BORON CARBIDE  
     
 
 
     
  Boron carbide, a black crystal powder, is one of the hardest Man-Made materials, its hardness with Mohs hardness 9.36 and microscopic hardness 5400-6300kg/mm2 is only near upon diamond, its density is 2.52g/cm3 and melting point is 2450℃,The boron carbide possesses properties of endurance hi/low temperature, no reaction with either acids or alkalis, high grinding efficiency, no magnetism. It is a good replacement of diamond.  
     
  Boron carbide also possesses the special properties of light quality, neutron absorbing, semi-conductivity, etc., so it is used for armed forces and nuclear industry.  
     
  Boron carbide is widely applied as follows: boriding refractory, ion transfusion, film layer as well as grinding, polishing, drilling hard metal alloys, jewels, etc. Meanwhile, it is main material for the wear-resisting parts, precise meter-age element, precise spray nozzle, sealed washer, smelting boron steel, boron alloy, etc.  
     
  Boron carbide has showed many better properties of physics and chemistry in the hi-science/technology field.  
     
  SIZE &CHEMICAL COMPOSITION:  
 
Grit No.
Basic Grain (μm)
chemical composition
Total B(%)
Total C(%)
Content B4C%
60#
250
77-80
17-21
96-98
70#
212
80#
180
90#
150
100#
150
120#
106
150#
90-75
180#
75-63
76-79
95-97
220#
63-53
F230
63-53
F240
63-50
F280
50-40
F320
40-28
F360
28-20
F400
20-14
75-78
94-95
F500
14-10
F600
10-7
F800
7-5
74-78
91-94
F1000
5-3.5
F1200
3.5-2.5
60#~150#
250-75
76-81
93-97
46#~120#
350-60
-100mesh
<150
-140mesh
<100
-200mesh
<75
-325mesh
<44
-25μm
<25
-10μm
<10
 
     
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