4. Mechanical properties

4.1 Digital data

Modulus of elasticity (MPa) :

• at 20 C 320,000

• at 1,000 C 270,000

• at 1,500 C 240,000

• at 2,000 C 160,000

Modulus of rigidity at 20 C (MPa) 120,000

Coefficient of compressibility at 20 C (Pa) 0.35

Poisson's ratio at 20 C 0.32

Friction coefficient on steel with hardness 44 RC :

• dry, static 0.271

• dry, dynamic 0.370

• wet, static 0.405

• wet, dynamic 0.465

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