Based on material classification, QT900-2 is considered a high-grade material with a microstructure consisting of bainite or tempered martensite. Ductile iron plates are widely used in grinding applications due to their high hardness, excellent wear resistance, strong tensile strength, and minimal deformation under load. These properties make them a preferred material among manufacturers for high-precision grinding plates, pressure casting plates, as well as for welding platforms, layout plates, assembly tables, inspection platforms, laboratory surfaces, machine tool workbenches, and other cast iron equipment.
In the field of cast iron surface plates, ductile iron serves as an upgraded alternative to gray iron and is increasingly becoming one of the primary raw materials replacing it. As a high-performance material, ductile iron is also used in the production of municipal castings such as manhole covers and drainage grates.
Ductile iron plates can be manufactured to meet national standard requirements, with non-standard sizes achieving nanoscale precision and surface roughness as low as Ra0.012. Most high-precision surface plates are made from ductile iron. Standard accuracy grades include 000, 00, 0, 1, 2, and 3, and custom precision plates can also be produced.
Key advantages of ductile iron plates include:
Long-term dimensional stability and resistance to deformation;
Superior wear resistance compared to gray iron, resulting in extended service life;
High surface hardness, reducing susceptibility to scratching;
Better compressive and tensile strength than gray iron, making them suitable for high-load applications.
Although ductile iron plates involve higher manufacturing costs and have not yet been fully popularized, their superior performance-to-cost ratio positions them as a replacement for gray iron plates in modern industrial applications.