Structural steel alloyed 30X23H7SL in castings

No foreign analogues

Used in the manufacture of shaped castings for high-temperature equipment of oil refining and petrochemical industries

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel High strength high alloy structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % C, % Mo, % ET, %
TU 4112-161-00220302-2011 63.63–71.8 0.5–1.2 0.5–1 21–25 < 0.3 6–8 0.2–0.3 < 0.5 < 0.07

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$
20 198 13.7 14 7730

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Trumpet TU 4112-161-00220302-2011 > 539 > 245 > 12

Твёрдость по Роквеллу

Rolling Standard Classifiers Value, HRC
Trumpet TU 4112-161-00220302-2011 30–32

Casting and technological parameters

linear shrinkage, %
1.5–2.5

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Boundedly welded sensitive loathsome

Limit operating modes

Standard Температура, °C
TU 4112-161-00220302-2011 < 500

Standards

Standard Description
TU 4112-161-00220302-2011 TU 4112-161-00220302-2011

Description of chemical elements

Element Units of measurement Description
ET % Total other items
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
C % Carbon
Mo % Molybdenum

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
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength

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