C-510 High-Alumina Refractory AL90
Grade
ISO IEC 60672 Type C-510
AL90 = ≥90 % Al₂O₃ dense corundum-rich refractory
Choose the dense ≥90 % Al₂O₃ corundum-rich quality for service above 1700 °C or where higher strength and slag/alkali resistance are required; firing temperature and price rise significantly.
Values for the AL90 condition
Other C-510 High-Alumina Refractory tempers and conditions
C-510 High-Alumina Refractory is listed in 4 conditions; see the grade overview at C-510 High-Alumina Refractory.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AL90This page ≥90 % Al₂O₃ dense corundum-rich refractory | Choose the dense ≥90 % Al₂O₃ corundum-rich quality for service above 1700 °C or where higher strength and slag/alkali resistance are required; firing temperature and price rise significantly. | — | — | — | 1,100 HV | 5 W/m·K |
AL80Default ~80 % Al₂O₃ fired high-alumina refractory | Default fired ~80 % Al₂O₃ quality: use for most furnace components, sheaths and setter plates where high-temperature capability and cost have to be balanced. | — | — | — | — | 3 W/m·K |
~60 % Al₂O₃ mullite/chamotte-bonded refractory | Pick the most economical ~60 % Al₂O₃ mullite/chamotte-bonded quality for medium-temperature kiln linings and supports; avoid strong alkaline slags and sustained service above 1500 °C. | — | — | — | — | 2 W/m·K |
Lightweight insulating high-alumina | Use the porous lightweight insulating version when low thermal conductivity and low heat storage govern; it tolerates only very low mechanical load and no abrasive gas flow. | — | — | — | — | 0.35 W/m·K |
What is C-510 High-Alumina Refractory AL90?
C-510 High-Alumina Refractory AL90 is C-510 High-Alumina Refractory in the AL90 grade — choose the dense ≥90 % Al₂O₃ corundum-rich quality for service above 1700 °C or where higher strength and slag/alkali resistance are required; firing temperature and price rise significantly. The elastic modulus is 145 GPa (21 Msi). C-510 High-Alumina Refractory AL90 has a density of 3.15 g/cm³ (0.114 lb/in³), lighter than 73% of ceramic grades. It melts at 1,800°C (3,272 °F). AL80 is the default condition FabDigit quotes; AL90 is available on request or by drawing note.
Advantages
- Low embodied carbon — 2.2 kg CO₂/kg, better than 93% of ceramic grades
- High service temperature — 1,750°C (3,182 °F), better than 92% of ceramic grades
- Good corrosion resistance — 90/100, better than 81% of ceramic grades
Limitations
- Hard to polish — 35/100, worse than 93% of ceramic grades
C-510 High-Alumina Refractory AL90 properties
Typical room-temperature values for C-510 High-Alumina Refractory AL90; 14 are specific to this condition. Other listed values are C-510 High-Alumina Refractory reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical3
C-510 High-Alumina Refractory AL90 has a density of 3.15 g/cm³ (0.114 lb/in³), lighter than 73% of ceramic grades. It melts at 1,800°C (3,272 °F).
Mechanical6
The elastic modulus is 145 GPa (21 Msi).
Thermal5
C-510 High-Alumina Refractory AL90 is rated for continuous service to 1,750°C (3,182 °F). It conducts heat at 4.5 W/m·K (2.6 BTU/hr·ft·°F), worse than 64% of ceramic grades. Thermal expansion is 6.8 µm/m·K (3.78 µin/in·°F).
Electrical4
C-510 High-Alumina Refractory AL90 is an electrical insulator with a dielectric strength of 10 kV/mm (254 V/mil) and a resistivity of 1×10¹⁰ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (90/100), better than 81% of ceramic grades.
Sustainability4
Producing a kilogram of C-510 High-Alumina Refractory AL90 takes about 30 MJ of energy and emits 2.2 kg of CO₂ — less than 94% of ceramic grades. Typical recycled content is 10%.
Manufacturability3
C-510 High-Alumina Refractory AL90's machinability is not recommended (4/100, worse than 85% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C-510 High-Alumina Refractory AL90
Is C-510 High-Alumina Refractory easy to machine?
In the green or bisque state, turning, milling and drilling with conventional tooling are practical; leave 2–3 % for firing shrinkage. After firing, only diamond grinding or waterjet cutting is feasible and drilled holes chip at breakout.
Can C-510 High-Alumina Refractory be welded?
Not weldable; join with high-alumina refractory cement, mechanical clamping, or a compliant fit to metal parts that includes an expansion gap.
Can C-510 High-Alumina Refractory be formed, bent or molded?
Dry pressing, isostatic pressing, plastic extrusion or casting are the usual routes, followed by firing at 1450–1800 °C in gas or electric kilns; control heating and cooling rates to prevent thermal cracking.
What surface finishes work on C-510 High-Alumina Refractory?
End faces can be diamond ground and lapped flat; high-alumina or zirconia coatings are applied to seal porosity and improve resistance to slag penetration.
C-510 High-Alumina Refractory chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Al2O3classification basis; typically 60–90 % for the C-510 family | 60 – 92 | 80 |
| Fe2O3impurity; affects hot strength and resistivity | ≤ 1.8 | 0.9 |
| TiO2from the bauxite raw material | ≤ 3.5 | 1.5 |
| CaO+MgOfluxing phase | ≤ 1.5 | 0.5 |
| K2O+Na2Ohigh alkali content lowers refractoriness under load | ≤ 1 | 0.4 |
| SiO2present as mullite and glassy phase | ≥ 6 (balance) | — |
C-510 High-Alumina Refractory AL90 — frequently asked
What is C-510 High-Alumina Refractory AL90 used for?
C-510 High-Alumina Refractory AL90 is typically used for furnace linings, high-temperature insulators, kiln components and thermocouple protection tubes. In short: refractory-grade alumina body; 1650 °C continuous service; furnace-lining workhorse.
Is C-510 High-Alumina Refractory AL90 easy to machine?
Not especially — machinability is rated not recommended (4/100, worse than 85% of ceramic grades). In the green or bisque state, turning, milling and drilling with conventional tooling are practical; leave 2–3 % for firing shrinkage. After firing, only diamond grinding or waterjet cutting is feasible and drilled holes chip at breakout.
Can C-510 High-Alumina Refractory AL90 be welded?
Not weldable; join with high-alumina refractory cement, mechanical clamping, or a compliant fit to metal parts that includes an expansion gap.
What surface finishes work on C-510 High-Alumina Refractory AL90?
End faces can be diamond ground and lapped flat; high-alumina or zirconia coatings are applied to seal porosity and improve resistance to slag penetration.
Can C-510 High-Alumina Refractory AL90 be formed, bent or molded?
Dry pressing, isostatic pressing, plastic extrusion or casting are the usual routes, followed by firing at 1450–1800 °C in gas or electric kilns; control heating and cooling rates to prevent thermal cracking.
What is the maximum service temperature of C-510 High-Alumina Refractory AL90?
C-510 High-Alumina Refractory AL90 is rated for continuous use to about 1,750°C (3,182 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- IEC 60672-1/-2/-3 Ceramic and glass insulating materials — IEC (1997)
- ASM Engineered Materials Handbook Vol.4: Ceramics and Glasses — ASM International (1991)
- Refractories Handbook (Schacht, ed.) — CRC Press (2004)
- High-alumina refractory brick and shapes technical data (2024)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.