black granite Material:Ji Nan Black A maximum of 6000x3500x600mm
Specific granvity:2970-3070kg/m^3 Compression strength :245-254N/mm^2 Elastic modulus:1.27-1.47 N/mm^2 Shore hardness :>Hs70
physical properties of JiNan Black :Specific granvity:2970-3070kg/m^3
Compression strength :245-254N/mm^2
Elastic modulus:1.27-1.47 N/mm^2
Linear expansion coefficient:0.0000461%(4.61*10^-6)
Water absorbtivity<0.13%
Shore hardness :above Hs 70
Granite measuring tools have the following characteristics
1. high precision reliable stability resistance to deform and guaranteed accuracy under normal ambient temperature.
2. No-rust and anticorrosion
3. wear resistance long service life
4. any working surface cutting or scratching dose not bring about rough edgeswhich might influence its measuring presicion.
5. nonmagnetization.
6. gloosy surface without sluggishness when the workplaces or tools are moving on it
marble flat scale
