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WA799
Ceramic washer

  Appearance   

Washer type

Collar type

Flange type

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WA799 –
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Ceramics (Alumina 95)
Ceramics in abrasion resistance, heat resistance is very good, compared with ordinary steel has greater bending length, less elastic changes, in the chemicalis a very stable. Although there are easily broken, poor processability disadvantages, but lightweight hard, high-temperature heat resistance and excellent insulating properties, from precision machinery to vacuummachines are widely used. Due to the high purity alumina, when used at high temperatures, more volatile impurities can be suppressed and the slide abrasion resistance sre excellent too.

Feature distinguish

Unit

Alumina 99

Alumina 95

Zirconia

Steel S45C

Insulation breakdownstrength

KV/mm

18

16

15

Volume resistivity

Ω-cm

>1012

>1012

>1012

Bending strength

KN/cm2

>35

>29

>110

Compressive strength

KN/cm2

300

250

250

Expansion

1/

8X10-6

7.8X10-6

10X10-6

13.6

Thermal conductivity

W/m.K

31

22

3

52

Heat resistance

1500

1400

1500

Water absorption

%

0

0

0

0

Proportion

g/cm5

3.85

3.6

5.9

7.8

Hardness

HV

1700

1600

1400

130

Main material

A1203(>99%)

A1203(>95%)

ZrO2(>94%)

S45C

Reference:Table of information is the average value of the material.
It is the frangible material, please be careful.

            

 Washer type A 

 Collar type

 Flange type F 

 

 

 

 

 

 

d

L

D

 

d

L

Designation

1mm

D

 

d

L

Designation

1mm

D

H

3

3

10

 

3

5~50

6

 

3

1015

6

10

4

3

12

 

4

5~50

8

 

4

1015

8

12

5

3

15

 

5

5~50

10

 

5

1015

10

15

6

3

20

 

6

5~50

10

 

6

1015

10

20

8

3

25

 

8

5~50

12

 

8

101520

12

25

10

3

30

 

10

5~50

14

 

10

101520

14

30