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Material – Granite

material analysis

Zhonghui Intelligent Manufacturing Group(ZHHIMG) has found and tested a lot of granite in the world to find the best granite material.

Granite Source

Why Choose Granite?
• DIMENSIONAL STABILITY: black granite is a natural aged material formed over millions of years and therefore displays great internal stability.
• THERMAL STABILITY: the linear expansion is much lower than the steel or cast iron ones.
• HARDNESS: comparable to good-quality tempered steel.
• WEAR RESISTANCE: instruments last longer.
• ACCURACY: the flatness of the surfaces is better than the one obtained with traditional materials.
• RESISTANCE TO ACIDS, NON-MAGNETIC ELECTRICAL INSULATION RESISTANCE TO OXIDATION: no corrosion, no maintenance.
• COST: working the granite with state-of-the-art technology prices are lower.
• OVERHAUL: Eventual servicing can be carried out quickly and cheaply.

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Global Main Granite Material

Jinan-Black-Granite

Mountain Tai (Jinan Black Granite)

Pink Granite

Pink Granite (USA)

Indian Black Granite

Indian Black Granite (K10)

Charcoal Black

Charcoal Black (USA)

Black-Granite-600x600

Indian Black Granite (M10)

Academy Black

Academy Black (USA)

African Black Granite

African Black Granite

Sierra White

Sierra White (USA)

Zhangqiu-Black-Granite

Jinan Black Granite II (Zhangqiu Black Granite)

FuJian-Granite

FuJian Granite

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SiChuan Black Granite

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DaLian Grey Granite

Austria Grey Granite

Austria Grey Granite

Blu Lanhelin Granite

Blue Lanhelin Granite

Impala Granite

Impala Granite

China Black Granite

China Black Granite

There are many kinds of granite in the world, and these nine kinds of stone are mainly used now. Because these nine kinds of stones have better physical properties than other granite. Especially Jinan black granite, which is the best granite material we've ever know in precision field. HEXAGON, China AEROSPACE...all choose Black Granite.

Global Main Granite Material Analysis Reports

Material Items Origin Jinan Black Granite Indian Black Granite(k10) South African Granite Impala Granite Pink Granite Zhangqiu Granite Fujian Granite Austria Grey Granite Blue Lanhelin Granite
Jinan,China  India South Africa South Africa America Jinan, China Fujian,China Austria Italy
DENSITY(g/cm3) 2.97-3.07 3.05 2.95 2.93 2.66 2.90 2.9 2.8 2.6-2.8
Water Absorption(%) 0.049 0.02 0.09  0.07 0.07 0.13  0.13 0.11
 0.15
Coefficient of Termal Expansion 10-6/℃
 7.29 6.81 9.10 8.09
 7.13 5.91  5.7 5.69
  5.39
Flexural Strength (MPa) 29 34.1 20.6  19.7 17.3 16.1  16.8  15.3  16.4
Compressive strength(MPa） 290 295 256  216 168 219 232
  206  212
Modulus of Elasticity(MOE)  104mpa  10.6 11.6 10.1 8.9
 8.6 5.33  6.93  6.13 5.88
Poisson's Ratio 0.22 0.27 0.17 0.17
  0.27 0.26  0.29 0.27
  0.26
Shore Hardness 93 99 90  88 92  89 89
 88
Modulus of Rupture(MOR)  (MPA) 17.2      
Volume Resistivity(Ωm) 5~6 x107 5~6 x107 5~6 x107 5~6 x107 5~6 x107 5~6 x107 5~6 x107 5~6 x107 5~6 x107
Resistance Rate(Ω) 9 x 106 9 x 106 9 x 106 9 x 106 9 x 106 9 x 106 9 x 106 9 x 106 9 x 106
Natural Radioactivity                  

1. The material testing experiments were initiated by Zhonghui Intelligent Manufacturing (Jinan) Group Co., Ltd.
2. Six samples of each type of granite were tested, and the test results were averaged.
3. The experimental results are only responsible for the test samples.