Origin	China
Model Number	AP-17H
Brand Name	Tongkai
Abrasive Grain Sizes	P12-P2500
Material	Brown Aluminum Oxide
Usage	for Coated Abrasive

This type of Brown Fused Aluminium grain is made from Ap-17, it is calcined at 1000oC-1300oC, the grit inside crack will be well repaired after heating, the toughness also will be improved after heating. Then the grits will be well washed and carefully sieving again to kicked off the needle and flake shape . It is used for making high quality Coated Abrasives Products like abrasive waterproof paper, sanding cloth, sanding belt, flap wheel and so on.
  
 
  Typical Chemical Analysis  
 
Al2O3  Fe2O3 TiO2  SiO2  CaO   MgO
95.68% 0.08% 2.45% 0.67% 0.20% 0.18%
 
 
  Physical Properties  
 
Color                   Blue
Shape                   Sharp
Crystal Form            Alpha-alumina trigonal system
True Specific Gravity   3.96 g/cm3
Hardness                2090 Knoop scale; 9.0 Mohs scale
Melting Temperature     About 2050 centi-degree
Magnetic Material       0.0076%
Hydrophile              124mm
Cleanness               24ppm
Toughness               80.26
 
 
  Bulk Density Test Value (g/cm3)  
 
Grit No P12  P16  P20  P24  P30  P36  P40  P50
B.D     1.66 1.89 1.86 1.82 1.79 1.77 1.75 1.93
Grit No P60  P80  P100 P120 P150 P180 P220  
B.D     1.73 1.69 1.64 1.61 1.59 1.58 1.56  
 
 
  Grit Size Available (P)  
 
12 16 20 24 30 36 40 50 60 80 100 120 150 180 220
240 280 320 360 400 500 600 800 1000 1200 1500 1800 2000 2500  
 
 
  Particle Size Distribution (PSD)  
 
According to FEPA – Standard 43-1984 R 1993
 
 
  Packing Way Selection  
 
a. In 25kg plastic woven bags.
b. In 1000kg big bag.
c. 40 x 25kg plastic woven bags in one big bag.
d. 40 x 25kg plastic woven bags on pallet.
e. 40 x 25kg paper bags on pallet.
f. According to client’s special requirement.