10H7MVFBR (EP505)

in power engineering — pipes and parts for continuous operation at temperatures of 600−620 degrees.

Classification

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

Chemical composition

Standard Fe, % B, % Cr, % Ni, % V, % P, % C, % S, % Nb, % Mo, %
GOST ЧМТУ 1154-64 88.925–92.28 < 0.005 6–8 0.5–1 0.3–0.5 < 0.025 0.07–0.12 < 0.025 0.15–0.4 0.7–1

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 246 25.5 7850 0.51
100 239.6 10.25
200 239 11.6
300 219.5 12.4
400 200.6 12.75
500 192 13.25
600 185 13.6
700 168.5 13.4
800 144.5

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
Trumpet Longitudinal 690 580 20 65 1000 Normalization of 980-100 ° C, air cooling, and Holidays 700-730 ° C, 3 hours, air cooling
Pipe billet Longitudinal 690 610 18 59 530 Annealing 800-830 ° C, furnace cooled, 30 ° C / h

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K
860 905 435 350

Standards

Standard Description
GOST ЧМТУ 1154-64

Description of chemical elements

Element Units of measurement Description
Fe % Iron
B % Bor
Cr % Chrome
Ni % Nickel
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Nb % Niobium
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
$$R\cdot 10^{-6}$$ $$\Omega\cdot m$$ Electrical resistivity

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 temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Ar3(Arcm) K
Ar1 K