Designation
| Name |
The value |
| Designation GOST Cyrillic |
12ХГН2МФБДАЮ |
| Designation GOST Latin |
12XGH2MFBDAJu |
| Transliteration |
12HGN2MFBDAYu |
| By chemical elements |
12CrMnН2MoVNbCuNAl |
| Name |
The value |
| Designation GOST Cyrillic |
ВС-4 |
| Designation GOST Latin |
BC-4 |
| Transliteration |
VS-4 |
| By chemical elements |
WС-4 |
Description
12ХГН2МФБДАЮ steel is used: for the manufacture of welded structures of wide application, have good ductility, high resistance to brittle fracture and satisfactory weldability.
Note
High strength low carbon alloy steel martensitic-bainitic class.
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В33 |
TU 14-1-4895-90 |
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
KCU, kJ/m2 |
| Sheet metal in delivery condition on the other 14-1-4895-90 (samples, KCU-70 °C) |
| 16-50 |
≥880 |
≥980 |
≥12 |
≥294 |
| 8-15 |
≥780 |
≥880 |
≥14 |
≥245 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| KCU |
Toughness |
Technological properties
| Name |
The value |
| Weldability |
Welded satisfactorily. To prevent the formation of cold cracks in welding joints of large thickness and "stiffness" should apply preheating at the rate of 1.5-2 min per 1 mm thickness of compound. When welding metal of thickness more than 20 mm the temperature of 80-100 °C. In welding of metal with thickness over 40 mm the temperature of 100-150 °C. |
