Sells Expanded Metal, Perforated, Welding Wire-Electrodes, Welding Wire - Electrodes +1
Buys —
Buys —
🔒 Phone · Email · Web
›
Sheet, plate or coil punched with holes in a regular pattern on a multi-punch press. Perforated steel is used where air, light, sound, liquid or particles must pass through a sheet that is still strong and flat: screens and sieves, acoustic panels, ventilation grilles, façades, guards, filters and silencers.
Perforated sheet is produced on wide multi-tool presses that punch a full row of holes at each stroke while the sheet or coil advances, or on CNC turret presses for small batches and special patterns. The base material is cold rolled, hot rolled, galvanized, pre-painted, stainless or aluminium sheet; carbon steel is usually galvanized before perforation or painted or galvanized after.
A perforated sheet is described by hole shape and size, pitch (the distance between hole centres) and arrangement — round holes are most often on 60° staggered centres, which gives the strongest sheet for a given open area. The open area, the percentage of the sheet that is holes, decides how much air, light or material passes, and with it the strength and stiffness that remain. As a rule the hole diameter should not be much smaller than the sheet thickness in steel, or the punches break.
Uses range from heavy screening plates in quarries and mines, through sieves and grain-drier floors, to acoustic ceilings, speaker grilles, HVAC diffusers, sunscreens and architectural façades with decorative patterns. Margins can be left unperforated for fixing, and the sheets can be bent, rolled and welded like ordinary sheet.
In the Gulf, perforated metal is widely used in building façades, ceilings and mashrabiya-style screens, as well as in industrial screening and HVAC. It is made by local perforators and fabricators from imported sheet, and also imported as finished sheet.
A perforation is written as hole shape, size and pitch, for example 'R5 T8, 60° staggered' — round 5 mm holes on 8 mm centres, which gives about 35 % open area. Open area for round holes on 60° staggered centres = 90.7 × (d/p)² %.
| Region | Standard | What it covers |
|---|---|---|
| International | ISO 7806 ISO |
Industrial plate screens — codification for designating perforations |
| International | ISO 10630 ISO |
Industrial plate screens — specifications and test methods |
| Germany | DIN 24041 DIN |
Perforated plates — dimensions |
| Europe | EN 10346 CEN-CENELEC |
Hot-dip coated steel sheet, the usual galvanized base material |
| Europe | EN 10130 CEN-CENELEC |
Cold rolled low-carbon steel sheet, the usual uncoated base material |
Grade equivalents and the standards bodies: Steel grades & standards
Steel Mills - Agents & Traders · Coil Service Center · Stockist - Distributor · Fabrication · Jeddah
Steel Mills - Agents & Traders · Stockist - Distributor · Other Steel Users · Dubai
Steel Mills - Agents & Traders · Coil Service Center · Stockist - Distributor · Fabrication · Jeddah
No open offers or inquiries for this product right now.
Translation isn’t available right now. The site is shown in English.
Loading translation…
