The main mineral components of granite flat stone are pyroxene, plagioclase, a small amount of olivine, biotite, and trace magnetite. It has a black luster, fine structure, and after billions of years of aging, it has a uniform texture, good stability, high strength, and excellent hardness, capable of maintaining under heavy loads. It is used for measurement work in industrial production and laboratories.

Granite flats are reference measurement tools made of stone materials, ideal for inspecting instruments, tools, and mechanical components. Especially in precision measurement, due to its characteristics, it outperforms cast iron plates.

Granite flats are made from "Jinan Green" stone through mechanical processing and manual fine grinding. They have a black luster, fine structure, uniform texture, good stability, high strength, and excellent hardness, capable of maintaining under heavy loads and general temperatures. They also offer advantages such as being rust-proof, wear-resistant, non-magnetic, and non-deformable. Granite flats are suitable for measurement tools in mechanical factories.

Precision Requirements

Granite flats (marble platforms) undergo processes from cutting and shaping to coarse grinding and then fine grinding in a constant temperature room, with strict requirements and suitable temperatures throughout. The precision requirements are higher than those of cast iron measuring tools. They are suitable for production projects with high precision demands.

Comparison of Granite Flat and Granite Characteristics and Advantages

Characteristics and advantages of granite platform stone:

1. Non-deformable, high hardness, strong wear resistance.

2. Resistant to abrasion and corrosion, maintenance-free.

3. Physically stable, with a dense structure; upon impact, grains may detach without creating burrs on the surface,不影響其平面精度. The granite measurement platform has a work surface that is easy to maintain, with stable material properties ensuring long-term non-deformation, low linear expansion coefficient, mechanical strength, rust resistance, anti-magnetic properties, and insulation.

一、After long-term aging, the rock has a uniform organizational structure, small linear expansion coefficient, eliminated internal stress, and does not deform.

二、High rigidity, excellent hardness, strong wear resistance, and minimal thermal deformation.

三、Resistant to acids, alkalis, and corrosive substances; will not rust, no need for oil coating, not prone to dust adhesion, easy to maintain and保養(yǎng), with a long service life.

四、No scratches will occur, not hindered by constant temperature conditions, capable of maintaining measurement accuracy even at room temperature.

五、Non-magnetic, smooth movement during measurement without stickiness, unaffected by humidity, with stable flatness. Physical properties: Specific gravity 2970-3070 kg/m3, compressive strength: 2500-2600 kg/cm3, elastic modulus: 1.3-1.5×10? kg/cm2, water absorption rate.