Fiberglass Mesh Filter for Molten Steel Filtration FM‑07‑ST
FM‑07‑ST high‑silica fiberglass mesh filter is engineered specifically for short‑run molten steel pouring. Manufactured from high‑silica fiberglass (SiO₂ ≥96%) with enhanced high‑temperature refractory coating, it tolerates pouring temperatures up to 1620 °C. It traps slag, refractory spall and non‑metallic inclusions inside the gating system, delivers cleaner steel castings and reduces internal‑defect scrap for small‑to‑medium steel foundry parts.
This filter grade targets carbon steel, low‑alloy steel and general‑grade stainless‑steel castings for short‑time pouring cycles, offering cost‑effective in‑mold filtration versus ceramic‑foam filters.
Key Benefits of FM‑07‑ST Molten Steel Filter Mesh
- High‑Temperature Performance: Rated for steel pouring temperatures up to 1620 °C, suited for most conventional carbon‑steel & low‑alloy‑steel short‑duration pouring processes.
- Enhanced Thermal‑Shock Resistance: Reinforced weave & upgraded refractory coating for steel‑grade thermal loads; maintains structural integrity for short‑time pouring cycles with minimal shrinkage under normal foundry conditions.
- Effective Slag Capture: Retains oxide slag, sand debris and refractory‑material spall before molten steel enters the casting cavity.
- Flexible Custom Processing: Easily cut into discs, rectangles, strips and special formed shapes to match varied gating layouts.
- Chemically Inert to Molten Steel: Does not introduce harmful contaminant elements to steel melt.
Important Material Note: Softening point of high‑silica fiber reaches ~1700 °C, this is raw‑material property, not continuous‑service temperature. Effective contact time in molten steel is extremely limited: approx. 4 minutes @1500‑1560 °C; approx. 10‑15 seconds @1560‑1620 °C. Extended immersion will cause fiber embrittlement, mesh collapse and contamination risk. Designed for single‑pour short‑cycle applications only.
Industrial High-Temperature Fiberglass Mesh Filter - Improve Casting Quality
Technical Data Sheet: Molten Steel Filtration Fiberglass Filter
| Item | Specifications |
|---|---|
| Product Code | FM‑07‑ST |
| Material | High‑silica fiberglass cloth (SiO₂ ≥96%) with enhanced high‑temp refractory coating |
| Working Pouring Temp | 1500‑1620 °C |
| Softening Point | ~1700 °C (Material property, not continuous‑service temperature) |
| Effective Contact Time | ≈4 min @1500‑1560 °C；≈10‑15 sec @1560‑1620 °C |
| Standard Sheet Size | 300 × 300 mm, 400 × 400 mm |
| Custom Options | Cut‑to‑size discs, strips, special formed shapes available |
| Mesh Aperture | 1.5 × 1.5 mm / 2.0 × 2.0 mm / 2.5 × 2.5 mm |
Compatible Casting Materials & Processes
Carbon steel, low‑alloy steel, general‑grade stainless‑steel small‑&‑medium‑size castings
Sand casting for steel parts, short‑duration single‑pour gating systems
High‑alloy / super‑heat‑exceeded steel grades (please consult our engineering team before trial)
Not recommended for long‑hold / large‑volume continuous steel pouring. For critical high‑quality steel castings, we recommend ceramic foam filters. For molten iron casting, please check FM‑07‑FE series.
Typical Application Industries
Applied for pump‑valve steel components, machinery housings, gear blanks, general‑engineering steel castings and other small‑to‑medium‑size steel‑part production.
Our FM‑07‑ST filters are supplied to 50+ countries across Europe, Asia, Middle East and Americas for steel foundry production.
Important Installation & Pouring Notes
Improper installation or over‑exposure to high‑temp molten steel is the top cause of mesh failure, metal bypass and casting defects.
- Mandatory pre‑heating: Pre‑heat filter before contacting molten steel to avoid thermal‑shock cracking. Cold filter will crack instantly upon steel‑melt contact.
- Ensure filter sits flat on clean runner seat; fully seal perimeter gaps. Any gap creates metal bypass and nullifies filtration performance.
- Select correct mesh aperture: 2.0‑2.5 mm is general‑purpose range for steel casting. Too‑fine mesh brings high‑flow‑resistance risk, may cause mis‑run or incomplete filling.
- Filter area should be 3‑4 times choke cross‑section for steel casting; strictly avoid prolonged molten‑steel contact time.
- Store filter sheets in dry sealed packaging, keep away from moisture.
- For large‑volume, high‑critical‑quality steel castings, evaluate ceramic‑foam filter as alternative solution.
Share your pouring temperature, steel alloy grade, runner dimension and required mesh opening. We provide custom cutting and bulk‑order support for steel foundry customers.
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