Grey cast iron specifications

- Jan 13, 2020-

The mechanical properties of gray cast iron are related to the structure of the matrix and the morphology of graphite. The flake graphite in gray cast iron severely cuts the matrix, and it is easy to cause stress concentration at the sharp corners of graphite, which makes the tensile strength, plasticity and toughness of gray cast iron much lower than that of steel, but the compressive strength is equivalent to that of steel. The worst mechanical properties of cast iron. At the same time, the matrix structure also has a certain effect on the mechanical properties of gray cast iron. The graphite sheet of ferritic gray cast iron is coarse, has the lowest strength and hardness, so it is less used; the graphite sheet of pearlite matrix gray cast iron is small and has a high Strength and hardness are mainly used to make more important castings; the graphite sheet of ferrite-pearlite gray cast iron is slightly larger than pearlite gray cast iron and its performance is not as good as pearlite gray cast iron. Therefore, the gray cast iron with a pearlite matrix is mostly used in industry.