Ductile iron castings

Ductile iron casting is a kind of cast iron, an alloy of iron, carbon and silicon. Graphite in nodular cast iron exists in the form of ball. Generally, the size of graphite is grade 6-7, and the nodularization grade of cast pipe is required to be Grade 1-3 (nodularization rate ≥ 80%). Therefore, the mechanical properties of the material itself are mainly affected by the actual effect, which has the nature of iron and the properties of steel. The microstructure of the annealed ductile iron pipe is ferrite with a little pearlite, and its mechanical properties are better.
Ductile iron casting is mainly called centrifugal ductile iron pipe. It has the nature of iron, the performance of steel, stable performance, excellent performance, strong extension, good sealing effect, simple installation, and is mainly used for municipal, industrial and mining enterprises water supply, gas transmission, oil transportation, etc. Is the integrity of water supply pipe business, with high cost performance. Compared with PE pipe, the installation time of nodular graphite pipe is simpler than that of PE pipe, the speed is suitable, and the internal and external bearing pressure is better after installation; From the perspective of airtightness and performance stability, the installation of nodular graphite tube has excellent airtightness, which can also be improved by a variety of performance stability means; From the hydraulic performance point of view, because the specification of nodular graphite pipe generally refers to the inner diameter, the specification of PE pipe generally refers to the outer diameter, because under the same specification conditions, the nodular graphite pipe can achieve large runoff; From the comprehensive installation and maintenance cost point of view, the nodular tube has excellent cost performance. The inner wall is sprayed with zinc, and the cement mortar is stable.