Designation
| Name |
The value |
| Designation GOST Cyrillic |
20Х3МВФЛ |
| Designation GOST Latin |
20X3MBFL |
| Transliteration |
20H3MVFL |
| By chemical elements |
20Cr3MoWV |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ415Л |
| Designation GOST Latin |
EI415L |
| Transliteration |
EhI415L |
| By chemical elements |
- |
Description
20Х3МВФЛ steel is used: for the manufacture of casting parts for gas turbines and axial compressors operating at temperatures up to +560 °C.
Note
Steel pearlitic class.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
OST 108.961.04-80, TU 108.02.123-87 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
W |
| OST 108.961.04-80 |
0.16-0.24 |
≤0.025 |
≤0.03 |
0.35-0.75 |
2.8-3.3 |
0.2-0.42 |
≤0.6 |
Rest |
≤0.2 |
0.6-0.85 |
0.35-0.55 |
0.3-0.5 |
Fe is the basis.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Casting parts of gas turbines. Quenching in oil with 1030-1060 °C + vacation at 660-700 °C, air cooling |
| ≥441 |
≥589 |
≥12 |
≥35 |
390 |
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 |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
