20HN3MFA (20HN3MF)

Production of forgings shaft compressor units and gas turbines, responsible heavily loaded parts operating at temperatures up to +500 ° C

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Alloyed structural steel

Chemical composition

Standard Fe, % Mn, % Cr, % Cu, % Ni, % V, % P, % S, % Mo, %
OST 108.958.04 - 85 92.94–94.74 0.4–0.7 1.4–1.8 < 0.3 3–3.5 0.06–0.12 < 0.02 < 0.02 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
Forgings OST 108.958.04 - 85 < 300 785 666–880 35 490 13

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Forgings 262–302

Standards

Standard Description
OST 108.958.04 - 85

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
V % Vanadium
P % Phosphorus
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