12H21N5G2STL
for producing castings for various industrial purposes; Steel austenitic-ferritic class.
for producing castings for various industrial purposes; Steel austenitic-ferritic class.
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ti, % | Ni, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ti, % | Ni, % | P, % | C, % | S, % |
| GOST 977-88 | 67.6–75.5 | < 1.5 | < 2 | 20–22 | < 0.7 | 4.5–6 | < 0.045 | < 0.12 | < 0.035 |
| 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 |
| Castings | GOST 977-88 | 549 | 343 | 10 | 196 | 12 | Hardening 1050 - 1100 ° C, cooling in water or in air |
| Standard | Description |
|---|---|
| Standard | Description |
| GOST 977-88 |
| 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 |