Jour : 03/23/2026

3.1 Density and Elastic Modulus (Specific Stiffness)Thy of granite is approximately 2.65-3.02g/cm³, which is only 37%-43% of that of cas iron (6.8-7.3g/cm³); its elastic modulus ranges from 80-140GPa, slightly lower than gray cast iron110-130GPa), but far higher than artificial marble (30-55GPa).From the perspective of static load-bearing capacity, cast iron has higher absolute stiffness, but the…

Granite gantry bases have become a critical foundation component for high-precision, high-speed CNC machine tools to achieve ultra-precision machining, with theilue stemming from the extremely low internal stress, high damping characteristics, and low coefficient of thermal expansion endowed by natural geological aging. Compared with traditional cast iron and artificial marble (minesting) bases, granite demonstrates significant…