ZIRCAR Ceramics: ASQ

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102.jpg (3709 bytes) Castertip Type ASQ

GENERAL INFORMATION

ZIRCAR Castertip Type ASQ is a rigid, alumina bonded alumina-silica fiber product designed for use on SCAL thin strip casters. Type ASQ is vacuum formed using specially washed "shot-free" fibers and inorganic binders. It exhibits uniform density and consistency throughout the entire product. ASQ is commonly supplied with an oversize pre-shaped leading edge and is easily ground to its final contour directly on the caster rolls. ASQ exhibits low thermal conductivity, good hot strength and is used in the production of pin hole free medical and packaging grades of foil all around the world.

Standard ASQ is offered in nominal 14 pcf density in the form of a sheet. Custom product is available with variations in size, shape and density.

CHARACTERISTICS & PROPERTIES

Typical Composition, %
Al₂O₃	58
SiO₂	42
Color	White
Bulk Density, gm/cc (pcf)	0.19-0.26 (12-16)
Binder	Alumina
Maximum Use Temp.*, °C (°F)	1260 (2300)
Flexural Strength**, MPa (psi) as received	0.46 (66)
after 24 hrs at 760°C (1400°F)	0.50 (73)
after 24 hrs at 1000°C (1832°F)	0.48 (70)
after 24 hrs at 1200°C (2192°F)	0.37 (53)
Compressive Strength** @ 10% compression, MPa (psi) as received	0.11(16)
after 24 hrs at 760°C (1400°F)	0.12 (17)
Loss On Drying, % after 24 hrs at 121°C (250°F)	2
Loss On Ignition, % after 24 hrs at 760°C (1400°F)	3
Linear Shrinkage^‡, %
after 24 hrs at 760°C (1400°F)	2
after 24 hrs at 1000°C (1832°F)	2
after 24 hrs at 1100°C (2012°F)	3
after 24 hrs at 1200°C (2192°F)	5
Thermal Conductivity, ** W/m°K(BTU/ft² °F/in)
600°C (1112°F)	0.11 (.70)
800°C (1472°F)	0.16 (1.20)
1100°C (2012°F)	0.27 (1.70)

*	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.

SUGGESTED APPLICATIONS

Castertips, end dams and baffle boards for continuous casting of aluminum strip.

Launders, distribution boxes, pouring spouts, hot tops and other shapes involving molten metal contact.

Backup thermal insulation in furnaces and thermal process systems operating to high temperatures.

High temperature setters, supports and process fixtures.

Thermal insulation in hot appliances.

MATERIAL SAFETY DATA SHEET

AVAILABILITY
CUSTOM BOARDS AND SHAPES

Custom sizes and shapes are available on request. Boards can be made as small as 1" x 1" x 1/2" and as large as 24" x 49" x 2.5". Disks can be made as small as 1" diameter and 1/2" thick and as large as 24" diameter and 2.5" thick. Cylinders can be made as small as 1/2" Inside Diameter, 1 1/2" Outside Diameter and 1/2" Length and as large as 18" Inside Diameter, 22" Outside Diameter and 24" Length.

Our forming processes, large inventory of custom tooling and state of the art machining techniques allow a wide variety of sizes and shapes to be made. Special geometries such as disks, rings and custom-machined shapes and others can be fabricated. Tight tolerance machining, compositional variations and the application of surface rigidizers and hardening agents are available.

ASQ is commonly produced as a castertip. Castertip variations include:

Sheet stock used in machining tips and baffles, up to 60" long x 24" wide

Pre-shaped blanks with a variety of radii cut along an edge.

Density variations ranging from 10 to 40 pcf density, such as the 20 pcf variety - ASQ-20.

The following results are from a recent study of the effect of density variations on the mechanical properties of ASQ.

Bulk Density, pcf	14.5	16.1	18.2	20.5	28.3	37.9
MOR, psi	85.1	95.7	104.3	131.4	209.5	255.7
Hardness, Duro. A	18.5	22.3	32.5	35.3	50.0	70.0

Please contact us with your special requirements. We are pleased to contact you if you would like more information or want to discuss custom product availability and pricing.

To Order

Custom boards: specify quantity, product type and size. Example: 24ea, ASQ-20, 14in.W x 31.5in.L x 1.0in.T

Custom boards, shapes and preparations: specify quantity, product type and description (by supplying drawings, sketches, written descriptions or material specifications).