Filter Discs woven or fabricated in Monel 400 (UNS N04400 (2.4360)) keeps its dimensional specification to ISO 9044 base cloth; the alloy determines corrosion behavior (excellent resistance to seawater, hydrofluoric acid and alkalis) and the service temperature limit (approx. +540 °C). Both are covered below with the full specification table.
Why Choose Monel 400 for Filter Discs
The marine and chemical-processing specialist alloy. For filter discs, this matters when excellent resistance to seawater, hydrofluoric acid and alkalis is the controlling requirement.
Alloy Properties
| Grade designation | UNS N04400 (2.4360) |
|---|---|
| Magnetic response | Slightly magnetic |
| Service temperature | approx. +540 °C |
| Corrosion characteristic | Excellent resistance to seawater, hydrofluoric acid and alkalis |
Cleaning & Compatibility
Special alloys tolerate aggressive cleaning chemistry, but confirm the specific acid/alkali against the alloy datasheet — e.g. Monel handles HF but not oxidizing nitric; titanium handles nitric but not HF. When welding elements into frames, use matching filler and inert-gas backing to preserve corrosion resistance at the joint.
Comparable Alloys
Between the special alloys, selection is chemistry-led: Monel 400 (HF, seawater), Inconel 600 (heat/oxidation), Hastelloy C-276 (broadest acid resistance), nickel 200 (caustic), titanium (chlorides, weight). 316L remains the cost benchmark — specify a special alloy only when the datasheet chemistry demands it.
Specifications of Filter Discs Available in Monel 400
| Diameter (mm) | Mesh / micron options | Layers | Edge treatment | Reference standard |
|---|---|---|---|---|
| 10 | 40-Mesh to 500-Mesh / 25-400 u00b5m | 1-5 | Plain cut or spot welded | ISO 9044 base cloth |
| 20 | 40-Mesh to 500-Mesh / 25-400 u00b5m | 1-5 | Plain cut or spot welded | ISO 9044 base cloth |
| 38 | 40-Mesh to 500-Mesh / 25-400 u00b5m | 1-5 | Spot welded or bound rim | ISO 9044 base cloth |
| 50 | 40-Mesh to 500-Mesh / 25-400 u00b5m | 1-7 | Aluminum / SS bound rim | ISO 9044 base cloth |
| 100 | 40-Mesh to 635-Mesh / 20-400 u00b5m | 1-7 | Aluminum / SS bound rim | ISO 9044 base cloth |
| 200 | 40-Mesh to 635-Mesh / 20-400 u00b5m | 1-7 | SS bound rim | ISO 9044 base cloth |
| 300 | 40-Mesh to 635-Mesh / 20-400 u00b5m | 1-7 | SS bound rim | ISO 9044 base cloth |
Where Monel 400 Filter Discs Is Used
- Plastic extrusion: single and multi-layer extruder screens.
- Fuel, oil & hydraulics: inlet strainer discs in pumps and fittings.
- Spray & nozzles: nozzle filter screens.
- Appliances & medical: small metal mesh filter discs in valves and devices.
Ordering Filter Discs in Monel 400
- Diameter & shape: Round, rectangular, kidney or custom shapes cut to drawing.
- Mesh & layers: Single layer or a stack of different meshes for strength and rating.
- Edge: Plain cut, spot-welded, aluminum/copper/stainless rimmed or sintered edge.
Mistakes to Avoid with Filter Discs
- Plain-cut fine discs that fray and shed wires.
- Stacking layers in the wrong order.
