Graphite Block

Graphite Blocks are known for their high purity, with a fixed carbon content greater than or equal to 99.9%. They are used for a variety of purposes such as flexible graphite sealing materials, and as a substitute for platinum crucible for melting chemical reagents. They also serve as a base for lubricants, high purity graphite block for silicon carbide furnace, graphite furnace, and other metallurgical furnaces. 

In addition, they are used as furnace resistance furnace lining and conductive materials, as well as impermeable graphite heat exchanger. They are widely used in electronics, metallurgy, chemicals, steel, and other fields. 

Grade	HGB-1	HGB-2	HGB-3	HGB-4	HGB-5	HGB-6	HGB-7	HGB-8
Bulk density g/cm³	1.75	1.85	1.90	1.82	1.90	1.68	1.85	1.88
Resistivity uΩm	8~11	8~10	8~9	11~13	11~13	13~15	11~13	11~13
Thermal conductivity（100℃）W/m.k	110~120	130~140	130~140	110~120	110~120	80~100	100~120	110~120
Thermal expansion coefficient（room temperature-600℃）10-16/℃	5.46	4.75	4.8	5.8	5.85	5.8	5.9	5.85
Shore hardness HSD	42	48	53	65	70	60	68	72
Flexural strength Mpa	38	46	55	51	60	38	62	70
Compressive strength Mpa	65	85	95	115	135	80	135	160
Elastic Modulus Gpa	9	11.8	12	12	13	8.8	12	13
Porosity %	17	13	11	12	11	18	12	11
Ash PPM	500	500	500	500	500	500	500	500
Purified ash PPM	50	50	50	50	50	50	50	50
Graininess um	13~15	13~15	8~10	8~10	8~10	8~10	7	5
Recommended application areas	Universal	Universal	Continuous casting/ sintering/ Pyrometallurgy	EDM/ Photovoltaic	EDM/ Photovoltaic/ Glass	EDM	Universal/ EDM	EDM/ Photovoltaic/Glass

Graphite Blocks are versatile materials with numerous applications in various industries. 

1. Manufacturing Industry: Raw synthetic graphite blocks have a wide range of applications, particularly in the manufacturing industry. These blocks can be used for machining, welding, and cutting tools, as well as for electrodes, molds, and other industrial applications.

2. Semiconductor Industry: Fully machined graphite blocks offer the highest level of precision and accuracy, making them ideal for critical applications. These blocks undergo a series of machining processes, including milling, turning, and drilling, to achieve the required dimensions and surface finish. Fully machined graphite blocks are commonly used in the semiconductor industry for manufacturing equipment components.

3. Furnace Parts and Protection: Typical application of this material are furnace parts and protection, crucibles for low grade metals, boats and trays for sintering applications, thermite welding, and aluminum gas injection system parts.

4. Electrode Materials for the Metallurgical Industry: Graphite blocks have seen extensive application in a range of modern technological devices such as electrode materials for the metallurgical industry.

5. Heat-Redistribution Thermal Protection Systems: Graphite blocks are used in heat-redistribution thermal protection systems.

6. High-Power and High-Efficiency Electronic Equipment: Graphite blocks are used in other high-power and high-efficiency electronic equipment.