12X18H10T (H1T, Ee1t)

Used in the aviation industry. Parts with high mechanical loads, furnaces, muffles, and other equipment with a temperature of up to 800 hail, continuous operation of the combustion products at temperatures up to 900 hail in the atmosphere, good weldability, food-capacitive equipment

parts operating up to 600 ° C. Welding apparatus and vessels working in dilute solutions of nitric acid, acetic acid, phosphoric acid, alkali and salt solutions, and other parts operating under pressure at a temperature of from -196 to +600 ° C, and in the presence of corrosive media to +350 ° C .; austenitic steel

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Cryogenic structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 5632-72 66.725–74 < 0.8 < 2 17–19 < 0.3 9–11 < 0.035 < 0.12 < 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
20 198 15 7920 0.725
100 194 16.6 16 0.462 0.792
200 189 17 18 0.496 0.861
300 181 17.2 19 0.517 0.92
400 174 17.5 21 0.538 0.976
500 166 17.9 23 0.55 1.028
600 157 18.2 25 0.563 1.075
700 147 18.6 27 0.575 1.115
800 18.9 26 0.596
900 19.3

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{P}, MPa \epsilon_L, % \psi, % Treatment
Trumpet GOST 9941-81 cold rolling 549 35
Trumpet GOST 9940-81 hot rolling 529 40
Round GOST 5949-75 Ø < 60 510 196 40 55 Hardening of 1020-1100 ° C, air cooling
Wire GOST 18143-72 540–830 20–25
Forgings GOST 25054-81 < 1000 510 196 35–38 40–52 Hardening of 1050-1100 ° C, the water
Sheet GOST 7350-77 fat 530 235 38 Hardening of 1000-1080 ° C, cooling water
Sheet GOST 5582-75 thin 530 205 40 Hardening of 1050-1080 ° C, cooling water
Sheet GOST 5582-75 cold-work, thin 880–1080 10
Sheet GOST 5582-75 cold-work, half-load, thin 740 25

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Round 0–0

Technological Properties

Weldability Flake Susceptibility
no limits not sensitive

Analogues

USA Germany
S32109 1.4541 (X6CrNiTi18-10)

Standards

Standard Description
GOST 5632-72
GOST 5949-75

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
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