30HG1 (5MFRL)

for producing castings for various industrial applications

Classification

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

Chemical composition

Standard Fe, % Si, % B, % Mn, % Cr, % V, % P, % C, % S, % Mo, %
GOST 977-88 95.215–96.844 0.4–0.6 0.006–0.01 1.4–1.8 0.5–1 0.2–0.4 < 0.03 0.25–0.32 < 0.025 0.4–0.6

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\psi$$, % $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ d5, % Treatment
Castings GOST 977-88 981 638 5 49 4 Normalization 910 - 960 ° C
Castings GOST 977-88 1275 932 4 147 2 Tempering 870 - 890 ° C, Vacation 220 - 280 ° C

Heat Treatment Modes

Treatment
Normalization 910 - 960 ° C
Tempering 870 - 890 ° C, Vacation 220 - 280 ° C

Standards

Standard Description
GOST 977-88

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\psi$$ % Reduction in cross section on fracture
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness