Cobalt Grinding Balls

Cobalt Grinding Balls are precision-engineered wear-resistant spheres designed for use in high-impact milling, crushing, and dispersion processes. Known for their exceptional hardness, toughness, and corrosion resistance, these grinding media excel in demanding environments such as mineral processing, powder metallurgy, and advanced ceramics production. Their ability to maintain structural integrity under high pressure and temperature makes them valuable in both wet and dry milling operations. Industries including mining, cement, specialty alloy manufacturing, and advanced materials research utilize cobalt grinding balls for tasks such as comminution of hard ores, homogenization of ceramic slurries, and dispersion of metal or oxide powders. Technologies benefiting from cobalt grinding balls include high-energy ball mills for nanomaterial synthesis, precision dispersion mills for functional coatings, and wear-intensive mixing equipment. Ongoing research explores surface engineering, microstructural optimization, and alloying strategies to enhance wear life and milling efficiency. Their balance of mechanical durability and chemical resilience secures their position as a critical tool in industrial and scientific milling operations.

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Tolerance

Properties

Reference & Citations

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

Tolerances

Pellets

Maximum Lump Size		Nominal

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	27
Crystal structure	Hexagonal close packed
Electronic structure	Ar 3d⁷ 4s²
Valences shown	2, 3
Atomic weight( amu )	58.9332
Thermal neutron absorption cross-section( Barns )	37.5
Photo-electric work function( eV )	5
Atomic radius - Goldschmidt( nm )	0.125
Ionisation potential( No./eV )	2/ 17.06
Ionisation potential( No./eV )	4/ 51.3
Ionisation potential( No./eV )	3/ 33.5
Ionisation potential( No./eV )	1/ 79.5
Ionisation potential( No./eV )	1/ 79.5
Ionisation potential( No./eV )	6/ 102

Mechanical Properties

Element	Value
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.32
Poisson's ratio	0.32
Bulk modulus( GPa )	181.5
Bulk modulus( GPa )	181.5
Tensile modulus( GPa )	211
Tensile modulus( GPa )	211
Hardness - Vickers( kgf mm⁻² )	320
Hardness - Vickers( kgf mm⁻² )	170
Tensile strength( MPa )	1135
Tensile strength( MPa )	760
Yield strength( MPa )	345-485

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	6.34@20°C
Temperature coefficient( K⁻¹ )	0.0066@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	-1.33

Physical Properties

Element	Value
Boiling point( C )	2870
Density( gcm⁻³ )	8.9@20°C

Thermal Properties

Element	Value
Melting point( C )	1495
Latent heat of evaporation( J g⁻¹ )	6490
Latent heat of fusion( J g⁻¹ )	263
Specific heat( J K⁻¹ kg⁻¹ )	456@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	100@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	12.5@0-100°C