10H14G14N4T (EI711, H14G14N3T)

Welded equipment of chemical productions of weak aggressiveness, cryogenic equipment for receiving. liquefied gases. Details of furnace fittings and heat exchangers do700grad. Oxygen lines. Substitute stX18N10.

for manufacturing various welded equipment operating environments in chemical plants weak aggressiveness cryogenic techniques to -196 ° C, and also for use as a heat-resistant and heat-resistant material to 700 ° C .; austenitic steel

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, %
GOST 5632-72 64.545–71.2 < 0.8 13–15 13–15 2.8–4.5 < 0.035 < 0.1 < 0.02

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$
20 194 15 7800
100 189 16 17
200 181 16.7 18
300 170 17.5 21
400 164 18.4 24
500 159 19 30
600 161 19.5 36
700 20.1 43
800 20.6 51
900 21

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Forgings GOST 25054-81 < 600 637 245 Hardening of 1000-1080 ° C, the water
Grade GOST 5949-75 60 640 245 35 50 Hardening of 1000-1080 ° C, air cooling
Sheet GOST 7350-77 fat 590 245 40 hardening
Sheet GOST 5582-75 thin 690 295 35 Hardening of 1050-1080 ° C, cooling water

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Boundedly welded not sensitive not inclined

Standards

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
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

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