500 | longitudinal | 350 | 175 | 22 | 45 | 540 | Normalizing |
| Forging | 500 - 800 | longitudinal | 350 | 175 | 20 | 40 | 490 | Normalizing |
Technological properties for grade VSt5sp ( ВСт5сп )
| Weldability: | limited weldability. |
| Flakes : | not predisposed |
| Temper brittleness: | not predisposed |
Physical properties for grade VSt5sp ( ВСт5сп )
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
| Grade | MPa | 1/Grade | Watt/(m·Grade) | kg/m3 | J/(kg·Grade) | Ohm·m |
| 20 | 1.98 | 7850 | ||||
| 100 | 1.96 | |||||
| 200 | 1.91 | |||||
| 300 | 1.85 | |||||
| 400 | 1.64 | |||||
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Equivalent steels for grade VSt5sp ( ВСт5сп )
| USA | Germany | ||
| - | DIN,WNr | ||
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Types of delivery of grade VSt5sp ( ВСт5сп )
| B03 - Metal forming treatment. Forgings |
| В20 - Classification, nomenclature and general norms |
| В22 - Graded and shaped rolling |
| B23 - 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 |
VSt5sp ( ВСт5сп ) - Normal quality structural carbon steel: chemical composition, mechanical and physical properties, hardness
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