Granite machine component
Material: Ji Nan Black
Our granite measuring devise and granite mechanical components are made of high quality
Jinan Black granite, high precision, durable in use, stability and corrosion resistance, these
are more and more used in production inspection of the modern industry and such scientific
areas as mechanical aerospace and scientific researches.
Jinan Black granite, high precision, durable in use, stability and corrosion resistance, these
are more and more used in production inspection of the modern industry and such scientific
areas as mechanical aerospace and scientific researches.
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Physical property of Ji Nan Black Granite
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Specific Gravity
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2970-3070KG/ m3
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Compressive strength
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245-254 Mpa
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Elastic Modulus
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30-50 Gpa
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Linear expansion coefficient
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4.61*10-6/℃
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Water absorptivity
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≤0.07
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Shore Hardness
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Above 70Hs
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Characteristics:
1.high precision, reliable stability resistant to deform and guaranteed accuracy under
normal ambient temperature
normal ambient temperature
2.No-rust and anticorrosion
3.Wear resistance, long service life
4.Any cutting or scratching for working surface does not bring about rough edges which might
influence its measuring precision
influence its measuring precision
5.Non magnetization
6.Glossy surface without sluggishness when the workpieces or tools are moving on it