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.
Physical property of Ji Nan Black Granite
|
|
Specific Gravity
|
2970-3070KG/ m3
|
Compressive strength
|
245-254 Mpa
|
Elastic Modulus
|
30-50 Gpa
|
Linear expansion coefficient
|
4.61*10-6/℃
|
Water absorptivity
|
≤0.07
|
Shore Hardness
|
Above 70Hs
|
Characteristics:
1.high precision, reliable stability resistant to deform and guaranteed
accuracy under 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
5.Non magnetization
6.Glossy surface without sluggishness when the workpieces or tools are
moving on it