20YUCH (20YUCHA)
for the manufacture of pipes, casings, heads, flat flanges and other parts operating in environments containing hydrogen sulfide and carbon dioxide at temperatures ranging from -40 ° C to +475 ° C; parts of pipe fittings to the heat treatment; welded receptacles gas and petrochemical industries; seamless hot gas pipes increased corrosion resistance and cold resistance for use in the oil and gas pipeline systems, technological trade pipelines transporting oil and oil products, as well as in reservoir pressure maintenance systems in the conditions of the oil-producing companies operated in environments containing hydrogen sulfide and carbon dioxide.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Alloyed structural steel |
Chemical composition
| Standard | Fe, % | Si, % | Ca, % | Mn, % | Cu, % | Ni, % | Al, % | As, % | P, % | C, % | S, % | N, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-4853 - 90 | 97.883–99.139 | 0.17–0.37 | 0.001–0.01 | 0.5–0.8 | < 0.25 | < 0.25 | 0.03–0.1 | < 0.08 | < 0.02 | 0.16–0.22 | < 0.005 | < 0.012 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| The plates | TU 14-1-4853 - 90 | 10–160 | 410 | 234 | 23 |
Analogues
| Germany | USA |
|---|---|
| L 245 MB | 5L Gr B |
Standards
| Standard | Description |
|---|---|
| TU 14-1-4853 - 90 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Ca | % | Calcium |
| Mn | % | Manganese |
| Cu | % | Copper |
| Ni | % | Nickel |
| Al | % | Aluminium |
| As | % | Arsenic |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
| N | % | Nitrogen |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{Y}$$ | $$MPa$$ | Yield strength |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |