Good cast iron covers toughness. Impact value and carbon steel exhaustive, is 10 times more gray iron material.

Cast iron covers corrosion resistance. Spray corrosion test, the amount of corrosion of steel is only ninety days of 1/40, 1/10 gray iron pipe. Life is twice as gray iron pipe, steel pipe is five times the ordinary.

Cast iron covers good plasticity. Elongation ≥7%, with similar high-carbon steel, and gray iron material elongation zero.

High-strength cast iron covers. Tensile strength ób≥420MPa, yield strength ós≥300MPa, and low-carbon steel and is three times gray iron material.

Since the microstructure of spheroidal graphite ductile iron, weakening vibration capability, ductile than steel, and therefore more conducive to reducing stress. Choose a ductile iron main reason is due to the ductile lower cost than steel. Ductile Iron low cost makes this material more popular, casting more efficient, less ductile iron machining costs.

Strength and intensity of cast ductile iron are comparable. Ductile iron has a higher yield strength, yield strength minimum of 40k, while the yield strength of steel is only 36k. In most municipal applications, such as: water, salt water, steam, etc., ductile iron corrosion resistance and oxidation resistance than steel.