Steel 18Х12НМВФЛ

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