55SL
for the production of gears and couplings handling machines, running wheels, sliders, gear sectors and rims and other parts, which are requirements of high hardness.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Steels and alloys for castings | Ordinary steel for castings |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|
| GOST 977-88 | 97.81–98.48 | 0.5–0.7 | 0.5–0.8 | < 0.045 | 0.52–0.6 | < 0.045 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Castings | GOST 977-88 | 687 | 334 | 10 | Normalization 840 - 880 ° C, Release 650 - 720 ° C | |||
| Castings | GOST 977-88 | 736 | 392 | 12 | Tempering 820 - 850 ° C, Release 650 - 720 ° C |
Heat Treatment Modes
| Treatment |
|---|
| Normalization 840 - 880 ° C, Release 650 - 720 ° C |
| Tempering 820 - 850 ° C, Release 650 - 720 ° C |
Standards
| Standard | Description |
|---|---|
| GOST 977-88 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{Y}$$ | $$MPa$$ | Yield strength |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |