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Silicon Carbide - Carbide Bonded Isopressed
Carbon bonded isopressed silicon carbide tubes (
SCI
)
are less porous (8%) than Nitride bonded silicon carbide but not as dense as
Oxide or Nitride bonded tubes. They have a maximum service temperature of
2800°F (1550°C).
Composition: 78.2.0% Silicon Carbide (Black, coarse grained Alpha / Beta mix), 18% Silica, 2.1% Sodium Oxide,
1.43% Aluminum Oxide, .44% Iron Oxide.
Note:
Protection tubes are coated with a silicon carbide glaze to reduce open porosity and reactive surface area of the protec-
tion tube. This glaze is used to help prolong the service of the tube.
Part
Inches
Millimeters
Number
O.D. I.D. O.D.
I.D.
Mounting
Figure
SCI12-*
SCI34-*
2
2
.62
.82
50.8
50.8
15.7
20.8
Isopressed
around a steel tube
1/2” NPT
3/4” NPT
2
*
Silicon Carbide - Spout Nozzle
Used for pouring Molten Metals.
Part
Inches
Millimeters
Length
Number
O.D.
I.D.
O.D.
I.D.
Inches
mm
SCP-OBE-VG-4.25
1 3/4
1
44.5
25.4
4.25
107.95
3
Part
Inches
Millimeters
Number
O.D. I.D. O.D.
I.D.
Mounting
Figure
1
SCNCS-*
1 3/4
1
44.5
25.4
Collar, Small
2 1/8” O.D. x 3/8” wide
(Nitride Bonded tube)
1
*
Ceramic Tubes - Silicon Carbide, Small Collar and Silicon Carbide Isopressed
Page 108
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