What Is The hardness of Granite Surface Plate?

Granite surface plate is a natural stone material made of precision reference measurement tools, for the instrumentation, precision tools, mechanical castings inspection, are the ideal datum.

Granite surface plate pass the strict physical tests and the choice of granite, crystal is fine, texture is hard, compressive strength is 3750 kg / square centimeter, the hardness of Mohs hardness 6-7. Very resistant to wear, acid, alkali, high corrosion resistance, hand-lapping made, never rust. Granite belongs to non-metallic materials, no magnetic reaction, no plastic deformation. Its hardness is 2-3 times higher than that of cast iron (equivalent to HRC> 51), so the precision is good.