03H20N16AG6

Welded large-sized tanks with a periodic change of rp from +20 to -269grad for a long time under pressure. Replacement of CX18H10 in 55% nitric to-those and medium-oxidizing environments, prom. the atmosphere.

for welded large vessels and tanks under pressure at temperatures from 20 to -269 degrees.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, % N, %
50.05–58.85 < 0.6 6–7.5 20–25 15–16.5 < 0.025 < 0.025 < 0.02 0.15–0.28

Information on suppliers

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
Alloy 780 410 52 75 2200 Hardening 1000 ° C, the water

Technological Properties

Weldability
no limits

Standards

Standard Description
TU 14-1-3291-81
TU 14-1-2922-80

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
N % Nitrogen

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