8011 Aluminum Closure Sheet Supplier
8011 Aluminum Closure Sheet Supplier for Cap and Closure Production
As an experienced 8011 aluminum closure sheet supplier, Haomei Aluminum CO., LTD., Inc. provides cap stock engineered for high-speed forming, printing, coating, sealing, and pilfer-proof closure production. AA8011 is an Al-Fe-Si alloy widely used where stable mechanical strength, clean surface quality, food-contact safety, and reliable deep drawing performance are required.
For beverage, wine, pharmaceutical, edible oil, cosmetics, and chemical packaging, 8011 aluminum closure sheet helps create closures that protect contents, maintain shelf appearance, support tamper evidence, and run efficiently on automated cap-making lines.
Product Role in Modern Closures
8011 aluminum closure sheet is used as the base metal for roll-on pilfer-proof caps, PP caps, screw caps, vial seals, wine bottle caps, and other formed packaging components. Its function is not limited to covering a container. The sheet must support multiple packaging demands at the same time.
| Function | How 8011 Aluminum Closure Sheet Performs |
|---|---|
| Sealing protection | Provides stable cap geometry for liner insertion and tight bottle engagement |
| Forming performance | Supports drawing, punching, knurling, threading, and bridge forming |
| Tamper evidence | Allows precise tear-band and pilfer bridge production |
| Decoration | Accepts lacquer, primer, printing ink, embossing, and color coating |
| Corrosion resistance | Protects against moisture, alcohol, mild acids, oils, and storage exposure when coated |
| Lightweight packaging | Reduces closure weight while maintaining cap strength |
| Food and pharma use | Can be supplied with compliant surface treatment and coating systems |
For buyers comparing closure alloys and cap stock choices, 8011 Aluminum Closure Sheet is often selected for its balanced strength, formability, and coating compatibility.
Main Product Parameters
| Item | Typical Supply Range |
|---|---|
| Alloy | AA8011, EN AW-8011 |
| Product form | Sheet, coil, strip, pre-painted coil, coated sheet |
| Temper | O, H14, H16, H18, H24, customized by use |
| Thickness | 0.15-0.50 mm, common 0.18-0.28 mm |
| Width | 200-1650 mm |
| Length | Sheet cut to order, commonly 500-2000 mm |
| Coil ID | 76 mm, 152 mm, 300 mm, 508 mm |
| Surface | Mill finish, degreased, DOS treated, chromate-free pretreated, coated, printed |
| Coating options | Epoxy, polyester, vinyl, organosol, clear lacquer, color lacquer |
| Common colors | Silver, gold, white, black, red, blue, custom printing |
| Edge condition | Trimmed, slit edge, low burr for cap stamping |
| Packaging | Eye-to-sky or eye-to-wall coil packing, seaworthy wooden pallet |
Implementation Standards
Quality supply depends on controlled chemistry, thickness tolerance, surface treatment, and coating performance. Haomei Aluminum CO., LTD., Inc. can align production with international and regional standards according to customer drawings or industry requirements.
| Standard | Scope |
|---|---|
| ASTM B209 | Aluminum and aluminum alloy sheet and plate |
| EN 573 | Chemical composition and alloy designation |
| EN 485 | Mechanical properties, tolerances, and delivery conditions |
| GB/T 3880 | Aluminum and aluminum alloy rolled sheet and strip |
| JIS H4000 | Aluminum and aluminum alloy sheets and strips |
| ISO 9001 | Quality management system for production control |
| RoHS | Restricted substance control when required |
| REACH | Material compliance for export markets when required |
| FDA or LFGB related coating requirements | Available for food-contact closure applications depending on coating system |
Chemical Composition of 8011 Aluminum Alloy
8011 belongs to the 8xxx series and contains controlled iron and silicon additions. These elements help improve strength, rolling stability, and closure forming behavior. Values are typical limits for AA8011, with single figures shown as maximum unless a range is stated.
| Element | Content, % |
|---|---|
| Si | 0.50-0.90 |
| Fe | 0.60-1.00 |
| Cu | <=0.10 |
| Mn | <=0.20 |
| Mg | <=0.05 |
| Cr | <=0.10 |
| Zn | <=0.10 |
| Ti | <=0.08 |
| Other, each | <=0.05 |
| Other, total | <=0.15 |
| Al | Balance |
Temper Conditions and Mechanical Data
Temper selection affects stamping speed, cap height, thread definition, tear-band strength, and torque performance. H14 and H16 are widely used for closure stock, while soft or harder tempers can be chosen for special processing.
| Temper | Processing State | Typical Tensile Strength, MPa | Typical Yield Strength, MPa | Elongation, % | Common Use |
|---|---|---|---|---|---|
| O | Annealed, soft | 80-110 | 35-55 | 12-25 | Deep forming, complex caps |
| H14 | Half hard | 125-165 | 95-135 | 2-6 | PP caps, bottle closures, general cap stock |
| H16 | Three-quarter hard | 145-185 | 120-155 | 1-4 | ROPP caps, pilfer-proof closures |
| H18 | Full hard | 165-205 | 145-180 | 1-3 | Shallow caps, high stiffness designs |
| H24 | Strain hardened and partially annealed | 120-160 | 85-125 | 4-8 | Caps requiring better forming margin |
Actual mechanical values can be adjusted through rolling reduction, annealing schedule, and customer cap tooling requirements.
