40×40×20mm ZrO2 Zirconia Ceramic Foam Filter for Foundry

Foundrymax – Square 40×40×20mm / Zirconia Ceramic Foam Filter for Foundry Applications

• Material: Zirconia (ZrO₂), max service temperature 1700°C

• Pore Density: Available from 10 to 30 PPI (standard range)

• Dimensions: 40 mm × 40 mm × 20 mm (square)

• Structure: Open‑cell reticulated foam

• Core Functions: Removes non‑metallic inclusions, oxides, slag, and refractory fragments from molten steel and high‑alloy melts; reduces turbulence and gas entrapment

• Primary Applications: Carbon steel, alloy steel, stainless steel, nickel‑based alloys, and other high‑temperature metals

Foundrymax Square 40×40×20mm Zirconia Ceramic Foam Filter for Foundry Applications

Foundrymax offers the 40×40×20mm square zirconia ceramic foam filter, designed for foundries processing steel, stainless steel, and high‑temperature alloys. This small square filter delivers reliable high‑temperature performance in a format suited to smaller gating systems and precision casting applications.

Zirconia – Engineered for High‑Temperature Performance

Zirconia (ZrO₂) is the preferred filter material for steel and high‑alloy casting, rated to 1700°C. At steel pouring temperatures (typically 1550°C–1650°C), zirconia maintains its structural integrity and resists erosion from aggressive slags. Zirconia does not react with or contaminate the melt, preserving alloy chemistry and supporting consistent mechanical properties. 

The 40×40mm footprint offers practical filtration coverage for smaller steel castings, investment casting, and gating systems. 

Available in pore densities from 10 to 30 PPI, this filter can be specified to match the requirements of different alloys and quality standards:

• 10 PPI – for higher flow rates, suitable for larger or heavier sections

• 20 PPI – for balanced filtration and flow

• 30 PPI – for finer filtration, recommended for critical components and superior surface finish

The open‑cell reticulated structure, with porosity of 76–82%, creates tortuous flow paths that intercept non‑metallic inclusions through mechanical sieving and surface adhesion. The result is cleaner metal entering the mould cavity, reducing scrap from inclusion‑related defects and improving mechanical properties.

Why Foundrymax for This Zirconia Filter?

As a direct manufacturer, we produce this 40×40×20 size with consistent pore uniformity and dimensional accuracy. Alternative pore densities (10, 20, 30 PPI) and thickness variations are available upon request. Our technical team can advise on the optimal specification for your specific alloy and casting conditions.

Contact Foundrymax to discuss your foundry filtration requirements or request a sample for evaluation.