We are professional in manufacturing and exporting all kinds of granite products.
Granite square box are made of selected black granite. These triangular shaped granite squares are ideal for checking X, Y and Z axes of machine bases or parts. They are very rigid and stable. The two face master angle has two narrow perpendicular edges finished flat and square.
The physical properties of the granite are as follows:
1. Granite mainly consists of pyroxene, plagioclase, a small amount of olivine, biotite and
micromagnetite.
2. Its structure is hard and compact.
3. It has solidified over millions of years resulting in its homogeneity, reliable stability, high
2. Its structure is hard and compact.
3. It has solidified over millions of years resulting in its homogeneity, reliable stability, high
strength and super hardness.
4. Can keep high precision under heavy load.
5. Be suitable for measuring applications.
4. Can keep high precision under heavy load.
5. Be suitable for measuring applications.
6. Specific gravity: 2970-3070kg/m3.
7. Compressive strength: 245-254N/mm2.
8. Elastic modulus: 1.27-1.47 N/mm2.
9. Linear expansivity: 4.61*10-6/Celsius degree.
10. Water absorption: <0.13%
11. Shore hardness: Higher than Hs70. Welcome you to contact us for the more information and it is our pleasure to supply the superior products, quite reasonable price, best service to you for our mutual benefit and long friendly cooperation.