High Hardness Granite Measuring Table

Granite mainly composition is augite,Plagioclase,few olivine ,biotite and micro- magnetite,black bright color,structure of precision,through millions of years ageing,uniform texture,good stability,high strength ,high hardness and so on.It keep high precision in heavy load,being used in industry producing and lab measuring commonly.

1.The largest size for production is 3000mm width and 6000mm length
2.We also accept to make any relative process

Physical properties:

Specific gravity:	2970-3070Kg/ m3	Compressive strength:	245-254N/m m2
Water absorption	0.13%	Elastic grinding amount:	1.27-1.47 N/m m2
Coefficient of linear expansion	4.61×10-6 /°C	Shore hardness:	above Hs70

 

Bran granite surface plate accuracy

refer advanced leading countries

standard.flatness tolerance as follows:

grade 000 1X(1+d/1000)um

grade 00 2x(1+d/1000)um

grade 14x(1+d/1000)um

grade 1 8x(1+d/1000)um

(d is the length of the plate's diagonal)