SBR RUBBER BALLS
Styrene butadiene copolymer balls, they feature good mechanical properties, excellent abrasion, wear and permanent defomation resistance. They are not suitable in outdoor applications and they feature even low aging resistance.
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Applications
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Special pumps and valves as sealing elements, mixing devices, automotive field.
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Technical name
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Commercial name
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Abbreviation
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|---|---|---|
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Styrene-butadiene
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Buna-S
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SBR
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Physical / mechanical / thermal / electric / magnetic properties
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Property
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Symbol
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U.o.M.
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Type
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Notes
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Values
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|---|---|---|---|---|---|
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Density
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δ
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[g/cm3]
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Physical
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Room temp.
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1.23
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Young's modulus
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E
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[MPa]
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Mechanical
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-
|
6
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Elongation at break
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A
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%
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Mechanical
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Room temp.
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max 700
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Compression set
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-
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%
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Mechanical
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Room temp.
|
25
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Friction coefficient
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µ
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-
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Mechanical
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Room temp.
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0.82
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Coefficient of linear thermal expansion
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α
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[10^-6/ºC]
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Thermal
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(ΔT=0-100°C)
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180
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Thermal conductivity
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λ
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[W/(m·K)]
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Thermal
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Room temp.
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0.17
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Electric resistivity
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ρ
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[Ohm.mm2/m]
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Electric
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-
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> 10^19
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Relative magnetic permeability
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µ
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-
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Magnetic
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Diamagnetic
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<~1
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Technical data
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Property
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Type
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U.o.M.
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Values
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U.o.M.
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Values
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|---|---|---|---|---|---|
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Hardness
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Mechanical
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[Shore A]
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50 - 95
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-
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-
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Ultimate tensile strength
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Mechanical
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[MPa]
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5 - 20
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[psix10^3]
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0.73 - 2.90
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Service temperature
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Thermal
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[ºC]
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-50 / 90
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[ºF]
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-58 / 194
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Range
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Diameters (min/max)
|
U.o.M.
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Diameters (min/max)
|
U.o.M.
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Precision Grade
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|---|---|---|---|---|
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4.750 - 150.000
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[mm]
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3/16 | 5.3/4
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["]
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III
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Corrosion Resistance
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Good resistance against water, fair in contact with alcohols, ketones, glycols, brake fluids, diluted acids and basis. They are not suitable in contact with oils and fat, aliphatic and aromatic hydrocarbons, petroleum products, esters, ethers, oxygen, ozone, strong acids and basis.
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Revision n.2