Boron Carbide

Boron_CarbideBoron carbide,a black crystal powder,is one of the hardest Man-Made materials,its hardness with Mohs hardness 9.36 and micronscopic hardness 5400-6300kg/mm2 is only near upon diamond,its density is 2.52g/cm3 and melting point at 2450℃,the boron carbide possesses properties of endurance hi/low temperature,no reaction with either acids or alkalis,high grinding efficency,no magnetism.It is a good replacement of diamond.Boron carbide also possesses the specialty 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 transfuse,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-resisting parts,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.

China
JIS R6001-1998
ANSI B74.12-1992
FEPA 42GB-1984 DIN69101-1985
GB/T2481.2-1998
GB/T9258.1-2000
Grit No
d50(um)
Grit No
d50(um)
Grit No
d50(um)
Grit No
d50(um)
Grit No
d50(um)
Sedimentation tube method
Electric resistance method
Sedimentation tube method
Standard Werte der Mlkro-Frelhe
Sedigraph 5000D


P240
58.5±2.0
240
60.0±4.0
57.0±3.0







P280
52.2±2.0
280
52.0±3.0
48.0±3.0





F230
53.0±3.0
P320
46.2±1.5
320
46.0±2.5
40.0±2.5
240
53.5-50
F230
53.0±3.0
50.0±3.0
F240
44.5±2.0
P360
40.5±1.5
360
40.0±2.0
35.0±2.0


F240
44.5±2.0
42.0±2.0


P400
35.0±1.5
400
34.0±2.0
30.0±2.0
280
44-40.5



F280
36.5±1.5
P500
30.2±1.5
500
28.0±2.0
25.0±2.0
320
36-32.5
F280
36.5±1.5
34.5±1.5
F320
29.2±1.5
P600
25.8±1.0
600
24.0±1.5
20.0±1.5
360
28.8-25.8
F320
29.2±1.5
27.7±1.5
F360
22.8±1.5
P800
21.8±1.0
700
21.0±1.3
17.0±1.3
400
23.6-20.6
F360
22.8±1.5
21.6±1.5
F400
17.3±1.0
P1000
18.3±1.0
800
18.0±1.0
14.0±1.0
500
19.7-16.7
F400
17.3±1.0
16.5±1.0
F500
12.8±1.0
P1200
15.3±1.0
1000
15.5±1.0
11.5±1.0
600
16-13
F500
12.8±1.0
12.3±1.0


P1500
12.6±1.0
1200
13.0±1.0
9.5±0.8





F600
9.3±1.0
P2000
10.3±0.8
1500
10.5±1.0
8.0±0.6
800
12.3-9.8
F600
9.3±1.0
9.0±1.0


P2500
8.4±0.5
2000
8.5±0.7
6.7±0.6
1000
9.3-6.8



F800
6.5±1.0


2500
7.0±0.7
5.5±0.5


F800
6.5±1.0
6.3±1.0
F1000
4.5±0.8


3000
5.7±0.5
4.0±0.5
1200
6.5-4.5
F1000
4.5±0.8
4.5±0.8
F1200
3.0±0.5


4000

3.0±0.4


F1200
3.0±0.5
3.1±0.5




6000

2.0±0.4









8000

1.2±0.3







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