09H16N4B (EP56, 1Х16Н4Б)

for high-stamped and welded structures and components operating in hostile environments; martensitic steel grade

Classification

Country Section Category
CIS, Russia, Ukraine Corrosion-resistant alloys and steels Corrosion-resistant ordinary steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, % Nb, %
GOST 5632-72 77.585–80.87 < 0.6 < 0.5 15–16.5 4–4.5 < 0.03 0.08–0.12 < 0.015 0.05–0.15

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
Rod GOST 5949-75 980–1180 835–930 8 40–45 590
Forgings GOST 25054-81 < 600 Longitudinal 931 784 7–8 35–42 490–590
The plates GOST 7350-77 1030 13 Annealing
The plates GOST 7350-77 1230 980 8 Hardening and tempering
Sheet GOST 5582-75 1130 Annealing 620-640 ° C, 4-8 h, cooling 200-300 ° C, the furnace

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Rod GOST 5949-75 annealing 321
Forgings GOST 25054-81 269–302

Standards

Standard Description
GOST 5632-72
TU 14-1-3564-83
TU 14-1-463-72

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur
Nb % Niobium

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