Ductile iron pipe Ningde ductile iron pipe price Ningde ductile iron pipe wholesale
Ningde ductile iron pipe is a type of cast iron pipe. In terms of quality, the spheroidization level of cast iron pipe is controlled to be 1-3 (spheroidization rate> 80%), so the mechanical properties of the material itself have been better improved, with the nature of iron and the properties of steel. The annealed ductile iron pipe has a metallographic structure of ferrite plus a small amount of pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, easy installation, and is mainly used for water supply and gas transportation in municipal and industrial and mining enterprises , Oil transportation, etc.
A certain amount of spherical graphite is distributed on the ferrite and pearlite substrates. The ratio of ferrite and pearlite in the matrix structure is different according to the nominal diameter and the requirements for elongation. The ratio of pearlite of small diameter is different. Generally not more than 20%, the general control of large diameter is about 25%.
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