12H14N14V2M

superheater tubes, steam pipes and manifolds for continuous service at temperatures up to 550−650 degrees.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, % Mo, % W, %
64.935–71.3 0.3–0.8 < 0.7 13–15 13–15 < 0.035 < 0.15 < 0.03 0.4–0.6 2–2.75

Physical characteristics

Temperature, °C $E\cdot 10^{9}$, $MPa$ $\alpha\cdot 10^{6}$, $K^{-1}$ $\varkappa$, $\frac{W}{m\cdot K}$ $\rho$, $\frac{kg}{m^3}$ $c\cdot 10^{-3}$, $\frac{J}{kg\cdot K}$ $R\cdot 10^{-6}$, $\Omega\cdot m$
20 202 8100 0.461
100 200 15.6 6.3 0.486 0.83
200 192 15.7 11.8 0.515 0.89
300 184 17.3 16.7 0.536 0.95
400 178 17.3 20.9 0.544 1.01
500 171 17.3 24.3 0.557 1.05
600 163 18.2 27.2 0.59 1.08
700 157 18.4 29.7 0.624 1.13

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 560 260 44 60 1300
Rod 25 570 228 67.7 62.8 3400

Weldability
no limits

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur
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
$c\cdot 10^{-3}$ $\frac{J}{kg\cdot K}$ The specific heat of the material (range 20°C–T)
$R\cdot 10^{-6}$ $\Omega\cdot m$ 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

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