Steel ВСт4кп
Description
Steel ВСт4кп
Steel ВСт4кп: marochnik steels and alloys. Below the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points physical, mechanical, technological and casting properties of the brand — Steel ВСт4кп.
General information steel ВСт4кп
| Delivery type |
| Long products, including shapes: GOST 2590−71, 2591−71 GOST, GOST 2879−69, GOST 8509−86, GOST 8510−86, GOST 8239−72, 8240−72 GOST, GOST 380−71. The sheet GOST 16523−70. Strip, GOST 103−76, GOST 535−79. Pipe GOST 10705−80. |
| Application |
| Welded, riveted and bolted construction of increased strength in the form of long products, shapes and sheet rental and parts for light duty. |
Chemical composition of steel ВСт4кп
| Chemical element |
% |
| Silicon (Si), not more |
0.07 |
| Manganese (Mn) |
0.40−0.70 |
| Copper (Cu), not more |
0.30 |
| Arsenic (As), not more |
0.08 |
| Nickel (Ni), not more |
0.30 |
| Sulfur (S), not more |
0.05 |
| Carbon (C) |
0.18−0.27 |
| Phosphorus (P), not more |
0.04 |
| Chromium (Cr), not more |
0.30 |
Mechanical properties of steel ВСт4кп
Mechanical properties
| Heat treatment, delivery condition |
Cross-section, mm |
σ0,2, MPa |
σB, MPa |
δ5, % |
| Hot-rolled steel |
<20 |
255 |
400−510 |
25 |
| Hot-rolled steel |
20−40 |
245 |
400−510 |
24 |
| Hot-rolled steel |
40−100 |
235 |
400−510 |
22 |
| Hot-rolled steel |
>100 |
225 |
400−510 |
22 |
| Sheets hot-rolled |
<2,0 |
|
400−510 |
19 |
| Sheets hot-rolled |
2,0−3,9 |
|
400−510 |
21 |
| Sheets cold-rolled |
<2,0 |
|
400−510 |
21 |
| Sheets cold-rolled |
2,0−3,9 |
|
400−510 |
23 |
Technological properties of steel ВСт4кп
| The temperature of forging |
| The beginning of 1200, the end 850. |
| Weldability |
| Welded is limited. |
| Machinability |
| Under HB 152 Kυ TV.SPL. = 1,7, Kυ b.St. = 1,7. |
| The tendency to the selling ability |
| Tend not |
| Placeofpublication |
| Not sensitive |
Temperature of critical points of steel ВСт4кп
| Critical point |
°C |
| Ac1 |
735 |
| Ac3 |
840 |
| Ar3 |
825 |
| Ar1 |
680 |
Toughness of steel ВСт4кп
Impact strength, KCU, j/cm2
| Delivery condition, heat treatment |
+20 |
-20 |
-40 |
| Sheets hot-rolled 12 mm thick |
64−98 |
6−84 |
5−47 |
| Sheets hot-rolled 12 mm thick after annealing 680−700 With water |
65−138 |
6−97 |
5−28 |
Endurance limit of steel ВСт4кп
| σ-1, MPa |
σB, MPa |
| 196−225 |
400−510 |
