Overview

A custom 316 stainless steel mesh is a flat, photochemically etched screen that delivers uniform apertures for filtration, EMI shielding and precision screening. Type 316 / 316L stainless is specified because its molybdenum content resists chloride pitting far better than general-purpose grades, so the mesh holds up in humid, saline or mildly acidic service. Etching dissolves metal through a photoresist mask rather than weaving or punching it, so apertures leave the line with smooth walls, consistent web width and no burrs or roll-over at the hole edge.

For an equipment designer, a custom 316 stainless steel mesh addresses three recurring limits: micron-scale holes and ultra-fine webs that a punch die cannot hold over long runs, woven wire that sheds strands and varies in thickness, and chloride or high-temperature media that quickly rust ordinary stainless. Geometry comes from artwork, so a new hole pattern or mesh count is a new film rather than a new die. Supplied from 0.02 mm to 0.6 mm stock, meshes are usually passivated or electropolished to strip hole-edge burrs and support lamination or welding downstream.

Parameter Window

• Available Materials: stainless 316 / 316L, 304, nickel and copper alloys on request
• Material Thickness Range: 0.02–0.6 mm
• Tolerance: ±0.01 mm on hole diameter, ±0.02 mm on web width
• Minimum Feature: 0.10 mm hole and 0.08 mm web at 0.10 mm stock
• Surface Options: passivation, electropolish, bright anneal, deburr, nickel plating
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Artwork & DFM Review — Convert the hole array to vector artwork and check hole-to-thickness ratio, web width and pitch.
2. Material & Temper Selection — Match 316 / 316L lot, temper and flatness to the medium and open-area target.
3. Cleaning & Lamination — Degrease and micro-etch, then laminate dry-film resist with no bubbles over fine webs.
4. UV Exposure — Expose both faces through registered film so front and back openings align on a shared grid.
5. Development & Inspection — Develop the resist and inspect apertures for pinholes or scumming before etching.
6. Controlled Etching — Double-sided spray-etch in stainless-matched chemistry; time and temperature set wall taper and web width.
7. Stripping & Finishing — Strip resist, passivate or electropolish to deburr hole edges, and bright-anneal if flatness must recover.
8. Aperture & Open-Area Verification — Measure hole, web and open area, sample through-hole ratio, then protect and tray-pack.

Core Advantages

1. Smooth hole walls: Etched apertures are burr-free with consistent open area, so flow resistance and cut-point are predictable.
2. No hard tooling: A new pattern or mesh count is a new phototool, keeping short runs and revisions economical.
3. Flat and strand-free: One-piece construction avoids woven-wire shedding and thickness variation, so stacks bond evenly.
4. Fine holes and webs: 0.10 mm holes with 0.08 mm webs hold at 0.10 mm stock for high-precision filtration and shielding.
5. Long corrosion life: Molybdenum-bearing 316L resists pitting in saline or weak-acid media, cutting maintenance.
6. Batch repeatability: A custom 316 stainless steel mesh from one approved film etches identically from first article to volume lots, simplifying qualification.

Typical Applications

• Precision filtration: High-accuracy filter screens for hydraulic, fuel and process fluids with consistent cut-points.
• EMI shielding: Vent and cavity shields that balance shielding effectiveness with airflow and open area.
• Food and pharmaceutical screening: 316L sieve and standard-test meshes that resist cleaning agents and clean easily.
• Acoustic and dust protection: Thin, flat dust-and-sound meshes for microphones, speakers and sensors.
• Battery and fuel cells: Porous support plates for current collection and gas diffusion with even flow distribution.
• Medical and lab devices: Filter and cell-strainer meshes that resist sterilization and will not snag material.

Design Notes & Process Considerations

1. Hole versus thickness: Keep the smallest hole at 0.10 mm or 1.2 × material thickness, whichever is larger, to avoid merging holes.
2. Web and open area: State target open area and minimum web; very high open area weakens the sheet and hurts flatness.
3. Wall taper: Double-sided etching gives slight taper, so state allowed inlet-to-outlet diameter difference to avoid fit issues.
4. Flatness callout: Specify flatness per 100 mm and overall bow; thin meshes distort during anneal if not fixtured.
5. Surface and medium: Note passivation or polish and contact medium; hot chloride service favors 316L and a corrosion review.
6. Panelization and marking: Group meshes on a shared registration grid with orientation marks to speed lamination and assembly.