Granite Measuring Tool-Granite Surface Plate
Detail Specifications / Descriptions
Physical Properties of "JiNan Black"Granite Rock
Specific Gravity : 2970～3070kg/m3
Compressive Strength: 245～354N/mm2
Elasitic Modulus: 1.27～1.47N/mm2
Linear Expansion Coefficient: 4.61x10^-6/℃
Water Absorptivity: <0.13%
Shore Hardness: Hs70
black granite suiface accuracy
please refer advanced leading
grade 000 1×（1+d/1000） μm
grade00 2×（1+d/1000） μm
grade0 4×（1+d/1000） μm
grade1 8×（1+d/1000） μm
（d is the length of the palate’s diafonal mm）
