Steel 20KHGSFL
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 20ХГСФЛ |
| Designation GOST Latin | 20XGCFL |
| Transliteration | 20HGSFL |
| By chemical elements | 20CrMnСV |
Description
20KHGSFL steel is used: for the manufacture of cast, welded-cast machine components in North; the hydraulic ducts; responsible welded-cast structures of large sections of career and draglines.
Note
Cold-resistant steel.
Standards
| Name | Code | Standards |
|---|---|---|
| Castings with special properties (iron and steel) | В83 | GOST 21357-87 |
| Steel castings | В82 | TU 24-1-12-181-75 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V |
|---|---|---|---|---|---|---|---|---|---|---|
| GOST 21357-87 | 0.14-0.22 | ≤0.02 | ≤0.02 | 0.9-1.3 | 0.3-0.6 | 0.5-0.7 | ≤0.4 | Rest | ≤0.3 | 0.07-0.13 |
Fe is the basis.
Mechanical properties
| sT|s0,2, MPa | σU, MPa | d | y, % | KCU, kJ/m2 |
|---|---|---|---|---|
| Casting. Quenching in water from 900-920 °C + vacation at 650-670 °C, air cooling (KCU-60) | ||||
| ≥450 | ≥600 | ≥14 | ≥25 | ≥3 |
| Casting. Normalization at 900-920 °C + vacation at 630-650 °C, air cooling (KCU-60) | ||||
| ≥320 | ≥500 | ≥18 | ≥30 | ≥3 |
Description mechanical marks
| Name | Description |
|---|---|
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU | Limit short-term strength |
| d | Elongation after rupture |
| y | The relative narrowing |
| KCU | Toughness |
Technological properties
| Name | The value |
|---|---|
| The tendency to temper brittleness | inclined |
