Boron Carbide
Material properties Norm Symbol/Unit TETRABOR®
Density DIN EN 623-2 ρ [g/cm3] >2.48
Porosity DIN EN 623-2 P [%] <0.5
Mean grain size [μm] <10
Phase composition B4C, C
Vickers hardness DIN EN 843-4 HV 1 [GPa] 26
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 27
Young's modulus DIN EN 843-2 E [GPa] 410
Weibull modulus DIN EN 843-5 m 15
Flexural strength, 4-pt bending DIN EN 843-1 σB [MPa] 460
Compressive strength DIN 51104 σD [MPa] >2800
Poisson ratio DIN EN 843-2 ν 0.18
Fracture toughness (SENB) Klc [MPa·m0,5] 5
Coefficient of thermal expansion DIN EN 821-1
25°C - 500°C α [10-6/K] 4.5
500°C - 1000°C α [10-6/K] 6.3
Specific heat at 25°C DIN EN 821-3 cp [J/g K] 0.94
Thermal conductivity at 25°C DIN EN 821-2 λ [W/m K] 36
Thermal stress parameters calculated
R1 = σB·(1-ν) / (α·E) [K] 204
R2 = R1·λ [W/mm] 7
Specific electrical
resistance at 25°C
DIN EN 50359 ρ [Ω cm] 1