70g
Springs of mechanisms and machines.
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 | 96.91–98.26 | 0.17–0.37 | 0.9–1.2 | < 0.25 | < 0.2 | < 0.25 | < 0.035 | 0.67–0.75 | < 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 | 1030 | 834 | 25 | 7 | Tempering 830 ° C, oil, leave 470 ° C | ||
| The plates | GOST 1577-93 | fat | 780 | 10 | |||||
| The tape is annealed. | GOST 2283-79 | annealing | 640–740 | 10–15 | |||||
| The tape is hardcore. | GOST 2283-79 | cold-work | 740–1180 |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Hire | GOST 14959-79 | heat-treated | 285 |
| Hire | GOST 14959-79 | raw | 241 |
| Sheet | GOST 1577-93 | annealing, fat | 229 |
Analogues
| USA | Germany |
|---|---|
| G15720 | 1.1259 (80Mn4) |
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 |