Introduction to the main performance of ductile iron

Ductile iron castings have been applied in almost all major industrial sectors, which require high strength, plasticity, toughness, wear resistance, severe thermal and mechanical impact resistance, high or low temperature resistance, corrosion resistance, and dimensional stability. In order to meet these changes in usage conditions, ductile iron has many grades, providing a wide range of mechanical and physical properties.

As specified by the International Organization for Standardization ISO 1083, most ductile iron castings are mainly produced in a non alloy state. Obviously, this range includes high-strength grades with a tensile strength greater than 800 Newtons per square millimeter and an elongation of 2%. The other extreme is high plasticity grades, with an elongation greater than 17% and corresponding lower strength (minimum of 370 Newtons per square millimeter). Strength and elongation are not the basis for designers to choose materials, and other decisive important properties include yield strength, elastic modulus, wear resistance and fatigue strength, hardness, and impact performance. In addition, corrosion resistance, oxidation resistance, and electromagnetic performance may be crucial for designers. To meet these special needs, a set of austenitic ductile iron, commonly known as Ni Resis ductile iron, has been developed. These austenitic nodular irons are mainly alloyed with nickel, chromium, and manganese and are listed in international standards.

It is a pearl shaped ductile iron with medium to high strength, moderate toughness, and plasticity, high comprehensive performance, good wear resistance and vibration reduction, and good casting process performance. It can change its performance through various heat treatments. Mainly used for various power machinery components such as crankshafts, camshafts, connecting shafts, connecting rods, gears, clutch plates, hydraulic cylinder blocks, etc.