Slotted Perforated Aluminum Panel

As a slotted perforated aluminum panel supplier, GNEE reviews customer drawings and confirms material and processing requirements against available production capabilities. Send a CAD, PDF or DXF drawing, or just describe the application, and the technical team confirms slot width, length, pitch, arrangement, edge margin and finish.

Request a quote for slotted perforated aluminum panel

Overview of Slotted Perforated Aluminum Panel

A slotted panel begins as solid aluminum sheet or plate. The elongated openings are cut by perforating, so the sheet keeps a continuous metal body while gaining a set of parallel slots. Against a round or square layout, the slot steers sightlines and airflow along one axis and reads as a linear, directional surface. GNEE supplies the base material and carries out the perforation and any follow-up work to the drawing.

Aluminum Alloy and Temper for Slotted sheets

Slotted perforated panels are produced from the common architectural and industrial aluminum alloys. The alloy is picked for formability, corrosion resistance, anodizing response and strength, then perforated to the drawing. The points below explain the alloy options and how they sit beside each other for a perforated panel.

Aluminum Alloy Options for Slotted Panels

3003 (Al-Mn, 3xxx) is the general-purpose choice for slotted panels where formability and cost lead; 5005 (Al-Mg, 5xxx) is selected where anodizing response and a consistent decorative finish matter; 5052 (Al-Mg, 5xxx) is chosen for higher strength and corrosion resistance; 6061 (Al-Mg-Si, 6xxx) is used where structural strength from heat treatment is required. The exact temper is fixed per order against the drawing and finish route.

Slotted Panel Alloy Comparison

Tensile values are indicative for the base unperforated sheet at typical tempers; guaranteed minimums come from the EN 10204 3.1 MTC. After perforation the panel's remaining strength depends on open area and ligament width, not the base alloy by itself.

Specification of Slotted Perforated Aluminum sheet

The table below lists the parameters that define a slotted perforated aluminum panel order. GNEE supplies the aluminum and performs the listed processing; where a value is shown as a typical range, the exact figures are fixed from the drawing and production review. Because slotted holes are often supplied staggered, the achieved open area is confirmed from the drawing.

The values above are typical reference ranges for the product family; the exact alloy, temper, thickness, dimensions, hole geometry and tolerances are fixed from the drawing and production review. ASTM B209/B209M covers the base flat-rolled material; post-perforation hole, pitch, edge and flatness tolerances are agreed from the drawing.

Aluminum Alloy and Temper We Supply for Slotted Panels

GNEE supplies slotted panels in 3003-H14/H24, 5005-H34, 5052-H32 and 6061-T6 as standard aluminum options. 3003 is the general-purpose and most cost-effective route; 5005 is chosen where anodizing response matters; 5052 is used for coastal or humid sites because of its better corrosion resistance; 6061 is considered where the panel needs higher strength or a longer unsupported span. The precise temper is set per order from the drawing.

Slotted Panel Thickness, Width and Length We Supply

Typical panel thickness is 0.8–3.0 mm for architectural use, with thicker plate available where added support is needed. Slotted panels are usually supplied at 1000 / 1220 / 1250 / 1500 mm widths, with lengths to 3000–6000 mm or cut to length and built into modules. Folded returns and defined margins are added where the frame or fixing detail requires them.

Slotted Hole Geometry of Perforated Aluminum Sheet

A slotted panel is defined by the slot width (w), slot length (l) and the pitch in two directions (p1 across the slot, p2 along it). The elongated shape gives a directional visual and lets slot orientation steer airflow and shading. The achievable pattern is confirmed against available tooling and the drawing.

Slot Width, Length and Pitch of Perforated Aluminum Panel

Four terms define a slotted hole layout:

Slot width (w): the narrower dimension of the elongated opening.

Slot length (l): the longer dimension of the elongated opening.

Pitch p1: the center-to-center distance across the slot width.

Pitch p2: the center-to-center distance along the slot length.

Open Area of Slotted Perforated Aluminum Panel

Open area is the percentage of the panel surface occupied by slots. For slots of width w and length l on a straight rectangular pitch p1 by p2, the open area is:

Open Area (%) ≈ (w × l) / (p1 × p2) × 100

Staggered slotted layouts (where the slots are offset row to row) are calculated from the actual geometry rather than this straight-grid formula. Panels with solid margins, non-perforated zones or irregular spacing are also calculated from the actual perforated area.

The table is a calculation example using the formula above, not a statement of GNEE's stocked patterns. Slotted holes are commonly supplied staggered, so the achieved open area is confirmed from the drawing.

How Slotted Hole Perforation Affects Panel Strength

A higher open area removes more material and shortens the ligament between slots, which lowers stiffness and changes behaviour under load and during forming. For a slotted panel the final thickness and slot layout should be set together with the support spacing and any later bending.

