How to Select Cerabead Sand for AFS 60 Foundry Work

Match the sand to the molding job

AFS 60 is a practical starting grade for coated sand and shell molding when the casting program uses small steel, iron, or alloy parts. The general particle size range is 45 to 2000 μm. We can customize the particle size distribution when the mold, core, or binder system needs a different grading.

The sand can be used as facing sand, core sand, or the complete molding medium. A foundry making small steel castings may use the grade in coated sand or shell molding. An iron or alloy casting operation can consider the same material when its mold design, binder system, and thermal requirements match the grade.

Picture a shell mold for a small iron component. The grain shape, selected distribution, and binder addition affect how the sand fills the mold and how the mold breaks down after pouring. Send the casting alloy, mold method, and target grading before ordering.

Check chemistry and grain structure

The chemical limits are aluminum oxide at 53% or higher, iron oxide below 4%, titanium oxide below 3%, and silicon dioxide at 37% or lower. The mineralogical composition is mullite plus corundum. Compare these values with the chemistry limits used in your foundry process.

The grain is spherical, with an angular coefficient of no more than 1.1. Spherical grains flow and pack differently from angular sand. They also support separation from cast parts and collapsibility. These characteristics matter when you are planning mold filling, shakeout, and sand recovery around a small casting line.

The material has a pH of 6.6 to 7.3, acid consumption below 1 ml/50 g, and loss on ignition below 0.1%. Include the binder system and any internal chemistry limits in your purchasing specification so the comparison covers the complete molding process.

Use thermal values to judge process fit

Refractoriness is at least 1800°C. Thermal expansion from room temperature to 1200°C is 4.5 to 6.5 × 10⁻⁶/K. These values deserve attention when casting temperature, mold geometry, and dimensional accuracy are part of the selection decision.

Lower thermal expansion can reduce dimensional change during heating, while lower thermal conductivity can contribute to mold performance. For a steel, iron, or alloy casting, compare these properties with the part geometry, wall thickness, and defect history of your mold. The sand grade still needs to work with your complete mold and binder design.

The product can be used across foundry applications with different pouring temperatures and binder systems, but the correct choice depends on the alloy, mold method, grading, and process controls. We can also supply it for use as recycled media in a molding system. Plan how the sand will be introduced, separated, and returned to circulation before fixing the order specification.

Compare density, resin demand, and handling

Bulk density is 1.45 to 1.6 g/cm³. The material also has lower true specific gravity and specific surface area than traditional foundry sand. These properties affect calculations for mold filling, sand movement, and binder demand.

Our sintered ceramic sand can require 30 to 50% less resin. Use that range as a factor for process evaluation, not as a fixed addition rate for every mold. The suitable quantity depends on the selected distribution, binder, core or mold design, and production controls.

The spherical grain supports separation and collapsibility. In a shell molding line, review those characteristics together with part geometry and the cleaning method. The right thermal values alone do not determine whether the sand fits your complete production setup.

Check the AFS 60 sieve distribution

The available AFS 60 distribution includes sieve fractions from 850 μm through 53 μm and pan. Listed AFS values include 55±3, 65±3, and 70±5 for different distributions. The table includes mesh points at 20, 30, 40, 50, 70, 100, 140, 200, and 270, followed by pan.

Use the distribution that matches your mold and core design instead of treating the AFS label as a complete process specification. If your line needs another grading, send the target sieve distribution. We can customize the particle size distribution for your molding requirement.

Decide whether this product fits

Choose our sintered ceramic sand when you need a spherical mullite and corundum material for coated sand or shell molding involving small steel, iron, or alloy castings. It also fits buyers who need one sand for facing, cores, or a complete molding system and want to assess thermal expansion, density, chemistry, and resin demand together.

Choose a customized distribution when your mold or core design does not match the listed AFS 60 options. Send the current sand grade, target sieve distribution, binder system, casting alloy, mold method, and expected quantity so we can prepare a process-specific quotation.

Questions buyers still ask

Prepare the right Cerabead sand request

Our AFS 60 sintered ceramic sand fits coated sand and shell molding for small steel, iron, and alloy castings when its distribution and process properties match your mold design. Send the casting alloy, mold or core method, current and target sieve distributions, binder system, circulation plan, and expected quantity with your quotation request.