General Info
ZIRCAR Refractory Sheet Type RS-A is a tough ceramic fiber reinforced composite material available in standard boards and custom shapes made to customer specifications.
These products are made from Type RS-A Moldable. Type RS-A was developed as an asbestos board replacement for induction coil liners and molten metal transport, and contains no asbestos. Refractory Sheet Type RS-A is ideally suited for a wide range of high temperature, high thermal shock applications.
Type RS-A contains no organic binders and will produce no smoke or odors when heated.
Type RS-A products are available in 3 varieties: Type RS-A1 is dried to constant weight at 100°C(212°F). These products can be remoistened to impart moldablity. Type RS-A2 is fired for 3 hour at 600°C(1112°F) and fully cured. Type RS-A3 is fired, hardened with ZRCI AL-Hard at 5% pickup, and re fired. They are substantially higher in density than other ceramic fiber based moldable derived products.
Properties
| Typical Composition, % | |
| Al2O3 | 90 |
| SiO2 | 10 |
| Color | White |
| Organic Content, % | 0 |
| Specific Heat, BTU/lb°F (J/kg°K) | 0.25(1047) |
| Maximum Use Temp* C(F) | 1450(2642) |
| Thermal Conductivity,** (estimate) | |
| W/m°K(BTU/hr ft2 °F/in) | 0.65(4.5) |
| TYPE |
Type A1 |
Type A2 |
Type A3 |
| Density, gm/cm3(lb/ft3) |
1.6(100) |
1.6(100) |
1.7(105) |
| Porosity, % |
40 |
40 |
38 |
| Modulus of Rupture,** MPa(psi)
at room temperature |
3.4(500) |
3.9(560) |
9.1(1330) |
| Compressive Strength,** MPa(psi) at 10% deflection |
6.9(1000) |
9.7(1400) |
17.2(2500) |
| Hardness, Durometer “D” |
50 |
55 |
70 |
| Pullout Strength | |||
| (lbs on #10 sheet metal screws) |
30 |
50 |
90 |
| Moisture Content, % |
10 |
10 |
2 |
| Linear Shrinkage‡,16 hrs soak at 1200°C(2192°F) |
4 |
0 |
0 |
* 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.
Composition
Refractory Sheet Type RS-A is a tough ceramic fiber reinforced composite material available in standard boards and custom shapes made to customer specifications. It is ideal for applications up to 1450°C (2642°F). Type RS-A products are available in 3 varieties: Type RS-A1 is dried to constant weight at 100°C(212°F). These products can be remoistened to impart moldablity. Type RS-A2 is fired for 3 hour at 600°C(1112°F) and fully cured. Type RS-A3 is fired, hardened with ZIRCAR AL-Hard at 5% pickup, and re fired. They are substantially higher in density than other ceramic fiber based moldable derived products.
- Flexible and Strong
- Fully Machinable
- Non RCF
Instructions
SUGGESTED APPLICATIONS
- Induction Furnace components such as: channel melter components, coil liners, coreless induction components, splash and coil shields.
- Non-ferrous metal handling and transport as: spouts, troughs, and casting tips.
- Brazing separators and fixtures for jewelry-making as well as other industrial applications. The high Al2O3 content makes it resistant to sticking in many environments including molten metals.
- Ideal as high temperature gasketing material.
Download the RS-A Boards and Shapes PDF File
SDS (in PDF format)
Other Information
AVAILABILITY
RS-A Shapes are typically made to customer specification. Please contact ZRCI Sales Office for complete information.