Processing of Slotted Perforated Aluminum Panel

GNEE provides the processing chain for custom slotted panels: base-material selection, cutting, perforating, deburring, leveling, inspection and surface finishing. Provide the drawing and GNEE confirms the layout, cut size and finish as part of the order; specific equipment, tooling limits and maximum dimensions are confirmed per project.

Sheet Preparation for Slotted Aluminum Panel

The base aluminum sheet or plate is verified for alloy and temper and cut to the starting size before perforation. Confirm the base material standard so the certificate matches the order.

Perforating Slotted Holes in Aluminum Sheet

Slotted patterns are produced by CNC punching with tooling matched to the slot width, length and pitch, or by laser for fine slots and custom outlines. For aluminum, the slot width against sheet thickness, ligament width and margins are checked before production.

Deburring and Leveling of Slotted Panel

Perforating can leave burrs on the die side and may bow the sheet. Deburring and roller leveling restore edge quality and flatness; state your acceptance limits for burr height and flatness on the inquiry.

Cutting and Edge Finishing of Slotted Panel

Cut-to-size and edge processing are part of the order. State the cutting method, maximum processed dimension and tolerance so GNEE can confirm the achievable limits.

Surface Finishes for Slotted Perforated Aluminum Panel

Elongated slots show the finish along long linear edges, so directional consistency matters most. The achievable appearance depends on the alloy and the processing sequence; the finish route, film thickness and slot-edge appearance are confirmed per order.

Mill Finish on Slotted Aluminum Panel

The original rolled surface, supplied as-standard for slotted panels. Confirm surface appearance and protection, especially where the long slot edges and flat face are both exposed.

Anodized Finish for Slotted Aluminum Panel

Anodizing integrates the finish into the oxide layer and gives a consistent, durable appearance. On a elongated slots pattern, 5005 anodizes more uniformly than 3003 or 5052; confirm the achievable film thickness, colour consistency and slot edges coverage from a sample.

Powder Coating for Slotted Aluminum Panel

Powder coating adds a durable colour layer over the slotted panel. Confirm coating thickness, colour, adhesion and surface uniformity, and note that the coating must follow the long slot edges without build-up.

PVDF Coating for Slotted Aluminum Panel

PVDF (fluorocarbon) coating is specified where exterior weatherability is required, such as façades and long-life slotted sunshade screens. Confirm the coating system, film thickness and weathering requirement.

Applications of Slotted Perforated Aluminum Panel

Slotted panels are chosen where a directional, linear opening, light weight and corrosion resistance are needed together. GNEE supplies the aluminum and the perforation confirmed as available; for complete systems, share the full specification and GNEE supplies the matching panel and processing. Confirm the grade, temper, finish and detailing for the exposure.

Sunshade and Solar Control in Slotted Aluminum

Used for building sunshades and brise-soleil where the elongated slots give a continuous linear screen and steer shading and daylight along one axis. Buyers specify slot orientation, open area, alloy and finish.

Directional Ventilation and Screening in Slotted Aluminum

Used for ventilation covers and screening where the slot orientation directs airflow and gives a distinctive linear appearance. Specify slot width, length, pitch and target open area; the actual airflow follows from the panel geometry.

Equipment Covers and Machine Guards in Slotted Aluminum

Used for ventilation covers and protective guards where the elongated opening sets the airflow and the panel rigidity carries the load. Confirm the panel thickness, hole layout and support spacing so the cover meets the mechanical requirement.

Industrial Enclosures in Slotted Aluminum

Used for machine enclosures and acoustic or speaker panels where a linear opening reads as a designed surface and supports the panel's function. The slot layout is confirmed with the airflow or acoustic requirement.

Other Perforated Metal Materials Available Beyond Aluminum

In addition to slotted perforated aluminum panels, GNEE can also supply perforated metal products in other materials, including stainless steel, carbon steel, copper and weathering steel (Corten). Different materials offer different combinations of corrosion resistance, mechanical strength, weight and cost; the suitable option depends on the application environment, required material grade, sheet thickness, hole pattern and fabrication requirements. Send us your drawings or specifications to discuss material options and product availability.

Stainless steel, carbon steel, copper and weathering steel are supplied by GNEE per grade, thickness, pattern and processing; they are not run on the aluminum elongated slots line and use their own standards and tolerances. Specific grades, fabrication and quality documents are confirmed per project.

Slotted Panel Inspection and Certification

Every order is supplied with an MTC to EN 10204 3.1 confirming alloy and temper, together with dimensional and visual inspection of thickness, slot width, length, pitch, flatness and edge quality. The base material is checked to the chosen standard - ASTM B209/B209M, EN 485-2, EN 573-3 or GB/T 3880 - so the certificate lines up with the order. Any specified non-destructive or mechanical checks are agreed per project.

