What These Polished Aluminum Sheets Are
1050, 1060 and 1100 belong to the 1xxx series of commercially pure aluminum. 1050 contains at least 99.5 percent aluminum, 1060 at least 99.6 percent, and 1100 at least 99.0 percent with a small copper addition of 0.05 to 0.20 percent that gives it slightly higher strength. Because the alloys are nearly pure metal, they take a bright, uniform polish without the patchy streaks that harder alloys can show. A typical polished surface reaches a roughness of Ra 0.05 um or better with light reflectivity above 90 percent, which is why these sheets are the default choice whenever a mirror-like finish is required.
How the Three Alloys Compare
Although all three are high-purity alloys, each has a slightly different balance of properties. 1050 offers the highest purity and the most uniform surface, which suits food and beverage equipment where non-reactivity and easy sanitizing matter. 1060 combines 99.6 percent purity with excellent formability, so it bends into intricate decorative shapes without cracking and is widely used for wall panels and retail displays. 1100 is about 15 percent stronger than 1060 thanks to its copper content, making it a better fit for light-duty functional parts such as electronics enclosures and nameplates that must resist dents. For a project that needs both shine and slight rigidity, 1100 is the practical choice; for pure aesthetics, 1060 polishes most smoothly.
Key Properties Behind the Finish
The polished appearance is supported by properties that matter during fabrication and service. Formability is high: elongation is at least 25 percent for 1050 and 1060 in the annealed condition and at least 20 percent for 1100, so sheets bend into 90-degree angles and curved shapes without cracking. Corrosion resistance is strong, with over 800 hours of salt fog resistance per ASTM B117 in typical tests, which suits humid environments such as bathrooms. The alloys weld cleanly with TIG or MIG processes, and 1050 and 1060 are compliant with FDA food-contact requirements, so they appear in commercial kitchen counters and serving trays.
Applications Across Industries
In interior design, polished sheets are used for wall panels, mirror frames and lamp shades in thicknesses of 0.5 to 1.5 mm, where light weight simplifies mounting. In food service, kitchen backsplashes and serving trays use 1.0 to 2.0 mm material that is food-safe, easy to clean and resistant to grease. Electronics applications such as speaker casings and nameplates use 0.3 to 1.0 mm sheet, and retail fixtures, mannequin stands and signage commonly use 0.8 to 2.5 mm stock. Compared with polished stainless steel, these sheets weigh about 65 percent less and show fewer fingerprints; compared with polished brass, they cost about one third as much and do not tarnish.
Working and Maintenance Tips
Thin sheets up to about 1.0 mm can be scored and snapped with a sharp utility knife, while thicker material is best cut with a jigsaw fitted with a fine-tooth metal blade. Wear clean gloves when handling, because skin oils leave smudges on the polished surface, and keep the protective film in place until installation. Clean with a microfiber cloth and mild soap or glass cleaner; abrasive sponges and abrasive cleaners scratch the finish. For wall mounting, double-sided adhesive tape avoids drilling holes that would break the polished look.
Available Specifications
Typical supply ranges are 0.2 to 3.0 mm thickness, with 0.5 to 2.0 mm most common for polished work. Standard sheet sizes include 1220 x 2440 mm and 1500 x 3000 mm, and custom shapes such as circles for mirrors can be cut. Polish levels are commonly specified as 6K matte, 8K mirror and 10K high-gloss mirror for luxury projects. Material is supplied to ASTM B209 and ISO 6362, with 1050 and 1060 available as FDA-compliant, and each batch can be accompanied by a mill test report covering polish quality and purity.
FAQ
Can polished 1050, 1060 and 1100 sheets be anodized?
Yes. The high purity of these alloys produces a clear, uniform anodized layer, and the polished base finish gives an attractive bright anodized result. The coating thickness should be specified according to the application and the applicable standard.
Which temper should I order for bending?
For tight bends and deep forming, the annealed O temper is preferred because it offers the highest ductility. Half-hard tempers such as H14 can still be bent with a slightly larger bend radius, while hard tempers should be avoided for sharp bends.
Do these sheets scratch easily?
Because the alloys are soft, the polished surface can be scratched if abrasive tools or unfiltered handling are used. Using protective film, clean gloves and proper tooling minimizes the risk, and minor scratches can often be removed with fine polishing compound.
Is 1100 safe for food contact?
1100 is widely used in food handling equipment, but the purity of 1050 and 1060 makes them the more common choice when explicit FDA compliance is required. Confirm the applicable food-contact regulation for the specific application before specifying.
Can these sheets be welded without losing the finish?
TIG and MIG welding work well on these alloys, but the heat affected zone will show discoloration. Polished finishes are normally applied after welding, or the weld area is re-polished, to restore a uniform appearance.