Steel 20FTL
Designation
Description
Steel 20FTL is used: for the manufacture of critical cast parts of automatic coupler and freight car trucks.
Note
Timeless cold-resistant low-alloy steel.
Standards
Chemical composition
Fe is the basis.
Name | The value |
---|---|
Designation GOST Cyrillic | 20ФТЛ |
Designation GOST Latin | 20FTL |
Transliteration | 20FTL |
By chemical elements | 20VTi |
Steel 20FTL is used: for the manufacture of critical cast parts of automatic coupler and freight car trucks.
Timeless cold-resistant low-alloy steel.
Name | Code | Standards |
---|---|---|
Castings with special properties (iron and steel) | В83 | GOST 21357-87 |
Steel castings | В82 | TU 3-331-85 |
Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti |
---|---|---|---|---|---|---|---|---|---|---|---|
GOST 21357-87 | 0.17-0.25 | ≤0.02 | ≤0.02 | 0.8-1.2 | ≤0.3 | 0.3-0.5 | ≤0.3 | Rest | ≤0.3 | 0.01-0.06 | 0.01-0.025 |
sT|s0,2, MPa | σU, MPa | d | y, % | KCU, kJ/m2 |
---|---|---|---|---|
Casting. Quenching in water from 930-950 °C + vacation at 600-650 °C, air cooling (KCU-60) | ||||
≥450 | ≥570 | ≥15 | ≥30 | ≥3 |
Casting. Normalization at 940-960 °C, air cooling (KCU-60) | ||||
≥320 | ≥520 | ≥20 | ≥35 | ≥3 |
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 |