25GSL

the blades of the turbines, gear rims and wheel hub, sector, columns, details of welded and cast designs with a large amount of welding.

Classification

Country Section Category
CIS, Russia, Ukraine Steels and alloys for castings Ordinary steel for castings

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
TU 24-1-12-181 - 0 96.12–98.18 0.6–0.8 1–1.3 < 0.3 < 0.3 < 0.3 < 0.3 0.22–0.28 < 0.3

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
Castings < 100 470 245 18 30 290 Normalization of 900-920 ° C, 580-600 ° C and Holidays

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy Hardening 207
Alloy normalization, average vacation 1230–1490

Casting and technological parameters

linear shrinkage, %
2.2–2.3

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
no limits not sensitive not inclined

Standards

Standard Description
TU 24-1-12-181 - 0

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
$$\sigma _{U}$$ $$MPa$$ 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

Description of the casting and technological parameters

Parameter Units of measurement Description
linear shrinkage % The difference between model dimensions and the model casting

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