Steel 12ХГН2МФБДАЮ (sun-4)

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.