TRD Specialties, Inc.Chrome Steel Balls, 52100
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Ceramic Balls

Ceramic Balls

Balls manufactured from ceramic materials are extremely resistant to corrosion and abrasion, and offer excellent performance characteristics. TRD Specialties offers a variety of precision ceramic balls, each providing its own unique corrosion and heat resistant qualities.

Alumina Oxide Balls
Alumina oxide ceramic balls have proven performance in wear, heat and corrosive environments as well as in maintaining dimensional stability at temperatures up to 2000 F. Alumina resists oxidation and is tolerant to water, salt solutions, and many chemicals and acids.

Alumina Oxide Balls Properties
Compressive Strength 330,000 psi
Maximum Useful Temperature 3180F
Thermal Conductivity 35.6 W/m C (@ 20C), 6.3W/m C (@ 800C)
Thermal Expansion 4.6 x 10 to the -6th power /F
Electrical Resistivity >10 to the 14th power Ohm/cm (@25C), 2.5 x 10 to the 6th power Ohm/cm (@900C)
Young's Modulus of Elasticity 54 x 10 to the 6th power psi
Hardness 1365 Vickers
Density .139 lbs/inch to the 3rd power



Ruby Sapphire Balls
Ruby Sapphire balls are opaque red in color and frequently used in gauging devices. They are also suited for use in optical and light refractive applications, such as lasers. Ruby Sapphire is resistant to most corrosive material even at very high temperatures. Ruby Sapphires maximum useful temperature is 3250° F.

Ruby Sapphire Ball Properties
Compressive Strength 300,000 psi
Maximum Useful Temperature 3180F
Thermal Conductivity .086 Cal/sec cm C
Thermal Expansion 3.2 x 10 to the -6th power / F
Electrical Resistivity 10 to the 9th power Ohm/cm (@500C), 10 Ohm/cm (@2000C)
Young's Modulus of Elasticity 50 x 10 to the 6th power psi - 55 x 10 to the 6th power psi
Hardness 1570-1800 Vickers
Density .144 lbs/inch to the 3rd power



Silicon Nitride Balls
Silicon Nitride balls are a popular choice for bearing designers and other high precision product applications Long life makes this material very suitable for aviation applications. Silicon Nitride is anti-magnetic and resistant to corrosion by most substances.

Silicon Nitride Ball Properties
Compressive Strength 341,300 psi
Maximum Useful Temperature 2552 F
Thermal Conductivity .07 Cal/sec cm C
Thermal Expansion 1.78 x  10 to the -6th power /F
Electrical Resistivity >10 to the 6th power Ohm/cm (@500C), 10 to the 5th power Ohm/cm (@ 2000C)
Young's Modulus of Elasticity 47 x 10 to the 6th power psi
Hardness 1500 - 2000 Vickers
Density .116 lbs/inch to the 3rd power



Zirconia Balls
In certain applications Zirconia balls operate two to three times longer than metal or carbide. Zirconia balls are inert to corrosive materials with the exception of hydrofluoric acid and hot, concentrated sulfuric acid. Zirconia has a maximum useful temperature of 1800° F.

Zirconia Ball Properties
Compressive Strength 794,837 psi
Maximum Useful Temperature 1800 F
Thermal Conductivity 0.007 Cal/cm, Sec 0
Thermal Expansion 10.9 x 10 to the -6th power / C
Electrical Resistivity 2.2 x 10 to the12th power cm
Young's Modulus of Elasticity 30.6 x 10 to the 6th power, 21700 kgr/mm to the 2nd power
Hardness 1250 kgr/mm to the 2nd power
Density .219 lbs/inch to the 3rd power

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