Steel DB
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ДБ |
| Designation GOST Latin |
DB |
| Transliteration |
DB |
| The chemical elements |
CuNb |
Description
DB steel is used: for the production of billets of circular cross-section of steel treated liquid synthetic slag in the ladle and is intended for the production of seamless pipes gorjachedeformirovannye.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-3500-82 |
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
| Tubular billet on the other 14-1-3500-82. Normalization |
| 25 |
≥373 |
≥638 |
≥19 |
≥590 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
The macrostructure of billets on the other 14-1-3500-82 shall conform to the requirements of OST 14-21-77. Contamination of metal non-metallic inclusions shall not exceed the maximum score: - sulphides (S) - 3.5 points; - on oxides and silicates (FROM, OS, SP, SH) - 4.0 points. |