Closure Applications
8011 aluminum closure sheet is used by cap plants, printing plants, beverage packers, and pharmaceutical packaging converters. It can be supplied as plain mill-finish material for in-house coating or as coated and printed stock ready for punching and forming.
| Application | Recommended Temper | Typical Thickness | Performance Focus |
|---|---|---|---|
| ROPP caps for spirits and wine | H14, H16 | 0.20-0.24 mm | Threading, pilfer bridge strength, clean knurling |
| PP caps for beverages | H14 | 0.18-0.25 mm | Smooth forming, lacquer adhesion, sealing liner fit |
| Pharmaceutical vial seals | O, H14 | 0.18-0.30 mm | Hygiene, tight tolerance, clean surface |
| Edible oil caps | H14, H16 | 0.20-0.28 mm | Corrosion resistance, torque stability |
| Cosmetic bottle closures | H14, H24 | 0.20-0.35 mm | Surface finish, embossing, decorative coating |
| Chemical container caps | H16, H18 | 0.22-0.35 mm | Strength, coating resistance, dimensional stability |
Surface, Coating, and Printing Performance
Closure sheet often passes through degreasing, pretreatment, coating, curing, printing, slitting, and stamping. A clean, uniform surface is essential because tiny oil marks, scratches, or coating defects may become visible after printing or cap forming.
| Surface Item | Typical Requirement |
|---|---|
| Oil stain | Not allowed on visible surface |
| Black spot or roll mark | Controlled according to agreed inspection level |
| Burr height | Usually <=0.03 mm after slitting, tighter on request |
| Flatness | Suitable for automatic feeding and printing lines |
| Wetting tension | Commonly >=32 dynes/cm after pretreatment, higher if specified |
| Coating adhesion | Cross-cut or tape test according to coating system |
| Coating thickness | Often 3-8 g/m2 per side, customized by application |
| Pinholes | Strictly controlled for food, beverage, and pharma closures |
Pre-painted 8011 closure sheet can be supplied with one-side or two-side coating. Internal lacquer protects the packaged product and metal surface, while external coating supports brand color, logo printing, gloss, matte texture, or metallic appearance.
Thickness Tolerance and Dimensional Control
Stable thickness helps cap manufacturers maintain drawing depth, skirt length, torque release, and liner compression. For high-speed presses, coil camber and edge quality also matter.
| Dimension | Typical Control Level |
|---|---|
| Thickness tolerance | +/-0.005 mm to +/-0.015 mm depending on gauge |
| Width tolerance | +/-0.2 mm to +/-1.0 mm depending on slit width |
| Diagonal tolerance for sheets | Controlled by cut-to-length specification |
| Coil camber | Low camber for automatic feeding |
| Surface roughness | Adjustable for coating and forming needs |
| Coil weight | 500-3000 kg, customized |
Quality Control from Supplier to Converter
A dependable supplier must control the full route from melting to final packing. At Haomei Aluminum CO., LTD., Inc., production control can include alloy verification, hot rolling, cold rolling, annealing, tension leveling, surface cleaning, coating inspection, precision slitting, and final export packaging.
| Inspection Point | Test Method or Control Target |
|---|---|
| Chemical composition | Spectrometer analysis |
| Tensile strength | Standard tensile test |
| Elongation | Tensile test after sample preparation |
| Thickness | Micrometer or online gauge control |
| Surface defects | Visual and light-table inspection |
| Coating adhesion | Tape test, cross-cut test |
| Solvent resistance | MEK rub test where required |
| Color consistency | Colorimeter control for printed or coated stock |
| Packing moisture | Desiccant, film wrapping, wooden pallet protection |
How to Choose the Right 8011 Closure Sheet
The best selection depends on cap diameter, cap height, drawing ratio, decoration method, liner type, filling medium, and capping torque. Soft temper gives better forming reserve, while harder temper improves cap rigidity. Coated stock shortens converter processing time, while mill-finish stock gives printing plants more flexibility.
| Buying Need | Practical Recommendation |
|---|---|
| High cap output speed | Choose tight thickness tolerance and low-burr slit coil |
| Complex cap forming | Select O, H14, or H24 after tooling evaluation |
| Strong pilfer-proof band | Consider H16 with controlled yield strength |
| Premium printed caps | Request clean surface, coating test data, and color control |
| Food or pharma packaging | Confirm coating compliance documents before order |
| Long-distance export | Use moisture-proof seaworthy packaging |
Working with Haomei Aluminum CO., LTD., Inc.
Haomei Aluminum CO., LTD., Inc. supplies 8011 aluminum closure sheet in coil, strip, sheet, coated, and printed forms for global cap makers and packaging converters. Orders can be matched to cap drawings, coating requirements, printing designs, and machine feeding conditions. With stable alloy chemistry, accurate gauge control, reliable temper performance, and protective export packing, 8011 aluminum closure sheet becomes a practical material choice for closures that need clean appearance, dependable sealing, and smooth industrial processing.
