20FL

large parts of freight cars: a housing coupler, traction clamp, bolster and side frame trucks.

Classification

Country Section Category
CIS, Russia, Ukraine Steels and alloys for castings Ordinary steel for castings

Chemical composition

Standard Fe, % Si, % Mn, % V, % P, % C, % S, %
GOST 977-88 97.81–98.9 0.2–0.52 0.7–1.2 0.06–0.12 < 0.05 0.14–0.25 < 0.05

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers σU, MPa σP, MPa ϵL, % ψ, % KCU103, Jm2 Treatment
Castings GOST 977-88 < 100 491 294 18 35 491 Normalization of 920-960 ° C, 600-650 ° C and Holidays

Heat Treatment Modes

Treatment
Normalization 920 - 960 ° C, Release 600 - 650 ° C

Analogues

USA
J13052

Standards

Standard Description
GOST 977-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur

Description of mechanical properties

Parameter Units of measurement Description
σU MPa Ultimate tensile strength
σP MPa Proportionality limit
ϵL % Elongation at break (longitudinal)
ψ % Reduction in cross section on fracture
KCU103 Jm2 Impact toughness