Not deformed

After long-term natural aging, the structure of the rock is uniform, the linear expansion coefficient is extremely small, the internal stress disappears completely, and it is not deformed.

High hardness

Good rigidity, high hardness, strong wear resistance, low temperature deformation.

long lasting

No need to apply oil, not easy to stick to dust, easy and simple maintenance, and long service life.

There will be no scratches, it is not blocked by constant temperature conditions, and its original physical properties can be maintained at room temperature.

Not magnetized

It can move smoothly during measurement, without a sense of stagnation, and is not affected by moisture. The plane is weighed well. Physical properties: specific gravity 2970-3070kg/m3; compressive strength: 2500-2600kg/cm2; coefficient of elasticity: 1.3-1.5×106kg/cm2 water absorption.