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
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 |
|
|