Steel 12K
Designation
| Name |
The value |
| Designation GOST Cyrillic |
12К |
| Designation GOST Latin |
12K |
| Transliteration |
12K |
| The chemical elements |
12 |
Description
12K steel is used: for the manufacture of parts of boilers and sosudov working under pressure at ambient, elevated and reduced temperatures.
Note
From 01.01.1991 steel stamps 12K is not allowed to use in the newly created and upgraded technology.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 19903-74, GOST 19903-90, GOST 5520-69 |
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
| Leaves categories: 2-5, 10, 11, 16, 18 (KCU - as supplied / after mechanical aging) |
| ≤20 |
≥225 |
350-440 |
≥24 |
≥780/390 |
| 21-40 |
≥215 |
350-440 |
≥24 |
≥780/390 |
| 41-60 |
≥205 |
350-440 |
≥24 |
≥780/390 |
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 |
| Weldability |
Welded without any restrictions. |
