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