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In this paper, we analyzed the Hastelloy G30 by some techniques of characterization in order to interpret the results obtained through a computer simulation of the filling and the solidification of the casting. The design of the filling system, the riser and the plate was carried out by the software SOLIDWORKS. The thermo-physical properties of the alloy, the simulation of the filling and solidification of the casting was performed by the software ProCast. The software JMATPRO was used to confirm the thermo-physical properties of the alloy.
The validation of numerical results was done by the following experimental techniques : optical microscopy, hardness test and X-ray diffraction. The numerical and experimental results showed the appearance of a porosity caused by a non-uniform solidification of the casting, leading to embrittlement of the alloy
