18G2S

Weldability without restrictions.

armature for reinforcement of ordinary and prestressed concrete structures; Earrings, links, fingers, traverse, detail couplers trolleys, etc… Parts operating from -40 to +450 degrees, valves class A-II (A300)

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Low alloy structural steel for welded structures

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 5781-82 96.285–98.06 0.6–0.9 1.2–1.6 < 0.3 < 0.3 < 0.3 < 0.04 0.14–0.23 < 0.045

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers σU, MPa σP, MPa ϵL, % Treatment
Fittings GOST 5781-82 40–80 490 295 19

Technological Properties

Weldability
no limits

Analogues

Hungary Czech Republic
A2 10335

Standards

Standard Description
GOST 5781-82

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 mechanical properties

Parameter Units of measurement Description
σU MPa Ultimate tensile strength
σP MPa Proportionality limit
ϵL % Elongation at break (longitudinal)

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