Product Features

Built exclusively for steel‑casting environments, our high‑silica fiberglass filter mesh is manufactured from yarn with ≥96 % SiO₂ content.

The leno‑locked weave is the core feature: yarns interlock rather than simply lying side‑by‑side. Under the violent thermal shock of pouring molten steel, the fabric stays dimensionally stable. It will not shift, expand or unravel.

After impregnation with high‑temperature refractory resin followed by thermal curing, the material achieves two critical characteristics: extremely low gas evolution and strong resistance to fibre shedding.

Softening point reaches 1700 °C, reliably coping with transient pouring temperatures of 1450 °C‑1620 °C.

Functions

1. Filtration function: Physically retains slag, oxide scale and fine non‑metallic inclusions carried by molten steel before the liquid metal enters the mould cavity. Impurities are trapped on or within the mesh structure.

2. Flow‑conditioning function: Breaks up violent turbulent flow inside the gating system. It calms molten‑steel flow and promotes steady, laminar mould filling. Less turbulence means reduced re‑oxidation of the steel stream.

3. Defect‑reduction function: By filtering and stabilising flow, it directly suppresses the formation of slag‑inclusion defects, porosity and pin‑holes on steel castings.

Applications

Designed for small‑to‑medium carbon‑steel and low‑alloy‑steel castings.

Install the mesh in sprue cups or within the gating system.

Suitable for general‑engineering steel parts, valve‑body castings, pump‑component castings and other medium‑complexity steel‑casting workpieces.

Mesh Aperture Options

● 1.5 mm × 1.5 mm

For high‑spec thin‑wall steel castings. Catches fine slag and micro‑inclusions where metallurgical standards are stringent.

● 2.0 mm × 2.0 mm

Balances flow rate and filtration performance. The go‑to option for most medium‑wall carbon‑steel and low‑alloy‑steel jobs.

● 2.5 mm × 2.5 mm

Higher flow throughput. Suited for moderately heavy‑section steel castings with limited slag formation.

Available forms: standard sheets, laser‑cut circles and pre‑formed filter caps to fit various sprue‑cup designs. Custom dimensions are acceptable.

Practical Usage Guidance:

This mesh is recommended exclusively for small‑to‑medium carbon‑steel and low‑alloy‑steel castings. When fitted within your gating system, it intercepts in‑stream impurities, lowers scrap rates related to slag‑induced defects and delivers more consistent casting quality.

Why Choose Our High‑Silica Fiberglass Mesh for Steel Casting

Many foundries still try ordinary fiberglass mesh for steel pouring, which often frays, sheds fibres or releases large volumes of gas. These failures directly lead to high scrap rates for steel parts.

Our high‑silica grade addresses those exact risks:

● High‑silica base material delivers far superior high‑temperature performance compared with standard‑grade fiberglass. It survives steel‑pouring thermal shocks without structural collapse. 

● Leno‑locked weave prevents fibre wash‑out when fast‑flowing molten steel rushes across the mesh surface. No loose fibres get washed into your casting. 

● Low‑gas‑evolution resin system minimises gas‑related porosity, a major headache in steel‑casting metallurgy. 

● Multiple aperture choices (1.5 mm, 2.0 mm, 2.5 mm) let you match filtration efficiency and flow speed to your specific steel‑casting process. 

● Flat sheets, circles and pre‑formed filter‑cap options simplify installation on‑site in your foundry. 

● Field‑proven by steel foundries worldwide, with stable repeat‑order performance, confirming consistent batch‑to‑batch quality.

High Silica Fiberglass Filter Mesh VS Zirconia Ceramic Foam Filter

Important note:

● Zirconia ceramic foam filters represent the premium‑grade solution for steel casting. 

● They deliver superior depth‑filtration performance, outstanding high‑temperature resistance up to 1760 °C, and are the preferred option for large‑size, heavy‑section, high‑critical‑value steel castings, stainless‑steel and super‑alloy components.

Nevertheless, high‑silica fiberglass filter mesh remains a practical, widely‑adopted alternative for small‑to‑medium carbon‑steel & low‑alloy‑steel production, with distinct advantages in the right foundry scenarios.

1. Cost‑performance advantage

Zirconia ceramic filters require complex high‑temperature sintering processes, raw‑material costs are high, and unit prices remain substantially higher.

High‑silica fiberglass mesh provides reliable surface‑filtration & flow‑stabilizing performance at a far lower unit cost.

✅For mass‑production of small‑and‑medium‑size steel castings with moderate metallurgical requirements, it effectively lowers per‑part filtration expenses without sacrificing core slag‑blocking capability.

2. Metal‑flow & gating‑system compatibility

Ceramic foam filters possess thick solid‑body structures, which create noticeable flow resistance. Foundries must redesign sprue cross‑sections and adjust pouring speed to compensate for pressure loss.

The thin planar structure of high‑silica leno‑weave mesh brings minimal flow resistance. Molten‑steel throughput is higher.

✅It can be fitted directly into existing original gating‑system layouts (sprue‑cup, parting‑line, runner), no modification to mould or sprue dimensions is required. Foundries keep their existing pouring‑process parameters unchanged.

3. Easy‑handling & flexible forming

Zirconia ceramic filter plates are rigid and brittle. Cutting on‑site easily produces ceramic debris, which risks becoming in‑mould inclusions; custom special‑shaped sizes come with long lead‑times and extra costs.

✅High‑silica fiberglass mesh is flexible. Factories can cut sheets into circles, squares or irregular contours on‑site according to sprue‑cup dimensions. Pre‑formed filter‑caps are also available. No hard brittle fragments will be generated during cutting and installation. On‑site operation is simple and time‑saving.

4. Working‑condition boundary reminder (critical disclaimer)

High‑silica fiberglass mesh relies on surface screening instead of three‑dimensional depth‑adsorption filtration as with zirconia ceramics.

• ✅ Suitable scenario: small‑to‑medium carbon‑steel / low‑alloy‑steel castings; pouring temperature ≤ 1600 °C; mass‑production with moderate quality‑specifications.

• ❌ Not recommended: large heavy‑section steel castings, stainless‑steel, super‑alloy parts, pressure‑vessel‑grade components with extremely strict inclusion‑control requirements. For those cases, zirconia ceramic foam filters shall be your first‑choice solution.

SDS Certification

SDS-High Silica Fiberglass Filter Mesh