For metal smelting, you can choose Shennai.

In the production of gray cast iron, people have been committed to producing castings with high strength and no white spots. To obtain high tensile strength, the first step is to select an appropriate carbon equivalent so that the molten iron in the casting has developed primary austenite crystals when solidifying; then, through inoculation and other treatments, fine and uniform A-type graphite is obtained, and try to maintain Continuity of the matrix;