Steel 20ГФЛ (20G1FL)

Designation

Name The value
Designation GOST Cyrillic 20ГФЛ
Designation GOST Latin 20GFL
Transliteration 20GFL
By chemical elements 20MnV
Name The value
Designation GOST Cyrillic 20Г1ФЛ
Designation GOST Latin 20G1FL
Transliteration 20G1FL
By chemical elements 20Mn1V

Description

20ГФЛ steel is used: for the manufacture of frames, beams, housings, parts of cars and other details for various branches of engineering; for the manufacture of casting parts for gas turbines and axial compressors operating at temperatures from -50 to +350 °C; senior cast parts of automatic coupler and trucks of freight and passenger cars, electric and disulphoton and locomotives.

Note

Steel pearlitic class.

Standards

Name Code Standards
Steel castings В82 GOST 977-88, OST 108.961.04-80, TU 24.05.486-82

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti
GOST 977-88 0.16-0.25 ≤0.05 ≤0.05 0.9-1.4 - 0.2-0.5 - Rest - 0.06-0.12 ≤0.05
TU 24.05.486-82 0.17-0.25 ≤0.04 ≤0.04 0.9-1.4 ≤0.3 0.3-0.5 ≤0.3 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 parts of gas turbines. Normalization at 930-970 °C, air cooling + vacation at 600-650 °C, air cooling
≥314 ≥510 ≥17 ≥25 ≥490
Casting parts well.d. composition. Normalizing or normalizing + vacation
314-343 ≥490 ≥20 ≥30 ≥490
≥343 ≥510 ≥18 ≥25 ≥490

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