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 and a fine structure. After billions of years of aging, it has a uniform texture, good stability, high strength, and excellent hardness, capable of maintaining performance under heavy loads. It is used in industrial production and laboratory measurement work.

Granite flats are reference measuring tools made of stone materials, ideal for inspecting instruments, tools, and mechanical parts. Especially in precision measurement, its characteristics make cast iron flats pale in comparison.

Granite flats are made from "Jinan Green" stone through mechanical processing and manual fine grinding. They feature a black luster, fine structure, uniform texture, good stability, high strength, and excellent hardness, capable of maintaining performance 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 measuring tools in mechanical factories.

Precision Requirements

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

Comparison of Granite Flat and Granite Characteristics and Advantages

Characteristics and advantages of granite platform stone:

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

2. Anti-abrasion, low maintenance, and maintenance-free.

3. Physically stable, with a dense structure. When impacted, crystal grains may fall off, but the surface remains smooth without affecting its flatness precision. Granite measuring platforms are easy to maintain, with stable material properties that ensure long-term non-deformation, low linear expansion coefficient, mechanical stability, and resistance to rust, magnetism, and insulation.

I. After long-term aging, the rock structure becomes uniform, with a small linear expansion coefficient and eliminated internal stress, ensuring no deformation.

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

III. Resistant to acid, alkali, and chemical erosion; will not rust; no need for oil coating; not prone to dust adhesion; easy to maintain and clean; long service life.

IV. Scratch-resistant, not limited by constant temperature conditions, and capable of maintaining measurement accuracy at room temperature.

V. Non-magnetic, smooth movement during measurement without stagnation, unaffected by humidity, and 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.