Shaped Refractories / Dense High Alumina Bricks
AL-42D Dense High Alumina Bricks
AL-42D is the 43% Al₂O₃ grade in Shanker Agencies’ dense high alumina bricks range, rated for continuous service to 1300°C.
AL-42D technical specification
Typical values for AL-42D dense high alumina bricks. Test methods vary by property and product family, so confirm the applicable standard against the manufacturer datasheet before specifying.
| Property | Value |
|---|---|
| Al₂O₃ content | 43% |
| Fe₂O₃ content | 2.0% |
| Bulk density | 2.25 g/cc |
| Apparent porosity | 19% |
| Cold crushing strength | 39 MPa |
| Refractoriness (PCE) | Orton 32 |
| Refractoriness under load (RUL) | 1430°C |
| Max service temperature | 1300°C |
| Typical use | Coke ovens & blast furnaces |
Where AL-42D is used
Is AL-42D right for your application?
- Rated for continuous service up to 1300°C.
- Also meets SK 30, SK 32 requirements. Those are lower duties, so a lighter grade may be the more economical choice.
Compare AL-42D with other grades▾
Compare AL-42D against every grade SAPL stocks in this family.
Swipe to compare grades
| Grade | Al₂O₃ content | Fe₂O₃ content | Bulk density | Apparent porosity | Cold crushing strength | Refractoriness (PCE) | Refractoriness under load (RUL) | Max service temperature | Typical use |
|---|---|---|---|---|---|---|---|---|---|
| AL-42Dthis grade | 43% | 2.0% | 2.25 g/cc | 19% | 39 MPa | Orton 32 | 1430°C | 1300°C | Coke ovens & blast furnaces |
| AL-45D | 45% | 1.5% | 2.30 g/cc | 20% | 44 MPa | Orton 33 | 1470°C | 1300°C | Coke ovens & blast furnaces |
| HA-62D | 62% | 1.2% | 2.55 g/cc | 16% | 64 MPa | - | 1580°C | 1400°C | Blast furnaces, coke ovens, calcination & ceramic kilns |
| HA-70SD | 70% | 1.5% | 2.65 g/cc | 22% | 44 MPa | Orton 37 | 1550°C | 1600°C | Rotary kilns & glass furnaces, reducing atmosphere |
| HA-80SD | 80% | 1.6% | 2.75 g/cc | 19% | 69 MPa | Orton 37 | 1580°C | 1600°C | Refineries, petrochemicals & steel ladles |
Send the drawing, dimensions, application and quantity for AL-42D dense high alumina bricks. Our technical team reviews the requirement and advises on grade and fulfilment route.
Request AL-42D QuoteGrade designations & equivalents▾
How AL-42D is referenced across Indian and export naming conventions.
| SAPL grade code | AL-42D |
| Export SK equivalentNearest SK step, minimum 38% Al₂O₃ | SK 34 |
| Also meetsExceeds these requirements, a lower grade may suit those duties | SK 30, SK 32 |
| Alumina content | 43% Al₂O₃ |
| Measured refractoriness (PCE)This brick’s own cone value, not its SK trade grade | Orton 32 |
| Max service temperature | 1300°C |
Reading an SK code correctly. SK (Seger Kegel) is a cone designation, and each step carries an accepted minimum Al₂O₃ content in trade practice. The dependable way to match an SK enquiry to a grade is that minimum alumina figure, which is how the equivalence above is derived. Note that a brick’s measured PCE and its SK trade grade are two different numbers and will not always agree. Suppliers also differ at the margins, most often around SK 34. When comparing offers, check Al₂O₃ and PCE together rather than the SK code alone.
SK series to dense high alumina bricks reference▾
Standard SK steps with the SAPL grade that meets or exceeds each one. Grades are matched at or above the minimum alumina for the step, so an SK enquiry is never answered with an under-spec material.
Installation notes
- 1Store in dry conditions, protect from moisture and contamination before use
- 2Use high alumina mortar matched to the brick's Al₂O₃ content for jointing
- 3Keep joints thin (1.5–3 mm): dense bricks rely on tight joints to resist penetration
- 4Follow a controlled dry-out and heat-up schedule for the lining
Disclaimer: values are typical and compiled by Shanker Agencies Pvt. Ltd. from standard industry data and published manufacturer specifications. They are indicative, not a guarantee. Confirm the exact grade datasheet before specifying. For a certified datasheet or quotation, contact info@shankeragencies.com or +91 98999 57888.