Heat resisting structural steel 20X25H25TYUL

No foreign analogues

Shaped castings are used in the manufacture of parts for high-temperature equipment of oil refining and petrochemical industries

Classification

Country Section Category
CIS, Russia, Ukraine Heat resistant steels and alloys Heat resistant high alloy steel

Chemical composition

Standard Fe, % Si, % B, % Mn, % Cr, % Ti, % Cu, % Ni, % V, % Al, % C, % Mo, % W, %
TU 4112-161-00220302-2011 43.093–49.3565 0.55–0.85 0.002–0.007 0.55–1.05 24.5–26.5 0.18–0.6 < 0.2 24.5–26.5 0.0005–0.1 0.18–0.6 0.18–0.3 0.0005–0.1 0.0005–0.1

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$
20 205 15.47 13.8 7880

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Castings GOST 977-88 600 Transverse raw, fat, Cast, Transverse > 500 > 225 > 25

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Castings TU 4112-161-00220302-2011 raw, fat, Cast, Transverse 205–215

Standards

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

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
B % Bor
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
V % Vanadium
Al % Aluminium
C % Carbon
Mo % Molybdenum
W % Tungsten

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