Aluminum sheet and aluminum plate are two of the most widely purchased forms of flat-rolled aluminum in the world. They look similar in a catalogue. They come from the same rolling mills. And yet choosing the wrong one for your project can mean ordering material that is too heavy, too thin, the wrong temper, or the wrong surface finish for your application.
This guide explains exactly what separates aluminum sheet from aluminum plate, covers the thickness ranges and gauge conversion chart you need for ordering, reviews the most common applications and alloys for each, explains surface finish options including anodized and sublimation-coated sheet, and walks through the price factors that affect what you actually pay. By the end, you will know which product to specify and what information to include in your purchase order.
The standard industry definition separates aluminum sheet from aluminum plate by thickness. Aluminum sheet is flat-rolled aluminum up to 6.35 mm (0.25 inches) thick. Aluminum plate is flat-rolled aluminum thicker than 6.35 mm. Some suppliers and standards set the boundary at 4 mm or 5 mm, but 6.35 mm is the most widely accepted dividing line internationally.
In practice, the distinction goes beyond thickness alone. Aluminum sheet is produced by cold rolling after hot rolling, which tightens dimensional tolerances and produces a smoother, more consistent surface. Aluminum plate is typically produced by hot rolling only, resulting in wider tolerances and a coarser surface. Sheet is commonly delivered in flat cut pieces or coil form; plate is delivered as cut pieces only, and the weight per piece is substantial.
The functional consequence: aluminum sheet is the material you bend, stamp, form, and cut into panels, housings, and enclosures. Aluminum plate is the material you machine, saw, and weld into structural frames, tooling blocks, and load-bearing components. Both have their place. The right choice depends on your application's thickness requirement, structural demands, and fabrication method.
Aluminum sheet is flat-rolled aluminum with a thickness between approximately 0.2 mm and 6.35 mm. It is produced by first hot-rolling aluminum slabs to an intermediate thickness, then cold-rolling to the final gauge. The cold-rolling step is what gives aluminum sheet its defining characteristics: tight thickness tolerances, a smooth and consistent surface, and the work-hardening that produces the H-series tempers (H14, H16, H18, H24) commonly specified for sheet products.
Aluminum sheet is available in a wide range of standard widths: 1000 mm, 1219 mm (48 inches), 1500 mm, and 2000 mm are the most common. Length is typically 2000 mm, 2438 mm (96 inches), or 3000 mm for standard cut sheets. Custom lengths are available from most suppliers with minimum order quantities.
The most frequently ordered thicknesses for aluminum sheet are 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm, 5.0 mm, and 6.0 mm. For applications requiring specific imperial gauges, see the gauge conversion table in Section 5.
The alloy determines the mechanical properties, corrosion resistance, formability, and surface quality of the sheet. The most common alloys in sheet form are: 1100 (commercially pure, food-grade, maximum formability), 3003 (general purpose, roofing, HVAC), 5052 (marine atmosphere, fuel tanks, automotive), 5083 (structural marine, above and below waterline), and 6061 (structural, moderate strength, good machinability). For architectural and decorative applications where anodizing quality is critical, 6063 and 1100 produce the cleanest results.
Aluminum sheet is available in two delivery forms. Cut sheet is sheared to specific dimensions at the mill or service center and delivered as flat pieces ready for use. Coil is the full-width rolled strip wound onto a mandrel, typically used by fabricators with in-house slitting and shearing equipment who process high volumes of material. For most buyers purchasing in moderate quantities, cut sheet is the practical choice.
Aluminum plate is flat-rolled aluminum with a thickness greater than 6.35 mm, typically ranging from 8 mm to 200 mm or more for specialty applications. Unlike sheet, aluminum plate is produced primarily by hot rolling without a final cold-rolling step. This means the surface is slightly coarser, tolerances are wider, and the material retains an as-hot-rolled grain structure rather than the deformed grain structure of cold-rolled sheet.
Aluminum plate is typically available in widths of 1250 mm, 1500 mm, and 2000 mm, with lengths of 2500 mm, 3000 mm, and 4000 mm. Common thicknesses run from 8 mm, 10 mm, 12 mm, 15 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, up to 100 mm and beyond for specialty structural and aerospace applications. Plates are heavy: a 25 mm thick 6061 aluminum plate measuring 1500 x 3000 mm weighs approximately 304 kg. Handling, transport, and machining costs are significant considerations.
Tooling plate is a subset of aluminum plate produced to tighter flatness and thickness tolerances than standard hot-rolled plate. It is used for machined fixtures, jigs, mould bases, and precision structural components where the plate must be flat to within a few tenths of a millimeter before any machining is done. The most common tooling plate specifications are 6061-T651 and the proprietary MIC-6 cast aluminum plate, which offers even better flatness and stress relief than rolled plate.
