(1) Good toughness. The impact value is similar to that of medium carbon steel, and it is more than 10 times that of gray iron material.
(2) Strong corrosion resistance. In the water spray corrosion test, the corrosion amount in 90 days is only 1/40 of the steel pipe and 1/10 of the gray iron pipe. The service life is 2 times that of gray iron pipes and 5 times that of ordinary steel pipes.
(3) Good plasticity. The elongation is ≥7%, which is similar to that of high carbon steel, while the elongation of gray iron material is zero.
(4) High strength. Tensile strength ób≥420MPa, yield strength ós≥300MPa, which is the same as low carbon steel and three times that of gray iron material.
(5) Due to the spheroidal graphite microstructure of ductile iron, ductile iron is superior to cast steel in terms of reducing vibration ability, so it is more conducive to reducing stress. An important reason for choosing ductile iron is that ductile iron is less expensive than cast steel. The low cost of ductile iron makes this material more popular, casting efficiency is higher, and it also reduces the cost of machining ductile iron.
(6) The strength of ductile iron is comparable to that of cast steel. Ductile iron has a higher yield strength, with a minimum yield strength of 40k, while cast steel has a yield strength of only 36k. In most municipal applications, such as water, salt water, steam, etc., the corrosion resistance and oxidation resistance of ductile iron exceeds that of cast steel.
