U8GA
Hardness У8ГА after annealing (GOST 1435−99): HB 10 -1 = 187 MPa .
for the production of spring ribbon
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Tool steel | Carbon Tool Steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|
| GOST 1435-99 | 97.447–98.7 | 0.17–0.33 | 0.33–0.58 | < 0.2 | < 0.25 | < 0.25 | < 0.025 | 0.8–0.9 | < 0.018 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\epsilon_L$$, % | Treatment |
|---|---|---|---|---|---|---|---|
| Tape | GOST 2283-79 | annealing | 740 | 10 | |||
| Tape | GOST 2283-79 | cold-work | 740–1180 |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Alloy | GOST 1435-99 | annealing | 1870 |
Analogues
| Germany |
|---|
| 1.1830 (C85W) |
Standards
| Standard | Description |
|---|---|
| GOST 1435-99 |
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 |
|---|---|---|
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\epsilon_L$$ | % | Elongation at break (longitudinal) |