Designation
| Name |
The value |
| Designation GOST Cyrillic |
18Х12НМВФЛ |
| Designation GOST Latin |
18X12HMBFL |
| Transliteration |
18H12NMVFL |
| By chemical elements |
18Cr12НMoWV |
Description
18Х12НМВФЛ steel is used: for the manufacture of casting parts for gas turbines and axial compressors and other parts operating at temperatures up to +580 °C.
Note
Martensite steel-ferritic class.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
OST 108.961.04-80 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
V |
Mo |
W |
| OST 108.961.04-80 |
0.16-0.22 |
≤0.025 |
≤0.025 |
0.5-1 |
10.5-12.5 |
0.2-0.55 |
0.7-1 |
Rest |
0.15-0.3 |
0.6-0.8 |
0.7-1.1 |
Fe is the basis.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Casting parts of gas turbines. Annealing at 710-730 °C (extract 10-15 h), cooling with the furnace to 200 °C + normalization at 1100 °C, air cooling + normalization at 1050 °C, cooling with compressed air + vacation at 710-730 °C (extract 10-15 h), cooling with the furnace to 200 °C, air cooling |
| ≥471 |
≥638 |
≥13 |
≥35 |
≥290 |
200-250 |
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 |
| HB |
Brinell hardness number |
