WAM® 70 CG – Construction Grade Castable

WAM® 70 CGis a high temperature castable blending low cement and ultra low cement technology.  It is comprised primarily of a 70% alumina mullite containing aggregate. The amount of mullite contained in this aggregate is more than the lower alumina containing aggregate present in the WAM® 60 CG. As a result of the increased mullite content and lower cement levels in this product; the material to be suitable for use up to 3200oF. WAM®


Construction Grade castable technology incorporates the latest available technology in regards to particle size distribution, surfactants, and in-situ reactants that promote volume stability at temperature, density, non-reactivity, water demand, working time and placement characteristics. It is an economical choice to the premium grade products when trying to match desired product lifetime to an existing maintenance schedule. The coarse version increases the material abrasion and impact resistance. There is also add on packages for aluminum penetration resistance, alkali resistance, and thermal shock resistance. A fine package is available for patching and  intricate precast shapes.


WAM® 70 CG finds application in several areas as a high temperature, low reactivity thermal protection material. This material is commonly used in areas that undergo increased chemical reactions with the melts or slags in which it comes in contact. This includes furnaces, ladles, and other furniture  for iron and steel foundries and mills. It has been used in copper furnaces and the AL version has been used in all aluminum processing and transport vessels.

Typical Technical Data
WAM® 70 CG                                                                                            
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Classification:Construction Grade Castable
Placement Method:Vibration Casting, Pumping / Shotcreteing
Available Application Packages:NB - No Bauxite
AL - Aluminum Penetration Resistant
C - Coarse Aggregate
F - Fine Aggregate
AR - Alkali Resistant
TSR - Thermal Shock Resistant
Typical Water Requirement (%wt):5.5
Material Required for Estimating (lb/ft3):164
Maximum Recommended Service Temperature (°F):3200

Calculated wt.% Based on Common Oxides

Aluminum Oxide (Al2O3):67.0 %
Silicon Dioxide (SiO2):28.3 %
Titanium Dioxide (TiO2):2.4 %
Iron(III) Oxide (Fe2O3):1.0 %
Calcium Oxide (CaO):1.0 %
Magnesium Oxide (MgO):0.1 %
Combined Alkali Oxide (Na2O + K2O):0.2 %


Modulus of
Rupture (psi)
Cold Crushing
Strength (psi)
Linear Change (%)
After 230166251016,200n/a
After 1500164242013,350-0.2
After 3000n/an/an/a+0.4

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.