Steel 55S2A

Designation

Name The value
Designation GOST Cyrillic 55С2А
Designation GOST Latin 55C2A
Transliteration 55S2A
By chemical elements 55С2

Description

55S2A steel is used: for the manufacture of springs for vehicles, springs of rolling stock of railway transport, other carriage springs in various branches of engineering.

Note

Steel spring alloy of high quality.

Standards

Name Code Standards
Bars and shapes В32 GOST 14959-79, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Steel wire medium and high carbon В72 GOST 26366-84
Sheets and strips В33 TU 14-1-1986-77, TU 14-130-278-96

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 14959-79 0.53-0.58 ≤0.025 ≤0.025 0.6-0.9 ≤0.3 1.5-2 ≤0.25 Rest ≤0.2
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Rolled steel. Quenching in oil from 870 °C to + Vacation at 460-470 °C
80 1177-1200 1275-1300 ≥6 ≥30
Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Quenching in oil or water from 870 °C to + vacation at 470 °C
≥1175 ≥1270 ≥6 ≥30

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

Technological properties

Name The value
Weldability does not apply to welded structures
Склонность к отпускной хрупкости tend not
Flock-sensitive sensitivity not sensitive