20HN3MFA (20HN3MF)
Production of forgings shaft compressor units and gas turbines, responsible heavily loaded parts operating at temperatures up to +500 ° C
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Alloyed structural steel |
Chemical composition
| Standard | Fe, % | Mn, % | Cr, % | Cu, % | Ni, % | V, % | P, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|
| OST 108.958.04 - 85 | 92.94–94.74 | 0.4–0.7 | 1.4–1.8 | < 0.3 | 3–3.5 | 0.06–0.12 | < 0.02 | < 0.02 | 0.4–0.6 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Forgings | OST 108.958.04 - 85 | < 300 | 785 | 666–880 | 35 | 490 | 13 |
Brinell hardness number
Standards
| Standard | Description |
|---|---|
| OST 108.958.04 - 85 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Cu | % | Copper |
| Ni | % | Nickel |
| V | % | Vanadium |
| P | % | Phosphorus |
| S | % | Sulfur |
| Mo | % | Molybdenum |
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 |