Material page for filter discs in 304 Stainless Steel. The standard general-purpose stainless mesh alloy. Covers the grade designation (AISI 304 (1.4301)), corrosion and magnetic behavior, cleaning and compatibility notes, and the specifications available.
Why Choose 304 Stainless Steel for Filter Discs
The standard general-purpose stainless mesh alloy. For filter discs, this matters when good general corrosion resistance in atmosphere and fresh water is the controlling requirement.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
|---|---|
| Magnetic response | Essentially non-magnetic (annealed) |
| Service temperature | approx. +450 °C continuous |
| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
Corrosion Behavior in Filtration Service
304 gives good resistance to atmospheric exposure, fresh water and most neutral media, and is the standard general-purpose grade for filter discs. In chloride-bearing service (seawater, brines, road-salt spray) step up to 316L; in reducing acids consider a nickel alloy.
Comparable Alloys
The direct upgrade from 304 is 316L (chlorides, acids, CIP). Downgrade options for dry, indoor screening are galvanized or plain steel. For heat beyond ~450 °C move to Inconel 600; for seawater immersion consider Monel 400 or duplex 2205 for filter discs.
Specifications of Filter Discs Available in 304 Stainless Steel
| 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 |