Al2TiO5 AT-MUL
Grade
AT-MUL = aluminium titanate / mullite composite
Choose for longer service life at 1000–1300 °C: mullite second phase raises strength and suppresses Al2TiO5 decomposition.
Values for the AT-MUL condition
Other Al2TiO5 tempers and conditions
Al2TiO5 is listed in 4 conditions; see the grade overview at Al2TiO5.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AT-STDDefault Stabilized reaction-sintered aluminium titanate | Default choice for aluminium-casting riser/feed tubes, launders and thermocouple sheaths where thermal shock and non-wetting matter more than strength. | — | — | — | 450 HV | 2 W/m·K |
Fine-grained high-density (hot-pressed / additive-controlled) aluminium… | Pick when higher strength and stiffness are needed and some loss of near-zero CTE from suppressed microcracking is acceptable. | — | — | — | 700 HV | 2 W/m·K |
AT-MULThis page Aluminium titanate / mullite composite | Choose for longer service life at 1000–1300 °C: mullite second phase raises strength and suppresses Al2TiO5 decomposition. | — | — | — | — | 2 W/m·K |
Porous honeycomb / filter body | Extruded high-porosity honeycomb for diesel particulate filters and hot-gas/metal-melt filtration where regeneration thermal shock dominates. | — | — | — | — | 0.8 W/m·K |
What is Al2TiO5 AT-MUL?
Al2TiO5 AT-MUL is Al2TiO5 in the AT-MUL grade — choose for longer service life at 1000–1300 °C: mullite second phase raises strength and suppresses Al2TiO5 decomposition. Al2TiO5 AT-MUL has a tensile strength of 15 MPa (2.18 ksi), weaker than 90% of ceramic grades. Elongation at break is 0% and the elastic modulus is 30 GPa (4.35 Msi). Al2TiO5 AT-MUL has a density of 3 g/cm³ (0.108 lb/in³), lighter than 75% of ceramic grades. It melts at 1,860°C (3,380 °F). AT-STD is the default condition FabDigit quotes; AT-MUL is available on request or by drawing note.
Advantages
- Easy to machine — 20/100, better than 82% of ceramic grades
- High service temperature — 1,500°C (2,732 °F), better than 80% of ceramic grades
- Lightweight — 3 g/cm³ (0.108 lb/in³), better than 75% of ceramic grades
Limitations
- Hard to polish — 25/100, worse than 97% of ceramic grades
- Low stiffness — 30 GPa (4.35 Msi), worse than 87% of ceramic grades
- Poor heat conductor — 2 W/m·K (1.16 BTU/hr·ft·°F), worse than 87% of ceramic grades
Al2TiO5 AT-MUL properties
Typical room-temperature values for Al2TiO5 AT-MUL; 10 are specific to this condition. Other listed values are Al2TiO5 reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical3
Al2TiO5 AT-MUL has a density of 3 g/cm³ (0.108 lb/in³), lighter than 75% of ceramic grades. It melts at 1,860°C (3,380 °F).
Mechanical11
Al2TiO5 AT-MUL has a tensile strength of 15 MPa (2.18 ksi), weaker than 90% of ceramic grades. Elongation at break is 0% and the elastic modulus is 30 GPa (4.35 Msi).
Thermal5
Al2TiO5 AT-MUL is rated for continuous service to 1,500°C (2,732 °F). It conducts heat at 2 W/m·K (1.16 BTU/hr·ft·°F), worse than 87% of ceramic grades. Thermal expansion is 2.5 µm/m·K (1.39 µin/in·°F).
Electrical2
Al2TiO5 AT-MUL has an electrical resistivity of 1×10⁸ Ω·m.
Chemical & Environmental2
Corrosion resistance is excellent (85/100), better than 69% of ceramic grades.
Sustainability4
Producing a kilogram of Al2TiO5 AT-MUL takes about 90 MJ of energy and emits 7 kg of CO₂ — less than 62% of ceramic grades. Typical recycled content is 0%.
Manufacturability3
Al2TiO5 AT-MUL's machinability is poor (20/100, better than 82% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Al2TiO5 AT-MUL
Is Al2TiO5 easy to machine?
Green machining is strongly preferred; fired AT is soft but friable — use diamond grinding with light feed, avoid tapping/threading and sharp internal corners.
Can Al2TiO5 be welded?
Not weldable; join by ceramic cement, glass frit brazing or mechanical clamping with compliant gaskets — allow for near-zero CTE against metal fixtures.
Can Al2TiO5 be formed, bent or molded?
Shaped by slip casting, cold isostatic/dry pressing or extrusion (honeycomb), then reaction-sintered at 1400–1600 °C with MgO/SiO2 stabilizer additions.
What surface finishes work on Al2TiO5?
Left as-fired for melt contact (non-wetting surface); can be glazed or impregnated to seal open porosity, but polishing gains little because of microcracking.
Al2TiO5 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 |
|---|---|---|
| Al2O3stoichiometric Al2TiO5 = 56.1 % Al2O3 | 50 – 60 | 56.1 |
| TiO2stoichiometric balance; excess Al2O3 often used to stabilize | 38 – 46 | 43.9 |
| MgOdecomposition stabilizer (forms MgTi2O5 solid solution) | 0 – 4 | 1.5 |
| SiO2mullite-forming / grain-boundary stabilizer | 0 – 5 | 1.5 |
| ZrO2optional stabilizer / toughener | 0 – 5 | 0 |
| Fe2O3optional stabilizer (pseudobrookite solid solution) | 0 – 3 | 0 |
Al2TiO5 AT-MUL — frequently asked
What is Al2TiO5 AT-MUL used for?
Al2TiO5 AT-MUL is typically used for diesel particulate filters, molten metal handling components, thermal shock resistant parts and kiln furniture. In short: best thermal-shock oxide ceramic; near-zero net expansion; low strength, low modulus.
What is the tensile strength of Al2TiO5 AT-MUL?
Al2TiO5 AT-MUL has a typical tensile strength of 15 MPa (2.18 ksi) — weaker than 90% of ceramic grades. Strength varies by condition: see the 4 listed tempers.
Is Al2TiO5 AT-MUL easy to machine?
Not especially — machinability is rated poor (20/100, better than 82% of ceramic grades). Green machining is strongly preferred; fired AT is soft but friable — use diamond grinding with light feed, avoid tapping/threading and sharp internal corners.
Can Al2TiO5 AT-MUL be welded?
Not weldable; join by ceramic cement, glass frit brazing or mechanical clamping with compliant gaskets — allow for near-zero CTE against metal fixtures.
What surface finishes work on Al2TiO5 AT-MUL?
Left as-fired for melt contact (non-wetting surface); can be glazed or impregnated to seal open porosity, but polishing gains little because of microcracking.
Can Al2TiO5 AT-MUL be formed, bent or molded?
Shaped by slip casting, cold isostatic/dry pressing or extrusion (honeycomb), then reaction-sintered at 1400–1600 °C with MgO/SiO2 stabilizer additions.
What is the maximum service temperature of Al2TiO5 AT-MUL?
Al2TiO5 AT-MUL is rated for continuous use to about 1,500°C (2,732 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- Engineered Materials Handbook Vol. 4: Ceramics and Glasses — ASM International (1991)
- Phase Equilibria Diagrams — Al2O3–TiO2 system — American Ceramic Society / NIST (2014)
- Aluminium titanate (AT) components for non-ferrous casting — CeramTec / Kyocera / Ensinger technical ceramics (2023)
- DuraTrap AT aluminium titanate diesel particulate filters — Corning Incorporated (2020)
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.