12DHN1MFL

weldments responsible loaded parts, which are requirements of sufficient strength and toughness, operating under the influence of static and dynamic loads

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % V, % P, % C, % S, % Mo, %
GOST 977-88 94.21–96.12 0.2–0.4 0.3–0.55 1.2–1.7 0.4–0.65 1.4–1.8 0.08–0.15 < 0.03 0.1–0.18 < 0.03 0.2–0.3

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 977-88 785 638 12 20 294
Castings GOST 977-88 981 735 10 20 294 Tempering 890-910 ° C, 520-630 ° C and Holidays

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy 217–269

Heat Treatment Modes

Treatment
Normalization 940 - 960 ° C, or Normalization 890 - 910 ° C, Release 520 - 630 ° C
Tempering 890 - 910 ° C, Vacation 520 - 630 ° C

Standards

Standard Description
GOST 977-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
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