Shaped Refractories / Hot Face Kyanite Insulation Bricks

HFK 140 Hot Face Kyanite Insulation Bricks

HFK 140 is the 37-42% Al₂O₃ grade in Shanker Agencies’ hot face kyanite insulation bricks range, rated for continuous service to 1400°C.

Also known as140% alumina

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Grade

HFK 140

Al₂O₃ content

37-42%

Max service temperature

1400°C

Cold crushing strength

2.5-3.9 MPa (25-40 kg/cm²)

Bulk density

0.95-1.06 g/cc

HFK 140 technical specification

Typical values for HFK 140 hot face kyanite insulation bricks. Test methods vary by property and product family, so confirm the applicable standard against the manufacturer datasheet before specifying.

Property	Value
Al₂O₃ content	37-42%
Fe₂O₃ content	1.7-2.25%
Bulk density	0.95-1.06 g/cc
Apparent porosity	60-66%
Cold crushing strength	2.5-3.9 MPa (25-40 kg/cm²)
Refractoriness (PCE)	Orton 28
Thermal conductivity	0.29-0.42 W/mK @500°C
Permanent linear change	+0.5 to -1.8% @1350°C/5h
Max service temperature	1400°C

Where HFK 140 is used

Direct hot-face lining in furnaces and kilns operating to 1350°C (HFK 135) or 1400°C (HFK 140)Heat treatment, annealing and tempering furnace liningsKiln car decks and superstructure, where low heat storage cuts fuel per cycleBatch and intermittent furnaces with frequent heat-up / cool-down cyclesSingle-layer wall builds where a separate dense working lining is not justifiedMuffle and laboratory furnace linings

Is HFK 140 right for your application?

Rated for continuous service up to 1400°C.

Compare HFK 140 with other grades▾

Compare HFK 140 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)	Thermal conductivity	Permanent linear change	Max service temperature
HFK 135	30% min	2.0% max	1.20 g/cc max	60% min	2.9 MPa min (30 kg/cm²)	Orton 28	0.35 W/mK max @600°C	±1.5% @1350°C/5h	1350°C
HFK 140this grade	37-42%	1.7-2.25%	0.95-1.06 g/cc	60-66%	2.5-3.9 MPa (25-40 kg/cm²)	Orton 28	0.29-0.42 W/mK @500°C	+0.5 to -1.8% @1350°C/5h	1400°C

← HFK 135

Send the drawing, dimensions, application and quantity for HFK 140 hot face kyanite insulation bricks. Our technical team reviews the requirement and advises on grade and fulfilment route.

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Grade designations & equivalents▾

How HFK 140 is referenced across Indian and export naming conventions.

SAPL grade code	HFK 140
Indian trade names	140% alumina
Alumina content	37-42% Al₂O₃
Measured refractoriness (PCE)This brick’s own cone value, not its SK trade grade	Orton 28
Max service temperature	1400°C

Installation notes

1Suitable for direct hot-face duty within the grade rating — no separate dense working lining required
2Use matching insulating mortar; a dense mortar joint will conduct heat straight through the wall
3Cut with a hand saw rather than a hammer and chisel; the structure is porous and chips
4Back up with CFI Group 16 where shell temperature needs to come down further

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.