Products | Boron Carbide

Electro Abrasives manufactures Boron Carbide to the finest powder, in custom sizes to meet all our customers needs. It is manufactured by a team of professionals dedicated to provide our customers the best quality, service, and support.

What is Boron Carbide?

Boron Carbide is one of the hardest man made materials available. Above 1300°C, it is even harder than diamond and cubic boron nitride. It has a 4-point flexural strength of 50,000-70,000 psi and a compressive strength of 414,000 psi, depending on density. Boron Carbide also has a low thermal conductivity (29-67 W/mK) and has electrical resistivity ranging from 0.1 - 10 ohm-cm. With its strength to weight ratio and low thermal conductivity, it is ideal for a wide variety of applications.

Applications

Aerospace
Armor
Blasting Nozzles
Ceramic Composites
Honing Stones
Lapping
Metal Matrix Composites
Nuclear Technology
Refractory Shapes, Cements
Tool & Die Fabrication
Ultra-sonic Machining

Physical and Chemical Composition

Atomic Properties
Crystal structure	Rhombohedral
Molecular Weight	55.3 gm/mole
Heat of Formation ΔH°₂₉₈	-13.8 kcal/mol
Specific Gravity	2.54 gm/cc
Specific Heat	12.5 cal/mol°C
Lattice Energy	6.5 cal/mol°C
Lattice Constant	a_o = 5.60, c_o = 12.10
Neutron Cross Section	600 Barns
Oxidation Temperature	932°F (500°C)
Particle Shape	Blocky, Angular
Color	Black, sooty when powdered
Mechanical Properties
Knoop Hardness (100 gm load)	3200
Mohs Hardness	9.3+
Bending Strength	30....50 kg/mm^-2
Compressive Strength	200...300 kg/mm^-2
Young's Modulus	45,000 kg/mm^-2
Thermal & Electrical Properties
Melting Point	2450°C
Boiling Point	3500°C
Thermal Expansion	5 x 10^-6/°C
Thermal Conductivity 25°	.07...0.16 cal/cm-sec°C
Electrical Resistivity 25°	.01...10 ω-cm
Infrared Absorption Bands	9.5; 12.5 µ
EMF	80 µ . V ./°C
Typical Chemical Analysis
Total Boron	77.5%
Total Carbon	21.5%
Total Iron	0.2%
Total B+C	98%

Grit Sizes Available

ANSI/ISO Grit Sizes:	#24, 36, 46, 60, 80, 90, 100, 120, 150, 180, 220, 240, 280
FEPA Grits (Water classified)	320, 360, 400, 500, 600, 800, 1000, 1200
Ceramic Grades (Air classified)	-200, -325, -400, 10/F micron, 2.5 micron, 0.7 micron.

Electro Abrasives manufactures Boron Carbide at our state-of-the-art, water classified, United States Headquarters in Buffalo, New York. All chemistry and sizing are controlled to meet exact customer requirements. All Boron Carbide manufactured at Electro meets or exceeds ISO, FEPA, and JIS Standards for product quality.

The information contained in this data sheet has been determined through the application of accepted engineering practice and is believed to be reliable. Since the conditions of application and use of our products are beyond our control, no warranty is expressed or implied regarding accuracy of the information, the test results to be obtained from the use of the product, or that such use will not infringe on any patent. This information is furnished with the express condition that you will make your own tests to determine the suitability of the product for your particular use.

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