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 |
| Склонность к отпускной хрупкости |
inclined |
