Unshaped Refractories / Conventional Castables

70% Al₂O₃ Castable Conventional Castables

70% Al₂O₃ Castable is the 68-72% Al₂O₃ grade in Shanker Agencies’ conventional castables range, rated for continuous service to 1550°C.

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Grade

70% Al₂O₃ Castable

Al₂O₃ content

68-72%

Max service temperature

1550°C

CCS after 110°C dry

35 MPa

Bulk density

2.55 g/cc

70% Al₂O₃ Castable technical specification

Typical values for 70% Al₂O₃ Castable conventional castables. Test methods vary by property and product family, so confirm the applicable standard against the manufacturer datasheet before specifying.

Al₂O₃ content

68-72%

Cement content

15-18%

Bulk density

2.55 g/cc

CCS after 110°C dry

35 MPa

CCS after 1200°C

70 MPa

Max service temperature

1550°C

Where 70% Al₂O₃ Castable is used

Backup linings behind LCC / dense brick working liningsBoiler furnace front and rear walls (non-hot-face)Industrial waste incinerator general liningHeat treatment furnace walls and roofSoaking pit backup and chimney bottomBrick-cast hybrid lining where minor repairs and adjustments are neededFoundry ladle backup and trough liningCement preheater bottom and meal chute

Is 70% Al₂O₃ Castable right for your application?

Rated for continuous service up to 1550°C.

Compare 70% Al₂O₃ Castable with other grades▾

Compare 70% Al₂O₃ Castable against every grade SAPL stocks in this family.

Swipe to compare grades

Grade	Al₂O₃ content	Cement content	Bulk density	CCS after 110°C dry	CCS after 1200°C	Max service temperature
40% Al₂O₃ Castable	38-42%	20-25%	2.20 g/cc	20 MPa	35 MPa	1300°C
50% Al₂O₃ Castable	48-52%	18-22%	2.30 g/cc	25 MPa	45 MPa	1400°C
60% Al₂O₃ Castable	58-62%	15-20%	2.45 g/cc	30 MPa	60 MPa	1500°C
70% Al₂O₃ Castablethis grade	68-72%	15-18%	2.55 g/cc	35 MPa	70 MPa	1550°C
Insulating LD-1.5	45-50%	20-25%	1.50 g/cc	-	-	1300°C

← 60% Al₂O₃ Castable Insulating LD-1.5 →

Send the drawing, dimensions, application and quantity for 70% Al₂O₃ Castable conventional castables. Our technical team reviews the requirement and advises on grade and fulfilment route.

Request 70% Al₂O₃ Castable Quote

Grade designations & equivalents▾

How 70% Al₂O₃ Castable is referenced across Indian and export naming conventions.

SAPL grade code	70% Al₂O₃ Castable
Alumina content	68-72% Al₂O₃
Max service temperature	1550°C

Installation notes

1Pre-wet steel formwork to prevent cement-water absorption from the castable mix
2Mix with measured water (8–12% by weight) for 4–6 minutes in a pan or paddle mixer
3Cast in 200–250 mm layers and vibrate using a 25 mm needle vibrator for 20–30 seconds per layer
4Cover with polythene sheet for 24 hrs ambient cure before form removal
5Standard dry-out: 25°C/hr to 110°C, hold 8 hrs; then 30°C/hr to operating temperature
6For thin sections (< 100 mm): consider hand-pack or gunning instead of casting

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.