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Ceramic balls
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· Add:1904, No.11, Jianwai
          SOHO, 39 East 3rd-Ring
          Road, Chao Yang District,
          Beijing, China
· Tel: +86 10 81572284
· Fax: +86 10 81572284
· Email:xlb@xlb.cc
· URL:www.bj-xlbearings.com

 
  Products  
 
BEARING MATERIAL CAPACITY FORUM
capacity
units
GCr15
9Cr18
Si3N4
ZrO2
density
g/cm3
7.8
7.9
3.2
6
thermal expansion α
11
17
3.2
10.5
elastic modulus E
Gpa
208
200
320
210
Poisson's ratioµ
0.3
0.3
0.26
0.3
hardnessHV
800
700
1700
1300
flexural strength   
Mpa
2400
2600
900
1000
compressive strength   
Mpa
2000
3500
tenacity Kc
Nm/cm2
20
25
7
11
thermal conductivity λ
W/mk
30-40
15
3.5
2.5
specific resistance Ω
mm2/m
1
0.75
10(18)
10(15)
specific heat
J/KgK
450
450
800
400
temeperature
°C
120
150
1000
800
anti-corrosion
feebleness
strong
strong
stress cycle time(50%damage probility
10*10(6)
10*10(6)
50*10(6)
50*10(6)
flow contact tiredness invalidation form
peel
peel
peel
peel/rupture
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