27H5GSML

highly loaded parts critical applications with a wall thickness up to 50 mm, working in conditions of shock and impact-abrasive wear

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % P, % C, % S, % Mo, %
GOST 977-88 91.18–92.41 0.9–1.2 0.9–1.2 5–5.5 < 0.02 0.24–0.28 < 0.02 0.55–0.6

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ Treatment
Castings GOST 977-88 1472 1177 5 20 392

Heat Treatment Modes

Treatment
Pretreatment - Normalization 970 - 990 ° C, Release 700 - 720 ° C
Final processing - Hardening 980 - 1000 ° C, Release 200 - 220 ° C

Standards

Standard Description
GOST 977-88

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness