Heat resistant high alloy structural steel 20X25H25TY

Deformable pipes made of this steel are used for the manufacture of high-temperature equipment for 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, % Mn, % Cr, % Ti, % Cu, % Ni, % V, % Al, % C, % Mo, % W, % ET, %
TU 1320-003-18648658-00 43.06–49.4585 0.5–0.85 0.5–1.05 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 < 0.04

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 14.4 13.7 7880

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Trumpet TU 1320-003-18648658-00 600 Transverse raw, fat, Transverse > 500 > 225 > 25

Standards

Standard Description
GOST 5632-14
TU 1320-003-18648658-00

Description of chemical elements

Element Units of measurement Description
ET % Total other items
Fe % Iron
Si % Silicon
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