Steel 20FTL

Designation

Name The value
Designation GOST Cyrillic 20ФТЛ
Designation GOST Latin 20FTL
Transliteration 20FTL
By chemical elements 20VTi

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

Name Code Standards
Castings with special properties (iron and steel) В83 GOST 21357-87
Steel castings В82 TU 3-331-85

Chemical composition

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
Fe is the basis.

Mechanical properties

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

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