20GNMFL

casting, designed for operation at low temperatures and high loading rates — weldments of large sections bandages cement kilns

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % V, % P, % C, % S, % Mo, %
GOST 977-88 96.45–98.05 0.2–0.4 0.7–1.2 < 0.3 0.7–1 0.06–0.12 < 0.03 0.14–0.22 < 0.03 0.15–0.25

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 977-88 589 491 15 33 491 Normalization of 910-930 ° C, 600-650 ° C and Holidays
Castings GOST 977-88 687 589 14 30 589 Tempering 910-930 ° C, 640-660 ° C and Holidays

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy normalization, average vacation 202
Alloy Hardening, average vacation 217

Heat Treatment Modes

Treatment
Normalization 910 - 930 ° C, Release 600 - 650 ° C
Tempering 910 - 930 ° C, Vacation 640 - 660 ° C

Standards

Standard Description
GOST 977-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
V % Vanadium
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