15H18N12S4TYU (EP502, EI793, EI654)

Welded products operating in air and corrosive environments.

welded constructions, working in air and aggressive environments; steel austenitic — ferritic class

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Ni, % Al, % P, % C, % S, %
GOST 5632-72 61.215–67.05 3.8–4.5 0.5–1 17–19 0.4–0.7 11–13 0.13–0.35 < 0.035 0.12–0.17 < 0.03

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 60 720 375 25 40 780 Hardening of 950-1050 ° C, cooling water
Forgings GOST 25054-81 < 600 Longitudinal 715 382
The plates GOST 7350-77 690–930 345 30 Hardening of 1020-1050 ° C, cooling water
Sheet GOST 5582-75 720 345 30 Hardening of 1020-1050 ° C, the water
The sheet is thin and hardened. GOST 5582-75 880 685 10
Sheet GOST 4986-79 690 13–25 Hardening of 1020-1050 ° C, cooling water
The sheet is thin and hardened. GOST 4986-79 830–1080 5–10

Standards

Standard Description
GOST 5632-72
TU 14-1-561-73
TU 14-1-915-74

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ti % Titan
Ni % Nickel
Al % Aluminium
P % Phosphorus
C % Carbon
S % Sulfur

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