These balls can be made from either Alumina Oxide, Zirconia Oxide or Silicon Nitride and have several advantages over their steel equivalents. They're 40% less dense than steel, have a 29% lower thermal expansion (so they hold their shape better when the temperature changes) and are 150% harder. Lightweight, hard and tough, with a low mass, these balls are particularly suited to environments which demand arduous, high speed bearing applications, for example machine tool spindles and vacuum pumps. Because they're so hard this reduces the amount of friction present and thus more of the energy is converted to work, making them more efficient; in some high-speed applications ceramic balls can last 100 times longer than steel. They're also inert (chemically inactive) to most substances, so they offer excellent corrosion resistance. You'll find these used in the automotive and aviation industries (their durability and light weight makes them perfect for use in aircraft braking assemblies for example) and they're often found in many of the items that once used more traditional metal balls, like aerosol paint cans, all manner of joints and slides (like car seats and safety restraints) as well as castors, ball transfer units, quick disconnect couplings and various kinds of fasteners. These balls can be made from either Alumina Oxide, Zirconia Oxide or Silicon Nitride and have several advantages over their steel equivalents. They're 40% less dense than steel, have a 29% lower thermal expansion (so they hold their shape better when the temperature changes) and are 150% harder. Lightweight, hard and tough, with a low mass, these balls are particularly suited to environments which demand arduous, high speed bearing applications, for example machine tool spindles and vacuum pumps. Because they're so hard this reduces the amount of friction present and thus more of the energy is converted to work, making them more efficient; in some high-speed applications ceramic balls can last 100 times longer than steel. They're also inert (chemically inactive) to most substances, so they offer excellent corrosion resistance. You'll find these used in the automotive and aviation industries (their durability and light weight makes them perfect for use in aircraft braking assemblies for example) and they're often found in many of the items that once used more traditional metal balls, like aerosol paint cans, all manner of joints and slides (like car seats and safety restraints) as well as castors, ball transfer units, quick disconnect couplings and various kinds of fasteners. Aluminum Die Casting Auto Parts auto spare parts,precision casting company,Aluminum Die Casting Auto Parts Shenzhen Kangneng Fusheng Die Casting Products Co., Ltd. , https://www.kesdiecast.comMaterial Specifications
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Alumina Oxide
Zirconia Oxide
Silicon Nitride
Composition
99.5% Al2O3Â / 0.5% other
97% ZrO2Â / 3% MgO
87% Si3N4Â / 13% other
Hardness
1700 Hv
80 - 84 Ra
1400 - 1700 Hv
Ultimate Tensile Strength
31,000 psi
60,000 psi
-
Ultimate Compressive Strength
>300,000 psi
285,000 psi
>570,000 psi
Modulus of Elasticity
53 x106Â psi
29 x106Â psi
44-45 x106Â psi
Maximum Working Temperature
1400ºC
2400ºC
1000ºC
Corrosion Resistance
Inert except for hydruofluric and hot concentrated sulphuric acids.
Inert to most substances, not recommended for environments of hydrochloric or strong alkaline solutions.
Inert to most substances.
Description
Benefits
Use
 Material Specifications
Â
Alumina Oxide
Zirconia Oxide
Silicon Nitride
Composition
99.5% Al2O3Â / 0.5% other
97% ZrO2Â / 3% MgO
87% Si3N4Â / 13% other
Hardness
1700 Hv
80 - 84 Ra
1400 - 1700 Hv
Ultimate Tensile Strength
31,000 psi
60,000 psi
-
Ultimate Compressive Strength
>300,000 psi
285,000 psi
>570,000 psi
Modulus of Elasticity
53 x106Â psi
29 x106Â psi
44-45 x106Â psi
Maximum Working Temperature
1400ºC
2400ºC
1000ºC
Corrosion Resistance
Inert except for hydruofluric and hot concentrated sulphuric acids.
Inert to most substances, not recommended for environments of hydrochloric or strong alkaline solutions.
Inert to most substances.
Description
Benefits
Use
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Alumina Oxide Balls/Zirconia Oxide Balls/Silicon Nitride Ceramic Balls
Model NO.: 3.969mm G5 grade
Trademark: OEM
Specification: 3.175mm and above
Origin: Shandong, China
HS Code: 6909110000
Model NO.: 3.969mm G5 grade
Trademark: OEM
Specification: 3.175mm and above
Origin: Shandong, China
HS Code: 6909110000