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production of tubular billet for the manufacture of seamless pipes.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Carbonaceous quality structural steel |
Chemical composition
| Standard | Si, % | Mn, % | Cu, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|
| OST 14-21 - 77 | 0.17–0.37 | 0.65–0.9 | < 0.25 | < 0.045 | 0.41–0.48 | < 0.045 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe billet | OST 14-21 - 77 | Ø 80 | 650 | 380 | 40 | 400 | 16 | Normalization |
Standards
| Standard | Description |
|---|---|
| OST 14-21 - 77 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Si | % | Silicon |
| Mn | % | Manganese |
| Cu | % | Copper |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{Y}$$ | $$MPa$$ | Yield strength |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\psi$$ | % | Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |