7HF
The temperature of the critical points of the 7XF alloy: Ac1 = 770, Ac3 (Acm) = 780, Ar3 (Arcm) = 740, Ar1 = 710. Hardness after annealing: HB 10 -1 = 229 MPa.
for the manufacture of woodworking tools
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Tool steel | Alloy tool steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|
| GOST 5950-73 | 97.225–98.37 | 0.15–0.35 | 0.3–0.6 | 0.4–0.7 | < 0.035 | 0.15–0.3 | < 0.03 | 0.63–0.73 | < 0.03 |
Information on suppliers
Critical point temperatures
| Ac1, K | Ac3(Acm), K | Ar3(Arcm), K | Ar1, K |
|---|---|---|---|
| 770 | 780 | 740 | 710 |
Analogues
| Germany |
|---|
| 1.2327 (86CrMoV7) |
| 62SiMnCr4 |
| 86CrMoV7 |
Standards
| Standard | Description |
|---|---|
| GOST 5950-73 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Ni | % | Nickel |
| V | % | Vanadium |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of temperatures of critical points
| Parameter | Units of measurement | Description |
|---|---|---|
| Ac1 | K | |
| Ac3(Acm) | K | |
| Ar3(Arcm) | K | |
| Ar1 | K |