12H21N5T (EI811, 1X21H5T)

Details of special equipment.

welded and brazed structures operating in aggressive environments; austenite steel — 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 69.1–74.86 < 0.8 < 0.8 20–22 0.25–0.5 4.8–5.8 < 0.8 < 0.035 0.09–0.14 < 0.025

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
The plates GOST 7350-77 690 390 14 Hardening of 950-1050 ° C, cooling water
Sheet GOST 5582-75 690 440 18 Hardening of 1000-1050 ° C, air

Standards

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)