12G2S
Alloy steel.
For the manufacture of welded longitudinal gas pipes for main gas and oil pipelines.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Low alloy structural steel for welded structures |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | V, % | As, % | P, % | C, % | S, % | N, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 19281-2014 | 97.25–97.25 | 0.5–0.8 | 1.3–1.7 | < 0.3 | < 0.3 | < 0.3 | < 0.12 | < 0.08 | < 0.03 | 0.09–0.15 | < 0.035 | < 0.008 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|---|
| Sheet | TU 14-1-1921-76 | 490 | 345 | < 390 | 22 | ||||
| Grade | GOST 19281-2014 | < 250 | 430 | 265 | 21 | ||||
| Grade | GOST 19281-2014 | < 140 | 480 | 345 | 21 |
Standards
| Standard | Description |
|---|---|
| GOST 19281-2014 | GOST |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Cu | % | Copper |
| Ni | % | Nickel |
| V | % | Vanadium |
| 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 |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |