08H22N6T (EP53, 0X22H5T)

Heat exchangers and parts of boilers. Welded chemical equipment in the environment of nitric acid, ammonium nitrate residue, in the production of antibiotics. A full replacement 08H18N10T in the industrial, marine and tropical atmosphere.

welded vessels and vehicles, the combustion chamber and other components of gas turbine apparatus housings bottom flanges, parts internals apparatuses, pipe bundles and wheels operating at a temperature of -10 to +300 ° C and under pressure in contact with corrosive fluids; 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, % Cu, % Ni, % P, % C, % S, %
GOST 5632-72 68.66–73.7 < 0.8 < 0.8 21–23 < 0.3 5.3–6.3 < 0.035 < 0.08 < 0.025

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}, MPa \alpha\cdot 10^{6}, K^{-1} \varkappa, \frac{W}{m\cdot K} \rho, \frac{kg}{m^3} R\cdot 10^{-6}, \Omega\cdot m
20 203 7600 0.74
100 201 9.6 14.6
200 193 13.8 15.9
300 181 16 18
400 165 16 19.6
500 162 16.4 21.3
600 154 16.2 22.6
700 141 16.5 23.8
800 139 16.7 26.3
900 17.1 29.7

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
Pipes are hot deformed. GOST 9940-81 588 24
Pipes are coldly deformed. GOST 9941-81 588 20
Forgings 539 343 18–20 35–40 390–780
The plates GOST 7350-77 590 345 18 590 Hardening of 1000-1050 ° C, cooling water
Sheet GOST 5582-75 640 20 Hardening of 950-1050 ° C, cooling water

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Forgings GOST 25054-81 140–200

Technological Properties

Weldability Propensity to temper brittleness
no limits inclined

Analogues

Germany USA
4878 JS 2205

Standards

Description of chemical elements

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

Description of physical characteristics

Parameter Units of measurement Description
E\cdot 10^{9} MPa Elastic modulus
\alpha\cdot 10^{6} K^{-1} Coefficient of thermal (linear) expansion (range 20°C–T)
\varkappa \frac{W}{m\cdot K} Coefficient of thermal conductivity (the heat capacity of the material)
\rho \frac{kg}{m^3} The density of the material
R\cdot 10^{-6} \Omega\cdot m Electrical resistivity

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

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures