K213 is an iron-based precipitation hardening type equiaxed crystal casting superalloy, mainly adding aluminum and titanium elements to form a γ'precipitation strengthening phase, adding a certain amount of chromium and tungsten elements for solid solution strengthening, and adding an appropriate amount of boron to strengthen the grain boundary. The alloy has good casting properties and can have good comprehensive properties and structural stability below 750°C.

Chemical composition:
    C              Cr              Ni               W             Al               Ti             Fe               B           Si        Mn         S           P
≤0.10   14.00-16.0  34.00-38.0  4.00-7.00  1.50-2.00   3.00-4.00   Balance   0.05-0.10  ≤0.50  ≤0.50  ≤0.015   ≤0.015

K213 physical properties:

Melting point: 1324ºC~1361ºC;

Density: ρ=8.14g/cm3;

Expansion coefficient: 20~800ºC: 18.61x10-6ºC-1;

Hardness at room temperature (standard heat treatment): HBS325

K213 mechanical properties:

20ºC: The yield strength is 745Mpa, and the elongation rate is 4.0%;

800ºC: The yield strength is 645Mpa, and the elongation rate is 8.6%.
High temperature lasting: 800ºC, 245Mpa is greater than 700h, 294Mpa is greater than 250h.

Main application of K213:

The alloy is used to make radial-flow supercharged turbines, axial-flow supercharged turbine blades, gas turbines and gas turbine motor and stationary blades that work for a long time below 750°C. The batch production and use are in good condition.