Slotted Panel Packaging and Delivery

Panels are protected with interleaved paper or a surface protection film, fitted with edge guards, and packed for seaworthy export on wooden pallets or in cases. Each package is labeled per order with alloy, thickness, dimensions and purchase reference. Packaging is tuned to the slotted panel size, coating and shipping route so the visible face stays protected.

Slotted Panel Standards and HS Code

The base aluminum sheet follows ASTM B209/B209M, EN 485-2, EN 573-3, EN 1396 or GB/T 3880, selected per order. As a perforated aluminum product the panels are typically classified under HS code 7606.12 (rectangular alloy perforated aluminum sheet); final classification is subject to the destination customs authority. Slotted holes are specified under the DIN 24041 L (Langloch) code using the same w, t, c, s and A0 dimension system.

About GNEE

For slotted panels, GNEE supplies the aluminum base and performs the perforation and follow-up processing to the drawing. GNEE is a source manufacturer of aluminum perforated panels (established 2008) with exports to 100+ countries and regions. Orders ship with EN 10204 3.1 mill test certificates and pricing benchmarked to SMM. MOQ is flexible for both trial and volume orders, with typical lead time of 15–30 days and quotation reply within 24 hours of a complete inquiry.

Request a Quote for Slotted Perforated Aluminum Panel

Planning a project and need slotted panels? Share your alloy and temper, sheet thickness, panel width by length, slot width, slot length, pitch in both directions, arrangement, target open area, edge margin, surface finish, quantity and application, or simply a CAD / PDF / DXF drawing. GNEE returns a written quote covering exact dimensions and tolerances, finish, packaging, MOQ, unit price and the 15–30 day lead time. Quoted terms are FOB or CIF, payment by T/T or L/C; the EN 10204 3.1 MTC ships with the order and 3.2 or third-party inspection is offered on request.

For slotted panels orders, the following commercial terms apply:

Commercial terms

MOQ stays flexible - both small trial runs and full-container, bulk or contract orders are welcomed.

Standard items are delivered in 15–30 days after the order is confirmed.

Each shipment includes an EN 10204 3.1 MTC; GNEE holds ISO 9001 and can arrange 3.2 or third-party inspection.

Each quote is priced to the SMM aluminum index for that order; alloy, thickness, hole pattern and finish set the unit price.

We answer a well-defined inquiry within 24 hours.

Request a quote from a slotted perforated aluminum panel manufacturer

If you do not have all the technical parameters, upload your drawing or share the application. Our team reviews the available information and confirms the specifications that need clarification.

FAQ

Q: What is a slotted perforated aluminum panel?

A: It is an aluminum sheet or panel punched with a regular elongated (slotted) opening pattern. The elongated openings give a distinctive linear visual and directional airflow, which makes slotted panels common for sunshades, screening and ventilation. Slot width, length, pitch, open area and panel dimensions are specified per drawing or standard pattern.

Q: How is the open area of a slotted perforated aluminum panel calculated?

A: For slots of width w and length l on a straight rectangular pitch p1 (across the width) by p2 (along the length), open area is approximately (w times l) divided by (p1 times p2) times 100 percent. Staggered slotted layouts are calculated from the actual geometry, not this straight-grid formula.

Q: What does the DIN 24041 code L mean for slotted holes?

A: In DIN 24041, L (Langloch) is the code for elongated or slotted holes. The standard uses the same w, t, c, s and A0 dimension system as the round and square codes, so a slotted perforation is specified by slot width, pitch and open area under the L designation.

Q: Which aluminum alloy is used for slotted perforated panels?

A: 3003-H14 or H24 is common for formability and cost, 5005-H34 where anodizing response matters, 5052-H32 where higher strength and corrosion resistance are needed, and 6061-T6 where structural strength is required. The alloy is picked per order to suit the application and finish route. For slotted panels the visible finish often makes 5005 the preferred anodizing grade.

Q: What are slotted perforated aluminum panels used for?

A: They are used for sunshades, directional ventilation, screening, acoustic and equipment panels where the elongated opening gives a linear visual and controls airflow direction. The slot orientation is chosen with the airflow or shading requirement.

Q: Can you supply slotted perforated sheets in stainless steel, carbon steel, copper and weathering steel (Corten)?

A: Yes. In addition to aluminum, GNEE can assist with slotted or other hole patterns in stainless steel, carbon steel, copper and weathering steel (Corten), subject to grade, thickness, pattern and processing requirements. Share your drawing to discuss the suitable material.

Q: What information is needed for a slotted perforated aluminum panel quotation?

A: Provide alloy and temper, sheet thickness, panel width by length, slot width, slot length, pitch in both directions, arrangement, target open area, edge margin, surface finish, quantity and application, or simply a CAD, PDF or DXF drawing. A drawing can replace most fields.

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