Technical Specification GuideENQ-SPEC-04

How to choose perforated metal

A practical guide to selecting hole pattern, size, and material.

Calculated open area
Standard & custom margins
Fabrication tolerances
Key Evaluation Steps3-Step Overview

Hole patterns

Round, square, or slotted geometries and their open area percentages.

Sheet gauges & margins

Material thickness, blank borders, and flat-sheet tolerances.

Alloy selection

Carbon steel, stainless 304/316, aluminum, and protective finishes.

Technical Specification Reference

Perforated metal engineering guide

Select the right hole geometry, open area ratio, alloy, and sheet thickness for your mechanical, filtration, and architectural requirements.

Choosing hole size and pattern by application

The pattern orientation dictates fluid flow resistance, particle capture thresholds, and acoustic dissipation.

Pattern Matrix
Profile 0120% – 45% Open
Filtration & Separation
Pattern: Round hole (staggered 60° pitch)
Standard Aperture Size
0.5 mm – 6.0 mm (0.020" – 0.250")
Engineering Function

Round holes provide the smoothest media flow with minimal turbulence and clean backwash capability.

Standard Alloys

304 & 316L Stainless Steel

Profile 0245% – 63% Open
Ventilation & HVAC
Pattern: Square or high-ratio staggered round
Standard Aperture Size
4.0 mm – 12.0 mm (0.156" – 0.500")
Engineering Function

Balances acoustic damping, free airflow, and pressure drop while shielding internal mechanical units.

Standard Alloys

Galvanized Steel & Aluminum 3003-H14

Profile 0330% – 55% Open
Architectural & Solar Shading
Pattern: Custom slotted, decorative, or patterned round
Standard Aperture Size
8.0 mm – 25.0 mm (0.312" – 1.000")
Engineering Function

Controls daylight diffusion and solar heat gain coefficients (SHGC) while maintaining structural panel rigidity.

Standard Alloys

Anodized Aluminum & Weathering Steel

Need custom perforation tooling or structural calculations?

Send your project specifications, DXF drawings, or mechanical requirements to our engineering team for exact feasibility review and formal quotation.

Mutual Metal Fabrication

Ready to specify your perforated metal panels?

Browse standard sheet patterns or send your custom hole size, gauge, and margin requirements for an engineered quote tailored to your application.

Round, square, slotted & architectural patterns
Carbon steel, stainless steel, & aluminum alloys
Prompt technical quotes & custom perforation runs