Equipe técnica · Kintek Solution

Graphite is a versatile material known for its unique mechanical properties.

10 Key Points to Know About the Mechanical Properties of Graphite

1. Compressive Strength

• Compressive strength is the ability of graphite to withstand a crushing force without breaking or deforming.
• The minimum value of compressive strength for graphite is 31 MPa (SI units).
• The maximum value is 50.038 MPa (imperial units).

2. Ductility

• Ductility measures the ability of a material to deform under tensile stress, allowing it to be stretched or drawn into a wire.
• The minimum value of ductility for graphite is 0.00171 (SI units).
• The maximum value is 0.00189 (imperial units).

3. Elastic Limit

• Elastic limit refers to the maximum stress that a material can withstand without permanent deformation.
• The minimum value of elastic limit for graphite is 4.8 (SI units).
• The maximum value is 11.0229 (imperial units).

4. Endurance Limit

• Endurance limit represents the maximum stress amplitude that a material can withstand for an infinite number of cycles without failure.
• The minimum value of endurance limit for graphite is 15.47 (SI units).
• The maximum value is 2.61793 (imperial units).

5. Thermal and Chemical Resistance

• Graphite has extremely high thermal and chemical resistance.
• It also has excellent thermal shock resistance.

6. Electrical and Thermal Conductivity

• Graphite has high electrical and thermal conductivity.
• Its strength increases with rising temperature.

7. Ease of Machining

• Graphite is easy to machine.
• It can be produced with high purity.

8. Industrial Applications

• Graphite is widely used in various industries such as nuclear, metallurgical, semiconductor, solar, continuous casting, and EDM.
• It is commonly used as a die material in hot pressing equipment due to its low density, thermal stability, and mechanical strength.

9. Limitations

• Graphite has limitations in terms of high pressure applications.
• It can react with certain materials like transition metals, nitrides, and silicides from transition metals.

10. Thermal Shock Resistance and Chemical Inertness

• Graphite tubes become stronger when heated from room temperature to 2000 °C.
• They have exceptional thermal shock resistance and are chemically inert, making them suitable for applications where corrosion is a concern.

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