Plate applications are typically load-bearing or structurally critical, so the alloy selection skews toward higher-strength grades: 6061-T651 for general structural and machining applications, 5083-H116 for marine structural work, 7075-T651 for aerospace and high-strength machining, and 2024-T351 for fatigue-critical aerospace structure. For signage base plates and non-structural plate applications, 5052 and 6061 in standard tempers are common and cost-effective.
Feature | Aluminum sheet | Aluminum plate |
Thickness range | 0.2 mm – 6.35 mm (up to 0.25") | >6.35 mm (0.25"+) — up to 200 mm+ |
Production process | Hot roll + cold roll — tighter tolerance | Hot roll only — wider tolerance |
Surface finish | Smooth, consistent — mill finish | Coarser — mill finish or machined |
Dimensional tolerance | Tighter (±0.05–0.15 mm typical) | Wider (±0.1–0.5 mm typical) |
Common alloys | 1100, 3003, 5052, 6061, 5083 | 6061, 7075, 5083, 2024 |
Weight (per m² at 3mm) | ~8.1 kg/m² | N/A (plate starts >6.35 mm) |
Weight (per m² at 10mm) | N/A | ~27.1 kg/m² |
Fabrication methods | Shearing, bending, stamping, rolling | Sawing, milling, waterjet, drilling |
Delivery form | Cut sheet or coil | Cut plate (by sheet/slab) |
Typical applications | Roofing, HVAC, signage, packaging, auto body | Tooling, aerospace, marine structure, machinery |
Surface treatments | Anodized, coated, sublimation, brushed | Mill finish, anodized, machined face |
Minimum order | 1 tonne (stock); lower for cut sheets | Higher MOQ — heavy per-piece weight |
Relative price (per kg) | Slightly higher (more processing) | Slightly lower (less cold-rolling) |
The price-per-kilogram note in the table deserves explanation. Aluminum sheet typically costs more per kilogram than plate of the same alloy because of the additional cold-rolling processing required to reach thinner gauges. However, because sheet is thinner and lighter, the cost per square meter of coverage is often lower for sheet than for plate. When comparing prices across the two product categories, always calculate cost per square meter or cost per finished part — not simply cost per kilogram.
In some markets — particularly North America — aluminum sheet thickness is specified in gauge numbers rather than millimeters. The gauge system for aluminum (based on the American Wire Gauge or Brown & Sharpe system) is different from the gauge system used for steel. A 16-gauge aluminum sheet is thinner than a 16-gauge steel sheet. Always confirm which material the gauge table applies to when reading specifications.
Gauge (AWG) | Thickness (mm) | Thickness (in) | Common applications |
6 ga | 4.11 mm | 0.162" | Heavy structural sheet, floor plates |
8 ga | 3.26 mm | 0.128" | Industrial panels, heavy roofing |
10 ga | 2.59 mm | 0.102" | Truck bodies, structural cladding |
12 ga | 2.05 mm | 0.081" | General fabrication, HVAC heavy duty |
14 ga | 1.63 mm | 0.064" | Roofing sheet, automotive panels |
16 ga | 1.29 mm | 0.051" | Lightweight roofing, general sheet metal |
18 ga | 1.02 mm | 0.040" | HVAC ductwork, light panel applications |
20 ga | 0.81 mm | 0.032" | Thin cladding, signage backing |
22 ga | 0.64 mm | 0.025" | Decorative panels, lightweight cladding |
24 ga | 0.51 mm | 0.020" | Foil-weight applications, packaging |
For international buyers, millimeter specification is cleaner and avoids gauge confusion. When ordering from a supplier who uses gauge numbers, always confirm the exact millimeter equivalent before placing the order. The most frequently ordered thicknesses in metric markets are 1 mm, 1.5 mm, 2 mm, 3 mm, and 4 mm for sheet, and 10 mm, 20 mm, and 25 mm for plate.
Aluminum roofing sheet is one of the largest single applications for flat-rolled aluminum worldwide. 3003-H24 and 5052-H32 are the standard alloys for corrugated and standing-seam roofing profiles. Common thicknesses range from 0.5 mm for lightweight decorative applications to 1.2 mm for structural roofing exposed to wind and snow loads. The H24 temper provides the combination of strength and ductility needed to form corrugation profiles without cracking, while retaining adequate structural performance after forming.
