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production of tubular billet for the manufacture of seamless pipes.
production of tubular billet for the manufacture of seamless pipes.
| Standard | Si, % | Mn, % | Cu, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|
| 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 |
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Standard | Description |
|---|---|
| Standard | Description |
| OST 14-21 - 77 |
| Parameter | Units of measurement | Description |
|---|---|---|
| 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 |