What Is Micro Expanded Metal?

Micro expanded metal is an ultra-fine expanded metal product defined by extremely small diamond openings (typically ≤ 3mm SWD) and ultra-thin material thickness (down to 0.1mm). It is manufactured using precision cold-expanding technology to ensure uniform openings, smooth edges, and consistent performance.

Unlike standard expanded metal, micro expanded metal is designed for precision applications that require fine screening, high airflow, lightweight structure, and high mechanical strength. It combines the rigidity of expanded metal with the fineness of woven wire mesh.

Our Anping expanded metal factory uses CNC-controlled expanding machines to produce micro expanded metal with ±0.02mm tolerance.

Key Advantages of Micro Expanded Metal

Micro expanded metal outperforms other fine mesh materials in precision applications:

Ultra-Fine Openings
Produces openings as small as 0.8mm × 1.6mm – far finer than most standard expanded metal.

Self-Supporting & Rigid
No frame or backing required, unlike fragile woven mesh that easily tears or deforms.

High Flow & Uniform Porosity
Consistent diamond openings ensure even airflow, liquid flow, and filtration performance.

Ultra-Lightweight
Thin materials (0.1–0.5mm) reduce weight for portable and compact devices.

Smooth & Burr-Free
Precision manufacturing eliminates burrs, making it safe for medical and electronic use.

Standard Specifications of Micro Expanded Metal

These specifications make our micro expanded metal suitable for the most demanding high-precision industries.

Materials for Micro Expanded Metal

We produce micro expanded metal using high-grade materials for corrosion resistance, conductivity, and hygiene:

304 Stainless Steel – General corrosion resistance, food-safe, medical-grade
316L Stainless Steel – Marine-grade, chemical-resistant, surgical applications
Aluminum Alloy – Ultra-lightweight, conductive, electronics applications
Red Copper / Brass – High conductivity, EMI shielding, electronic components
Galvanized Steel – Economical, general industrial micro mesh

All materials meet international standards and are suitable for precision filtration and high-tech applications.

Core Applications for Micro Expanded Metal

Micro expanded metal is widely used in precision industries worldwide:

Precision Filtration: Micro-filters for fuel, oil, water, air, and medical fluids
Electronics & EMI Shielding: Battery components, speaker grilles, shielding covers
Medical Devices: Surgical instruments, implantable components, ventilator filters
Automotive Industry: Sensors, micro-ventilation, fuel system filters
Aerospace: Lightweight ventilation, sensor protection, compact components
Consumer Electronics: Headphone grilles, smart device vents, speaker meshes
Optical Equipment: Light diffusers, sensor covers, precision protective meshes

Micro Expanded Metal vs. Woven Wire Mesh

Micro expanded metal offers clear advantages over traditional woven mesh:

Micro Expanded Metal
• One-piece structure, no loose wires
• High rigidity, self-supporting
• Burr-free, smooth edges
• Long service life, no deformation
• Uniform opening size

Woven Wire Mesh
• Loose wires, easy to fray
• Fragile, needs backing support
• Rough edges, burrs
• Short service life, easy to break
• Inconsistent opening size

For high-value precision applications, micro expanded metal is the superior choice.

Custom Micro Expanded Metal Services

We provide fully customized micro expanded metal for unique requirements:

• Ultra-fine custom openings (down to 0.5mm SWD)
• Ultra-thin thickness (0.1mm and below)
• Custom sheet sizes and cut-to-pieces parts
• Forming, bending, and stamping into finished components
• Surface treatment: passivation, electropolishing, coating

Our custom expanded metal service supports R&D teams and OEM manufacturers worldwide.