Sheet metal HVAC ductwork uses 3003-H14 almost exclusively, in thicknesses from 0.5 mm to 1.5 mm depending on duct size and pressure rating. The alloy forms cleanly into rectangular and round duct sections using Pittsburgh lock and snap-lock seams. Its corrosion resistance and light weight make it a practical alternative to galvanized steel in commercial HVAC systems.
Aluminum sheet is the standard substrate for outdoor advertising panels, road signs, retail signage, and display boards. Thicknesses typically range from 1 mm to 3 mm for standard signs, with 1.5 mm and 2 mm being the most common. Alloys 1100, 3003, and 5052 are all used. The sheet is typically supplied mill-finish or with a white PE coating as a base for printing. For premium outdoor signage requiring long-term weather resistance, PVDF-coated or anodized aluminum sheet is specified.
Sublimation aluminum sheet is a specialty product used in the promotional products, gifting, and custom printing industry. The base material is typically 1100 or 3003 aluminum sheet in thicknesses from 0.45 mm to 1.5 mm, with a proprietary white polyester coating applied to one or both faces. The coating accepts dye-sublimation ink when heat is applied, producing vibrant, permanent full-color images directly on the metal surface. Applications include photo panels, personalized gifts, decorative tiles, plaques, and trophies. This is a growing market with consistent demand from online retailers and custom printing services.
Anodized aluminum sheet is used wherever a durable, attractive metal surface is required: interior wall panels, elevator cladding, kitchen backsplashes, furniture trim, consumer electronics enclosures, and architectural feature elements. The anodizing process converts the surface of the aluminum into a hard, porous aluminum oxide layer that can be left clear (silver) or dyed in a wide range of colors. 1100 and 6063 produce the clearest, brightest anodize finish because of their low iron content. 5052 and 3003 anodize acceptably for utilitarian applications where the finest appearance is not critical.
1100 aluminum sheet in O temper is the standard for food containers, foil laminate packaging, bottle caps, and food processing equipment liners. The alloy contains no alloying elements that could affect taste or violate food-contact regulations. Common thicknesses range from 0.2 mm for foil-weight applications to 1.5 mm for structural food equipment components.
5052-H32 and 6061-T4 aluminum sheet are used in automotive body panels, fenders, hoods, and interior structural components. Thicknesses range from 0.8 mm to 2.5 mm. The automotive industry values aluminum sheet for its combination of strength, formability, and weight reduction compared to steel, contributing to improved fuel economy and reduced emissions in passenger vehicles.
5083-H116 aluminum plate is the global standard for ship hull plating, bulkheads, and structural marine components in permanent seawater contact. Common plate thicknesses for commercial vessel construction range from 6 mm for lighter craft to 20 mm or more for heavy commercial vessels and naval applications. The H116 temper is specifically engineered for seawater resistance and is accepted by all major classification societies including DNV, ABS, and Lloyd's Register.
2024-T351 and 7075-T651 aluminum plate are machined into the fuselage frames, wing spars, structural fittings, and pressure bulkheads that form the primary structure of commercial and military aircraft. Plate thicknesses in aerospace applications typically range from 4 mm to 50 mm, with some specialized applications using thicker sections. Full material traceability and AMS certification are required for aerospace structural plate.
6061-T651 aluminum plate is the workhorse material for machine bases, fixture plates, jigs, and industrial tooling. Its combination of good machinability, dimensional stability after machining, and moderate cost makes it the practical default for precision machined components that do not require the extreme strength of 7075. Common thicknesses range from 10 mm to 100 mm. Tooling plate versions with tighter flatness specifications are available for applications requiring minimal stock removal to achieve a flat datum surface.
Thicker aluminum plate (4 mm to 10 mm) is used as the base substrate for large outdoor signs, monumental signage, and dimensional lettering that requires rigidity rather than flexibility. The plate is typically routed, waterjet-cut, or CNC-milled to shape. 5052 and 6061 are common choices for signage plate, balancing corrosion resistance with machinability.
The surface finish is as important as the alloy and thickness for many applications. Here are the main options and when to specify each.
Mill finish is the as-rolled surface with no additional treatment. It shows the natural silver-gray appearance of aluminum with visible rolling marks and minor surface variations. Mill finish is the least expensive option and is appropriate wherever the surface will be painted, coated, welded, or hidden from view. It is also the starting point for most downstream surface treatments.
Anodizing converts the aluminum surface into a hard, porous aluminum oxide layer through an electrochemical process. The result is a surface that is harder than the base metal, corrosion-resistant, and available in a range of colors through dyeing. Clear anodize produces a silver finish; black, bronze, gold, and custom colors are available. Anodize thickness for architectural applications is typically 15 to 25 microns (AA15 to AA25 class). Alloys 1100 and 6063 produce the clearest, most uniform anodize; 5052 and 3003 produce acceptable results for less demanding applications.
