Products Archives - Graphite Electrode Manufacturer

Graphite Electrodes' Quality Indicators & Explanation

Graphite Electrodes of Quality Indicators(Reference Value)
Item		RP		HP		UHP
		≤ φ 300	≥ φ 350	≤ φ 400	≥ φ 450	≤ φ 400	≥ φ 450
Electrical Resistivity, ≤ ( μΩm )	Electrode	8.5		6.5		5.5
	Nipple	6.5		5.5		4.5
Bulk Density, ≥ ( g/cm3 )	Electrode	1.53	1.52	1.62	1.62	1.67	1.66
	Nipple	1.69		1.73		1.75
Bending Strength, ≥ ( Mpa )	Electrode	8.5	7.0	10.5	9.8	11.0
	Nipple	15.0		16.0		20.0
Elastic Modulus, ≤ ( Gpa )	Electrode	9.3		12.0		14.0
	Nipple	14.0		16.0		18.0
CTE(100-600℃), ≤ ( X10-6/℃ )	Electrode	2.9		2.4		1.5
	Nipple	2.8		2.2		1.4
Tip: These indicators are for reference only. The specific situation requires specific analysis.

1. Resistivity is a parameter to measure the conductivity of an electrode. The lower the resistivity, the better the conductivity of the electrode in use and the lower the consumption.
2. The bulk density is the ratio of the mass of the graphite electrode sample to its volume. Generally, the larger the bulk density of the same type of electrode, the lower the resistivity.
3. The flexural strength is a parameter that characterizes the mechanical properties of graphite materials. The electrodes and joints with high strength are less likely to be broken during use.
4. Elastic modulus is an important aspect of mechanical properties. It is an index to measure the elastic deformation ability of materials. The larger the elastic modulus, the more brittle the material, and the smaller the elastic modulus, the softer the material.
5. The coefficient of thermal expansion refers to the degree of expansion of the material after it is heated. The coefficient of thermal expansion in the quality index of the graphite electrode refers to the coefficient of axial thermal expansion.
6. In addition, ash and thermal shock resistance are also important quality indicators for graphite electrodes.