Main properties of gray cast iron

- May 23, 2017-

Mechanical properties

The mechanical properties of gray iron are related to the microstructure of the Matrix and the morphology of graphite. The flake graphite in gray iron is very important to the matrix, and it is easy to cause stress concentration at the angle of graphite, so that the tensile strength, plasticity and toughness of gray iron are much lower than steel, but the compressive strength is similar to that of steel, and it is also the worst cast iron in common cast iron. At the same time, the Matrix microstructure has a certain effect on the mechanical properties of gray iron, and the graphite flake of ferrite matrix is thick, the strength and the hardness are lowest, therefore the application is few; the graphite flake of the pearlite Matrix Gray Iron is small, has the high strength and the hardness, mainly uses in the manufacture more important castings; the ferrite one pearlite matrix Gray cast iron The graphite piece is thicker than the pearlite gray iron, the performance is inferior to the pearlite gray Therefore, more industrial use is the pearlite matrix Gray cast iron.

Other performance

Gray iron has good casting performance, good vibration damping, good wear resistance, good machinability, low notch sensitivity.