12GF-W (12ГФ)
Steel resistant to hydrogen sulfide cracking.
For the production of electric-welded longitudinal pipes for the construction of 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, % | Al, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-159-260-95 | 98.3–98.8 | 0.17–0.37 | 0.7–1 | < 0.3 | < 0.4 | < 0.3 | 0.04–0.08 | 0.02–0.06 | < 0.02 | 0.09–0.14 | < 0.012 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{0.2}$$, $$MPa$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Trumpet | TU 14-159-260-95 | 415–570 | 240–290 | 22–24 |
Standards
| Standard | Description |
|---|---|
| TU 14-159-260-95 | TU |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Cu | % | Copper |
| Ni | % | Nickel |
| V | % | Vanadium |
| Al | % | Aluminium |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{0.2}$$ | $$MPa$$ | Tensile stress required to produce a total elongation of 0.2% |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |