08H18N10 (EI825)

For household items, apparatuses and parts in the food industry, for welded products operating in environments of higher aggressiveness than steel grade 12X18H10T without pressure limiting up to 600 degrees

pipes, fittings furnace parts, heat exchangers, muffles, retorts, fittings, manifolds exhaust systems, spark electrodes zazhi gatelnyh candles, welding machines and vessels of Chemical Engineering, operating at a temperature of -196 to 600 ° C in the middle of the active medium; austenitic steel

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Cu, % Ni, % P, % C, % S, %
GOST 5632-72 66.265–74 < 0.8 < 2 17–19 < 0.5 < 0.3 9–11 < 0.035 < 0.08 < 0.02

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} c\cdot 10^{-3}, \frac{J}{kg\cdot K} R\cdot 10^{-6}, \Omega\cdot m
20 196 17 7850 0.8
100 16 0.504
200 17
300 17
400 18
500 18

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{P}, MPa \epsilon_L, % \psi, % Treatment
Pipes are coldly deformed. GOST 9941-81 529 37
Pipes are hot deformed. GOST 9940-81 510 40
Rod GOST 5949-75 60 470 196 40 55 Hardening of 1020-1100 ° C
Bar of specified strength GOST 18907-73 640–780 20
The bar is hardened. GOST 18907-73 880–930
Forgings GOST 25054-81 470 196 38–40 45–50
The plates GOST 7350-77 510 205 43 Hardening of 1050-1100 ° C, air cooling
The sheet is thin and hardened. GOST 5582-75 930 10
Sheet thin is half-worked. GOST 5582-75 740–930 25
Sheet GOST 5582-75 510 185 45 Hardening of 1050-1080 ° C, cooling water
Sheet GOST 4986-79 530 20–40 Hardening of 1050-1080 ° C, air

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Forgings GOST 25054-81 1700

Technological Properties

Weldability
no limits

Analogues

USA Germany
S30400 1.4301 (X5CrNi18-10)

Standards

Standard Description
GOST 5632-72
GOST 7350-77
GOST 5582-75
GOST 4986-79
GOST 5949-75

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ti % Titan
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
c\cdot 10^{-3} \frac{J}{kg\cdot K} The specific heat of the material (range 20°C–T)
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

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