WAM® 20 SP LC – Spinel Bonded Low Cement Castable

WAM® 20 SP LC is a low cement castable which also contains preformed spinel and is suitable for use up to 3300oF. The elongated structure of spinel combined with its thermal behavior make it ideal for use in thermally cyclic environments. The orientation of the mineral provides for excellent impact resistance and overall strength. Spinel is also resistant to chemical attack by many common slags particular to the steel industry.



WAM® 20 SP LC finds application in several areas related to steel production.  This includes most areas within a ladle. It also has application as precast parts for use in the ladle such as impact pads. It is available in a coarse version which increases the material abrasion and impact resistance.

Typical Technical Data
WAM® 20 SP LC                                                                                     PDF Download

Classification:Low Cement Castable
Placement Method:Vibration Casting, Pumping / Shotcreteing
Available Application Packages:C - Coarse Aggregate
F - Fine Aggregate
Typical Water Requirement (%wt):4.5
Material Required for Estimating (lb/ft3):192
Maximum Recommended Service Temperature (°F):3300

Calculated wt.% Based on Common Oxides

Aluminum Oxide (Al2O3):92.9 %
Silicon Dioxide (SiO2):0.1 %
Titanium Dioxide (TiO2):<0.1 %
Iron(III) Oxide (Fe2O3):0.1 %
Calcium Oxide (CaO):1.6 %
Magnesium Oxide (MgO):5.0 %
Combined Alkali Oxide (Na2O + K2O):0.2 %


Modulus of
Rupture (psi)
Cold Crushing
Strength (psi)
Linear Change (%)
After 230194154010,250n/a
After 15001929207,140-0.1
After 3000n/a2130 (at 2730°F)n/a-0.2

Additional technical data may be available. Please contact your sales representative for more information.
Data on this table represent typical properties and cannot be used for specification purposes.