30HL
for the manufacture of castings buildings absorbing devices wagons and other parts of various industrial applications; hinged cast chains normal strength for rotary kilns used in the cold zone at a temperature of the gas stream 200−500 ° C and heat exchangers rotating cement kilns
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Steels and alloys for castings | Ordinary steel for castings |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|
| GOST 977-88 | 97.37–98.55 | 0.2–0.5 | 0.5–0.9 | 0.5–0.8 | < 0.04 | 0.25–0.35 | < 0.04 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Castings | GOST 977-88 | 530 | 285 | 30 | 265 | 15 | ||||
| Castings | GOST 977-88 | 677 | 432 | 30 | 402 | 15 | Tempering 890 - 910 ° C, Vacation 620 - 660 ° C | |||
| Castings | GOST 977-88 | 660 | 550 | 20 | 10 | Hardening and tempering |
Heat Treatment Modes
| Treatment |
|---|
| Normalization 900 - 920 ° C, Vacation 550 - 650 ° C |
| Tempering 890 - 910 ° C, Vacation 620 - 660 ° C |
Standards
| Standard | Description |
|---|---|
| GOST 977-88 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| 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 |
| $$\psi$$ | % | Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |