P-33
High Silicia core type with intermediate particle size distribution and excellent high temperature stability. Used for DS and SX applications where there are blind passages and core leachability is a concern.
Major Chemistry
| Name | Formula | Typical % |
|---|---|---|
| Silica | Sio2 | 96.0 |
| Zircon | ZrSiO4 | 1.5 |
| Alumina | Al2O3 | 1.5 |
| Other | -- | 1.0 |
Trace Element Analysis
| Element | Symbol | Typical ppm |
|---|---|---|
| Iron | Fe | <900 |
| Bismuth | Bi | <0.2 |
| Lead | Pb |
<1.0 |
| Silver | Ag | <10.0 |
| Antimony | Sb | <5.0 |
| Tin | Sn | <1.0 |
| Zinc | Zn |
<50.0 |
Cristobalite Content Range
| Property | Typical % |
|---|---|
| After Fire | 8.0 |
| After 30 minutes @1530°C | 57.0 |
Process Shrinkage (Mold to Fired)
| Property | Typical % |
|---|---|
| Length | 1.25 |
| Chord (width) | 1.50 |
Modulus of Rupture
| Property | Typical p.s.i. |
|---|---|
| @RT | 2000 |
| @RT after 1 hour @1530°C | 670 |
| @1457°C | 5160 |
Thermal Expansion
| Property | Typical |
|---|---|
| @1000°C (x10-6/°C) | 1.25 |
Physical Properties
| Property | Typical |
|---|---|
| Bulk Density | 1.60 g/cc |
| Apparent Density | 2.30 g/cc |
| Porosity | 30.0% |
| Absorption | 19.0% |
Core - Metal Reaction
Compatible with most DS and SX alloys:
Leachability
- 30% boiling KOH
- 30 grams sample
- 15 minutes
- 100% leached
Hot MOR
Heat bars @ 300ºC/hour to 1550ºC. Hold for 1 hour. Cool @ 15ºC/minute to:
| Temperatures | MOR |
|---|---|
| 1250°C | 5411 p.s.i. |
Creep Test
RT to 1550°C @ 300°C/hour. Hold for 1 hour. Cool at 600°C/hour. Test bar dimensions: L-6", C/W -1/2", P-1/4"
| Pressure (p.s.i.) | Deflection (inches) |
|---|---|
| 150 | 0.540 |
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as they become available.
