80
Substitute: 70, 75, 85.
Round and flat springs and other parts operating in conditions of friction and under the action of vibration loads.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Spring-spring structural steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|
| GOST 14959-79 | 97.21–98.56 | 0.17–0.37 | 0.5–0.8 | < 0.25 | < 0.2 | < 0.25 | < 0.035 | 0.77–0.85 | < 0.035 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\psi$$, % | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|---|
| Rod | GOST 14959-79 | < 80 | 1079 | 932 | 30 | 8 | Tempering 820 ° C, oil, leave 470 ° C |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Hire | GOST 14959-79 | raw | 302 |
| Hire | GOST 14959-79 | heat-treated | 269 |
Analogues
| USA | Germany | European Union | Bulgaria |
|---|---|---|---|
| G10800 | C80D | 1.0622 | 80 |
Standards
| Standard | Description |
|---|---|
| GOST 14959-79 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Cu | % | Copper |
| Ni | % | Nickel |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
| $$\psi$$ | % | Reduction in cross section on fracture |