Nodular cast iron grate

The specifications of nodular cast iron grate are in accordance with product technical standards and meet the needs of various aspects of the market. According to the different forms of carbon in pig iron, it can be divided into steel-making pig iron, cast pig iron and ductile iron. Pig iron is an iron-carbon alloy with a carbon content of more than 2%. Industrial pig iron generally has a carbon content of 2.5%-4%. The product contains C, SI, Mn, S, P and other elements. Iron ore is smelted in a blast furnace. The precipitated graphite is spherical cast iron. Spherical graphite has a smaller splitting effect on the metal matrix than flake graphite, making the strength of cast iron 70-90% of the strength of the matrix structure, tensile strength up to 120kgf/mm2, and good toughness. The chemical composition of ductile cast iron except iron is usually 3.6~3.8% carbon content, 2.0~3.0% silicon content, total manganese, phosphorus, and sulfur content not exceeding 1.5%, and appropriate amount of rare earth, magnesium and other nodulizers.