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Shaped Refractories / Insulating Fire Bricks

IFB-25 Insulating Fire Bricks

IFB-25 is the 51.7% Al₂O₃ grade in Shanker Agencies’ insulating fire bricks range, rated for continuous service to 1350°C.

Also known asIFB-2525% alumina
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IFB-25 grade insulating fire bricks supplied by Shanker Agencies
Grade
IFB-25
Al₂O₃ content
51.7%
Max service temperature
1350°C
Cold crushing strength
2.5 MPa
Bulk density
0.80 g/cc

IFB-25 technical specification

Typical values for IFB-25 insulating fire bricks. Test methods vary by property and product family, so confirm the applicable standard against the manufacturer datasheet before specifying.

Al₂O₃ content
51.7%
Bulk density
0.80 g/cc
Thermal conductivity
0.22 W/mK
Cold crushing strength
2.5 MPa
Max service temperature
1350°C

Where IFB-25 is used

High-temperature kiln hot face & backup lining (ceramic, metallurgical)General backup insulation behind a dense working liningPrimary reformer & hydrogen transfer line backup (fertiliser, petrochemical)Secondary reformer cold faceBlast furnace stovesHigh-temperature air pre-heaters (power generation)Heat treatment furnace linings & soaking pits backup

Is IFB-25 right for your application?

  • Rated for continuous service up to 1350°C.
Compare IFB-25 with other grades▾

Compare IFB-25 against every grade SAPL stocks in this family.

Swipe to compare grades

GradeAl₂O₃ contentBulk densityThermal conductivityCold crushing strengthMax service temperature
IFB-2337.2%0.55 g/cc0.17 W/mK1.2 MPa1260°C
IFB-25this grade51.7%0.80 g/cc0.22 W/mK2.5 MPa1350°C
IFB-2657.3%0.86 g/cc0.23 W/mK1.8 MPa1400°C
IFB-2867.2%0.88 g/cc0.30 W/mK2.5 MPa1540°C
IFB-2957.5%1.05 g/cc0.33 W/mK3.9 MPa1550°C
IFB-3073.6%1.12 g/cc0.60 W/mK4.9 MPa1650°C
IFB-3274.2%1.28 g/cc0.59 W/mK4.9 MPa1750°C
IFB-B20191.1%1.40 g/cc1.38 W/mK12.7 MPa1800°C
IFB-B10198.5%1.45 g/cc1.43 W/mK7.4 MPa1850°C
← IFB-23IFB-26 →

Send the drawing, dimensions, application and quantity for IFB-25 insulating fire bricks. Our technical team reviews the requirement and advises on grade and fulfilment route.

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Grade designations & equivalents▾

How IFB-25 is referenced across Indian and export naming conventions.

SAPL grade codeIFB-25
Indian trade names25% alumina
Alumina content51.7% Al₂O₃
Max service temperature1350°C

Installation notes

  1. 1Handle with care, lower crushing strength than dense bricks
  2. 2Use lightweight insulating mortar matched to grade (e.g. CUMIBOND LK FX, LK 65, LM 36 or LA-series for CUMILAG grades)
  3. 3Never expose directly to liquid metal or slag, always use with working lining
  4. 4Dry-out schedule: ambient to 200°C at 10°C/hr, hold 4 hrs, then proceed slowly

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.