55SL

for the production of gears and couplings handling machines, running wheels, sliders, gear sectors and rims and other parts, which are requirements of high hardness.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % P, % C, % S, %
GOST 977-88 97.81–98.48 0.5–0.7 0.5–0.8 < 0.045 0.52–0.6 < 0.045

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Castings GOST 977-88 687 334 10 Normalization 840 - 880 ° C, Release 650 - 720 ° C
Castings GOST 977-88 736 392 12 Tempering 820 - 850 ° C, Release 650 - 720 ° C

Heat Treatment Modes

Treatment
Normalization 840 - 880 ° C, Release 650 - 720 ° C
Tempering 820 - 850 ° C, Release 650 - 720 ° C

Standards

Standard Description
GOST 977-88

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength