Engineering parameters and tooling guides

Sheet flattening and leveling tolerances

Hole pitch and open-area calculation

Alloy verification and mill certificates

Custom tooling dies and slit coil limits

All expanded and perforated sheets pass through multi-roll precision leveling machines to eliminate camber and oil canning, ensuring strict flatness before dispatch.

Open-area percentages are computed using standard geometric formulas for staggered and straight pitch arrays, critical for acoustic attenuation and HVAC airflow design.

Every production lot of SS 304, SS 316, and Galvanized Iron is accompanied by mill test reports confirming chemical composition and mechanical tensile limits.

Send your custom CAD profiles for specialized aperture shapes. Our in-house toolroom fabricates custom press dies with exact edge-distortion control.

Matching punch pitch geometry to structural load requirements ensures zero edge distortion across heavy industrial facade cladding.

WHITE METAL WORKS Engineering Division

Need unlisted perforation tooling dies?

Connect directly with our fabrication engineers via WhatsApp for custom sheet dimensions and specialized aperture schedules.