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Perforated metal sheet

Name: Perforated metal sheet
Brand: Tianguan Mesh Co., Ltd.

Punched on CNC turret presses from coil and plate, then cut, folded or curved to your drawing. Holes from 0.5 mm up, any pattern that has a die.

Sheet thickness0.2 – 6.0 mm

Hole size0.5 – 30 mm

Open area10 – 70 %

Sheet sizeup to 1500 × 3000 mm

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Galvanized perforated metal sheet with a staggered pattern of round holes

Specification range

Standard production range for this line. Anything outside it is a conversation, not a refusal — tell us the application and we will say what the tooling can hold.

A sample panel and a mill certificate come before the container does. Ask for both with the first quotation.

Thickness	0.2 / 0.5 / 0.8 / 1.0 / 1.5 / 2.0 / 3.0 / 4.0 / 5.0 / 6.0 mm
Hole shape	Round, square, slotted, hexagonal, triangular; custom tooling available
Hole size	0.5 – 30 mm (smaller holes on thin gauge, larger on request)
Pattern	60° staggered, 45° staggered, straight row; pitch to drawing
Open area	10 – 70 %, calculated per pattern
Sheet size	1000 × 2000, 1220 × 2440, 1500 × 3000 mm; cut to size
Material	Cold-rolled mild steel, hot-dip or pre-galvanized steel, SS 304 / 316, aluminium 1060 / 3003, brass
Finish	Galvanized, PVC coated, powder coated to RAL, brushed or mirror polish
Tolerance	Hole diameter ±0.1 mm under 3 mm; sheet size ±1 mm; camber under 1 mm/m
Further work	Shearing, laser cutting, folding, rolling to radius, welded frames, CNC-cut panels

Details that decide the price

Perforated sheet is punched through hardened tooling, hole by hole, in a fixed pattern. Three numbers describe it completely: hole size, pitch (the centre-to-centre distance) and arrangement — straight rows or staggered at 60°.

Those three numbers set the open area, and open area decides almost everything else: how much air or light passes, how much the sheet weighs, how far it deflects under foot, and how much of what sits behind it stays visible. Send hole size and pitch, and we return the open area, the weight per sheet, and a price.

Hole pattern and open area

A staggered 60° pattern fits more holes into the same area than a straight grid, so it gives more open area at the same pitch and keeps the sheet stiffer in both directions. Straight rows read as a visible grid, and are used where the look matters as much as the airflow.

Open area follows directly from hole size and pitch. For a 60° pattern it is roughly 0.907 × (hole diameter ÷ pitch)² as a percentage: a 3 mm hole on a 5 mm pitch comes out at about 33 %. We put the calculated figure on the quotation so it can be checked against the drawing.

The rule that catches most drawings

The hole should not be smaller than the sheet thickness, and in practice wants to be at least the thickness — a 1 mm hole in 2 mm plate needs a punch that breaks almost immediately. Below that ratio, expect laser or chemical etching, and a different price.

Edge margins matter too. Punched holes need a solid band at the edge of the sheet, usually one hole diameter or more, otherwise the edge distorts when the sheet is folded or lifted.

Tooling and custom patterns

Standard patterns sit on the shelf: 1, 2, 3, 4, 5 and 8 mm round holes in common pitches. Anything else — a logo pattern, an oblong slot, a mixed pattern for a facade — needs a die. That is a one-off cost, and usually seven to twelve days before the first sheet.

Send a DXF, a PDF drawing, or a photograph with the hole size written on it. If you only have the application, tell us the airflow or the weight limit and we will propose a pattern.

Finishing

Hot-dip galvanizing after punching covers the cut edges and the inside of every hole, which is why it is the right choice for outdoor screens and machine guards. Pre-galvanized sheet is cheaper but leaves bare edges at each hole. Powder coat adds colour and a smoother surface, and holds up better than paint on an exterior.

Where it goes

Typical applications for this line. If yours is not listed, it usually still fits.

Screens, guards and machine enclosures
Acoustic panels and ventilation grilles
Facade cladding, balustrade and sunshade panels
Sieving, grading and filter support
Speaker grilles, appliance and display backs
Shelving, trolley sides and rack backs

Questions buyers ask first

Can the hole be smaller than the sheet thickness?

Normally no. A punch needs the hole to be at least as large as the thickness to survive; below that, laser cutting or chemical etching is the practical route and the cost per square metre rises sharply.

How do I calculate open area?

Round holes at 60° staggered: 0.907 × (hole ÷ pitch)² × 100. Straight rows: 0.785 × (hole ÷ pitch)² × 100. We confirm the figure against the drawing on every quotation.

What is the lead time for a custom pattern?

Seven to twelve days for the die, then normal production. Standard patterns ship in fifteen to twenty days from confirmation.

Which material for a coastal outdoor facade?

SS 316 for salt spray, or hot-dip galvanized steel with a powder coat if the budget is tighter. Aluminium works inland but pits near the sea unless it is anodised or PVDF coated.