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Silicon Carbide Seals

silicon carbide seal Click "specification of Silicon Carbide" for the detail specification table of the silicon carbide seals that CHINATUNGSTEN ONLINE supply.
CHINATUNGSTEN ONLINE can supply customers not only standart graphite seals, but also specialy specifications like the products showing as following:

Silicon Carbide - Is a bluish-black material created by fusing silica and coke. It is in the same family as Ceramic (due to the Silica), but has much better lubrication qualities and is harder. The most common silicon carbide used in a mechanical seal is reaction-bonded silicon carbide. In Chemical applications however, Alpha Sintered Silicon Carbide may be recommended. Alpha Sintered Silicon carbide does however sacrifice the Pressure Velocity ratios due to the lack of un-reacted free carbon. Silicon carbide seal faces have the property of excellent resistant-corrosion, high mechanical strength, high thermal conductivity and good self-lubrication. Silicon carbide seal faces are widely used in many different industries, including spacecraft, machinery, metallurgy, printing and dyeing, foodstuff, pharmaceutical, auto industry and so on. When the silicon carbide seal faces are combined with graphite faces, the friction is the smallest; they can be made into mechanical seals which are able to work in highest working requirements.

Silicon Carbide (SiC) Physical Property
Technical Parameter Unit SiC SiC Sic+C Ssic+C Qssic+C
Hardness

HS

110

115

≥105

≥110

≥100

Porosity Rate

%

<0.3

<0.2

<0.5

<0.5

<5

Density

g/cm3

3.00~3.05

>3.10

2.69-2.90

2.70-3.0

2.65

Compressive Strength

MPa

>2200

>2500

>1400

>1600

>800

Fractural Strength

MPa

>350

>380

>150

>160

>100

Coefficient of Heat Expansion

10-6/oC

4

4.2

3.50

3.00

2.50

Content of Sic

%

≥90

≥98

≥85

≥92

≥90

Free Si

%

≤10

≤1

≤12

/

/

Elastic Modulus

GPa

≥400

≥410

≥350

≥360

≥180

Temperature

oC

1300

1400

1300

1400

1400

silicon carbide seal

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1.Tungsten Carbide
2.Tungsten carbide Balls
3.Tungsten carbide Burrs
4.Tungsten Carbide Inserts
5.Tungsten Carbide Plates


CHINATUNGSTEN ONLINE has been specialized in manufacturing tungsten products, especially cemented carbide products for more than 20 years. If you have any inquires concerning the products in this website, please do not hesitate to e-mail us by : sales@chinatungsten.com

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