Sublimation-coated aluminum sheet has a white polyester coating applied that accepts dye-sublimation ink under heat and pressure, producing full-color printed images on the metal surface. The images are permanent, UV-resistant, and scratch-resistant compared to paper or vinyl prints. This coating is factory-applied and cannot be replicated in the field — buyers must specify sublimation sheet at the procurement stage rather than treating standard sheet after delivery.
Polyethylene (PE) coating and polyvinylidene fluoride (PVDF) coating are applied to aluminum coil before slitting and cutting, producing pre-painted sheet for architectural cladding, roofing, and signage applications. PE coatings are standard for interior and moderate-exposure applications. PVDF coatings offer superior UV and weathering resistance and are specified for high-end exterior architectural applications with 20 to 25-year color retention requirements.
Brushed aluminum sheet has a fine, uniform linear grain pattern created by abrasive finishing. It is widely used for decorative applications in consumer electronics, kitchen equipment, elevator panels, and architectural trim. Mirror finish is a polished surface with high reflectivity, used for lighting reflectors, decorative automotive trim, and solar concentrators. Both finishes are typically produced on 1100 or 3003 base sheet.
Tread plate (also called checker plate or diamond plate) is aluminum sheet with a raised pattern rolled into the surface for slip resistance. It is used for stair treads, floor plates, truck beds, and access platforms. The raised pattern is typically a five-bar or diamond pattern. Common thicknesses are 2 mm to 6 mm. Alloys 3003 and 5052 are standard for tread plate.
Pricing for aluminum sheet and plate varies with alloy, temper, thickness, width, surface treatment, and order quantity. Here is a practical framework for understanding what drives the cost.
Both products are priced on a per-kilogram basis at the mill level, with service centers adding processing margins for cutting, slitting, and handling. The LME (London Metal Exchange) aluminum price sets the base commodity cost, to which the mill adds a conversion premium that covers rolling, alloying, and processing costs. The conversion premium varies by alloy and temper: high-strength alloys (7075, 2024) and specialty tempers (T651, T7351) carry significantly higher conversion premiums than commodity alloys (1100, 3003) in standard tempers.
When buyers compare aluminum sheet options or budget for projects, pricing per square meter is often more intuitive than pricing per kilogram. The conversion is straightforward: weight per square meter (kg/m²) = thickness (mm) × 2.71. For example, 2 mm thick aluminum sheet weighs 5.42 kg/m². If the price is $3.50 per kilogram, the cost per square meter is $3.50 × 5.42 = $18.97/m². For 3 mm sheet, the weight is 8.13 kg/m² and the per-square-meter cost scales proportionally.
Surface treatments add cost above the base sheet price. Anodizing (clear, standard 15-micron class) typically adds 15 to 30% to the base sheet price, depending on sheet size and production volume. Color anodizing adds more. Sublimation coating adds approximately 20 to 40% over the base substrate cost, reflecting the specialty coating application process. PVDF coating for architectural panels adds the most, reflecting both the coating cost and the coil-coating process. Mill-finish sheet is always the least expensive option.
Aluminum plate typically costs less per kilogram than aluminum sheet of the same alloy because the cold-rolling process required for sheet adds processing cost. However, high-strength plate alloys (7075, 2024) are more expensive per kilogram than commodity sheet alloys (3003, 1100), so direct price comparisons must account for alloy selection. For large plate orders, minimum order quantities and cutting fees apply — confirm these with your supplier before finalizing the budget.
