REFRACTORY SHEET TYPE RSLE-57

(PDF VERSION)

GENERAL INFORMATION

ZIRCAR Refractory Sheet Type RSLE-57 is a low expansion high strength reinforced silica matrix composite . This remarkable material was designed for use as a high strength insulator in induction hot press applications w.

 RSLE-57's very low thermal expansion coefficient and high hot strength combine to give it thermal shock resistance not found in other structural ceramic matrix composite materials. 

RSLE-57's exhibits a very low coefficient of expansion 0.3 x 10-6 C  which provides remarkable resistance to the thermal shock up to 1200C (2192F) in an oxidizing atmosphere and permits its use with rapid variation in temperature in that zone. Beyond 1200C (2192F) it transforms into a crystalline structure and becomes brittle. If the exceeded temperature is only localized, the material still  retains its original high strength properties.

RSLE-57 also exhibits exceptional non-wetting properties when used in contact with molten aluminum making it useful in numerous molten aluminum contact applications.

RSLE-57 is 100% organic free and contains no refractory ceramic fiber. It is readily machined to precision tolerances with conventional tooling.

Other unique properties of RSLE-57 are:

  • A low thermal conductivity.

  • An excellent electrical insulation.

  • A high chemical purity.

  • An excellent resistance to corrosion (from molten metal and glass)

 

PROPERTIES & CHARACTERISTICS

Thermal Expansion Coeff.

 

    Room Temp. to 800C(1472F)

0.3 x 10-6/C

Nominal Composition, wt%

 

         SiO2

99.7

         Other Oxides

<0.3

         Organics

0

Density, g/cc(pcf)

2.1(90)

Porosity, %

31

Color

White

Hardness, Durometer "D"

87

Charpy Impact Strength, ft-lb

0.8

Compressive Strength**, MPa(psi)

 

         at 2.7% consolidation

48(7000)

Modulus of Rupture**, MPa(psi)

30(4300)

Thermal Conductivity** ASTM C-1113

    W/mK(BTU/hr ft F/in)

 

        200C(392F)

0.55(3.8)

        400C(752F)

0.64(4.4)

        600C(1112F)

0.61(4.2)

        800C(1472F)

0.67(4.6)

        1000C(1832F)

0.75(5.2)

Volume Resistivity, ohm-cm

         ASTM D-257-93

7.5 x 109

Dielectric Strength, volts/mil

         ASTM D-149-95

43

Linear Shrinkage, %

Length

Width

Thickness

         24hrs @800C(1472F)

0.1

0.1

0

         24hrs @ 1100C(2012F)

4.9

4.9

7.9

* Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences.
** Properties expressed parallel to thickness.
Properties expressed perpendicular to thickness.

APPLICATION INFORMATION

MACHINING GUIDELINES
ZIRCAR Refractory Sheet Type RSLE-57 exhibits a uniformly bound fine-pore structure.  It can be machined to precision dimensional tolerances with conventional carbide tooling following the guidelines outlined below:

Cutting Tool

Rotation Speed

Feed Rate

Circular Saw Blade, Carbide tipped, 10" diam. 24 teeth

3450

15-20 ft/min

4 Fluted Carbide End Mill

1000-2000

15-20 ft/min

AVAILABILITY

Item # Description
HM01 RSLE-57 Boards, 610mm X 915mm X 3mm
HM02 RSLE-57 Boards, 610mm X 915mm X 6mm
HM03 RSLE-57 Boards, 610mm X 915mm X 8mm
HM04 RSLE-57 Boards, 610mm X 915mm X 10mm
HM05 RSLE-57 Boards, 610mm X 915mm X 12mm
HM06 RSLE-57 Boards, 610mm X 915mm X 16mm
HM07 RSLE-57 Boards, 610mm X 915mm X 20mm
HM08 RSLE-57 Boards, 610mm X 915mm X 30mm
HM09 RSLE-57 Boards, 610mm X 915mm X 50mm
HS01 RSLE-57 Boards, 24" X 36" X 1/4"
HS02 RSLE-57 Boards, 24" X 36" X 3/8"
HS03 RSLE-57 Boards, 24" X 36" X 1/2"
HS04 RSLE-57 Boards, 24" X 36" X 5/8"
HS05 RSLE-57 Boards, 24" X 36" X 3/4"
HS06 RSLE-57 Boards, 24" X 36" X 1"
HS07 RSLE-57 Boards, 24" X 36" X 1 1/2"
HS08 RSLE-57 Boards, 24" X 36" X 2"
HS09 RSLE-57 Boards, 24" X 36" X 3"
HS12 RSLE-57 Boards, 24" X 36" X 1/8"
HS20 RSLE-57 Boards, 36" X 48" X 1/4"
HS21 RSLE-57 Boards, 36" X 48" X 3/8"
HS22 RSLE-57 Boards, 36" X 48" X 1/2"
HS23 RSLE-57 Boards, 36" X 48" X 5/8"
HS24 RSLE-57 Boards, 36" X 48" X 3/4"
HS25 RSLE-57 Boards, 36" X 48" X 1"
HS26 RSLE-57 Boards, 36" X 48" X 1 1/2"
HS27 RSLE-57 Boards, 36" X 48" X 2"

PRICES ARE SUBJECT TO CHANGE WITHOUT NOTIFICATION AND ARE SUBJECT TO ZIRCAR REFRACTORY COMPOSITES, INC. TERMS AND CONDITIONS. ALL PRICES ARE F.O.B. FLORIDA, NY AND ARE IN U.S. DOLLARS

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ZIRCAR REFRACTORY COMPOSITES, INC.
P.O. BOX 489
FLORIDA, NEW YORK 10921
TEL: 845-651-2200, FAX: 845-651-1515

email: sales@zircarchina.com

This information, which is subject to change, is offered solely for your consideration and should not be taken as a warranty or representation for which we assume legal responsibility. It is not to be understood as permission or recommendation to practice a patented invention without a license and the user should determine whether relevant patents exist.

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