• Alloy and temper: 3003-H14 is among the least expensive options; 7075-T651 can cost four to six times more per kilogram
• Thickness: thinner gauges (under 1 mm) carry higher processing costs per kilogram than standard sheet
• Width: non-standard widths requiring slitting carry a service premium
• Surface treatment: mill finish is cheapest; PVDF coated is most expensive
• Order quantity: mill-run orders (typically 5 tonnes or more) receive the best pricing; small cut orders carry service center premiums
• Certifications: material with EN, ASTM, or AMS certification and full MTR documentation costs more than uncertified commercial material
Application | Sheet or plate | Typical thickness | Recommended alloy |
Roofing & wall cladding | Sheet | 0.5–1.2 mm | 3003-H24 / 5052-H32 |
HVAC ductwork | Sheet | 0.5–1.5 mm | 3003-H14 |
Food containers | Sheet | 0.2–1.0 mm | 1100-O / 3003-O |
Signage & advertising | Sheet or plate | 1–6 mm | 1100 / 5052 |
Sublimation printing | Sheet (special) | 0.45–1.5 mm | Coated 1100 / 3003 |
Anodized decorative | Sheet | 1–3 mm | 6063 / 1100 |
Automotive body panels | Sheet | 0.8–2.0 mm | 5052 / 6061 |
Marine hull structure | Plate | 6–20 mm | 5083-H116 |
Aerospace structure | Plate | 4–50 mm | 2024-T351 / 7075-T651 |
Machine bases & tooling | Plate | 10–100 mm | 6061-T651 |
Shipyard & offshore | Plate | 8–25 mm | 5083-H116 / 6061 |
Pressure vessels & tanks | Plate | 6–25 mm | 5083 / 6061 |
Mould & die tooling | Plate | 20–150 mm | 6061-T651 / 7075-T651 |
A complete purchase specification avoids misunderstandings, delays, and material returns. When contacting a supplier for aluminum sheet or plate, provide the following information:
• Alloy number (e.g., 3003, 5052, 6061)
• Temper (e.g., H14, H32, T6) — if unsure, describe the forming operations you plan to perform
• Thickness in mm (or gauge number with confirmation of mm equivalent)
• Width in mm
• Length in mm (or specify coil if you process coil in-house)
• Quantity in pieces or kilograms
• Surface finish (mill finish, anodized, sublimation coated, PE coated, etc.)
• Any certification requirements (EN 573, ASTM B209, food-grade documentation, etc.)
• Alloy and temper (e.g., 6061-T651, 5083-H116, 7075-T651)
• Thickness in mm
• Width and length in mm (confirm whether you need cut-to-size or standard mill size)
• Quantity in pieces or tonnes
• Surface finish (mill finish is standard; machined face available on request)
• Certification requirements (MTC 3.1 or 3.2, AMS specification, classification society endorsement if marine)
If you are not certain which alloy or temper to specify, describe your application to the supplier: the environment (outdoor / indoor / marine / food contact), the structural load (decorative / moderate / load-bearing), and the fabrication method (bending / machining / welding). An experienced supplier can recommend the right specification for your project. This is especially useful for buyers new to aluminum procurement who have been specifying sheet or plate by appearance rather than engineering specification.
Use the following questions to determine whether you need aluminum sheet or aluminum plate before requesting a quote.
• Is the thickness less than 6.35 mm? → You need aluminum sheet
• Is the thickness more than 6.35 mm? → You need aluminum plate
• Will the material be bent, stamped, or roll-formed? → Sheet (O or H-temper for forming)
• Will the material be CNC-machined or milled? → Plate (T651 or T7351 for machining stability)
• Is the application roofing, HVAC, or architectural cladding? → Sheet (0.5–1.5 mm, 3003 or 5052)
• Is the application a machine base, fixture, or tooling block? → Plate (10–100 mm, 6061-T651)
• Is the application a sign or advertising panel? → Sheet (1–3 mm) or thin plate (4–6 mm) depending on rigidity required
• Is the application sublimation photo printing or custom gifts? → Sublimation-coated sheet (0.45–1.5 mm)
• Is the application a marine hull or ship structure? → Plate (6–20 mm, 5083-H116)
• Is the application aerospace structure? → Plate (4–50 mm, 2024-T351 or 7075-T651, AMS certified)
We supply both aluminum sheet and aluminum plate across a comprehensive range of alloys, tempers, thicknesses, and surface finishes. Our product range covers the full spectrum from 0.2 mm foil-weight sheet to heavy structural plate, with the material documentation and surface treatment options to meet your procurement requirements.
• Sheet alloys in stock: 1100, 3003, 5052, 5083, 6061, 6063 in standard and custom tempers
• Plate alloys in stock: 6061-T651, 5083-H116, 7075-T651, 2024-T351 and additional grades on order
• Thickness range: 0.2 mm sheet through 200 mm plate
• Surface treatments: mill finish, anodized (clear and color), sublimation coated, PE coated, PVDF coated, brushed, mirror, tread plate
• Cut-to-size service: specify exact dimensions and we cut to order with straight, burr-free edges
• Mill Test Certificates (MTC) provided with every shipment for full material traceability
• Export experience across Southeast Asia, the Middle East, Africa, Europe, and the Americas
• Fast RFQ turnaround: provide alloy, temper, thickness, width, length, quantity, surface treatment, and any certification requirements — we respond within 24 hours
Whether you are sourcing aluminum roofing sheet for a large construction project, anodized sheet for architectural cladding, sublimation-coated sheet for a printing business, or structural plate for a marine or industrial application, we have the product and the documentation to support your procurement.
Contact us today with your specification and we will respond promptly with pricing and lead time.
