3003 aluminum round sheet – Special aluminum round sheet for stamping processing

The 3003 aluminum circle is the core representative product of the Al-Mn alloy series, with 1.0%-1.5% manganese as the main alloying element. Compared to pure aluminum circles, its strength is increased by more than 30%. It combines excellent rust and corrosion resistance, good deep-drawing formability, and uniform mechanical properties. It has no heat treatment strengthening characteristics; performance is regulated through cold working and annealing processes. Henan Huawei Aluminum Co., Ltd. has specialized in the R&D, production, and global export of 3003 aluminum circles for 15 years. The products comply with international standards such as ASTM, EN, and GB, accurately adapting to the stamping processing needs of food containers, hardware accessories, architectural decoration, and other fields. Detailed core product information follows:

I. Export Specification Data Table for 3003 Aluminum Circles

This specification table covers mainstream global export scenarios and supports customization for large diameters, thick specifications, and special precision. Each batch of products is accompanied by a Certificate of Analysis (COA) and a third-party testing report to ensure cross-regional compliance and compatibility with automated stamping production lines.

Item	Parameter Range	Common Specifications	Tolerance Standard	Executive Standard	Remarks
Diameter	50mm – 1200mm	100mm, 150mm, 200mm, 300mm, 500mm, 800mm, 1000mm	Dia ≤300mm: ±0.1mm; Dia 301-800mm: ±0.2mm; Dia >800mm: ±0.3mm	ASTM B209, EN 573-3, GB/T 3880	Large diameters (>800mm) use full-plate cutting to avoid splicing and ensure flatness.
Thickness	0.3mm – 5.0mm	0.5mm, 0.8mm, 1.0mm, 1.2mm, 2.0mm, 3.0mm	Thickness ≤1.0mm: ±0.02mm; 1.1-3.0mm: ±0.03mm; >3.0mm: ±0.05mm	ASTM B479, JIS H 4000	Thickness uniformity ≤0.01mm/m², suitable for high-precision stamping.
Flatness	≤0.5mm/m	≤0.3mm/m (Precision), ≤0.5mm/m (General)	–	ASTM B598	Precision grade is used for electronic components and instrument parts to avoid stamping deformation.
Temper	O (Annealed), H14, H16, H22, H24 (Half-hard), H18 (Full-hard)	O (Food containers), H24 (Hardware), H18 (Structural parts)	–	EN 485, ASTM B109	Annealing process can be customized to adjust hardness and plasticity for different stamping difficulties.
Surface Treatment	Mill Finish, Bright, Food-grade Oiling, Passivation, Anodic Oxidation Pretreatment, Primer Coating	Food-grade oiling (containers), Passivation (rust prevention), Mill Finish (general use)	–	FDA 21 CFR 175.300, EN 16610	Oiling uses food-grade mineral oil, washable upon request, no odor migration.
Unit Weight	0.03kg – 15kg/piece (Calculated by dia/thickness)	0.1kg (φ100×0.5mm), 0.94kg (φ200×1.0mm), 3.53kg (φ300×1.2mm)	±2%	General industry standards	Batch weight error ≤1%, convenient for customer cost accounting and inventory management.
Packaging	Export fumigation-free wooden cases, layered spacers (EPE/Pearl cotton), moisture-proof plastic film wrapping, independent PE bag sealing	Layered stacking by diameter, ≤2 tons per case, ≤500 pieces per case	–	ISTA 3A transport standard	Corner protectors added to prevent bumping deformation during transport; suitable for sea and China-Europe freight trains.

II. Classification of 3003 Aluminum Circles and Corresponding Parameters

3003 aluminum circles are divided into four categories based on use, precision level, and processing needs. Each category has optimized core parameters to address specific application pain points:

Category Name	Core Parameters	Surface Treatment	Suitable Temper	Key Characteristics	Typical Uses
3003 Food Container Circle	Dia 50-300mm, thickness 0.3-1.2mm, elongation ≥12% (O), flatness ≤0.3mm/m, no impurities/spots	Food-grade oiling / No oil, surface cleanliness Ra≤0.8μm, no oxidation color difference	O, H14	Excellent deep drawing, no odor migration, meets food contact standards, stamping pass rate ≥99.8%	Foil container lids, baking trays, food can bottoms/lids, disposable tableware substrates
3003 Hardware Accessory Circle	Dia 80-800mm, thickness 1.0-3.0mm, tensile strength ≥170MPa (H24), hardness HB≥45	Passivation, Mill finish, some phosphating for improved wear resistance	H24, H16	Strong rust resistance, anti-deformation, wear resistance; suitable for bending, stamping, riveting	Hardware gaskets, mechanical covers, valve accessories, automotive parts (heat shields, trim)
3003 Architectural Decoration Circle	Dia 200-1200mm, thickness 0.8-2.0mm, flatness ≤0.4mm/m, color difference ≤ΔE2.0	Anodic oxidation pretreatment, primer coating, customizable matte/bright effects	H22, H24	Excellent weather resistance, easy to color, flat appearance, suitable for long-term outdoor use	Ceiling discs, curtain wall decorations, signage, guardrail decorative pieces
3003 Electronic Component Circle	Dia 30-200mm, thickness 0.5-1.0mm, flatness ≤0.2mm/m, pinhole count ≤1/m², no oil stains	High-precision degreasing, passivation, surface roughness Ra≤0.5μm, no scratches	O, H18	Stable conductivity, high dimensional accuracy, excellent cleanliness, suitable for precision electronic assembly	Electronic device shells, shielding covers, capacitor bases, instrument accessories

III. Core Performance of 3003 Aluminum Circles

By precisely controlling manganese content and annealing processes, 3003 aluminum circles achieve a balanced fit of rust resistance, mechanical properties, and stamping performance.

1. Chemical and Physical Performance

Performance Category	Performance Index	Specific Value	Test Standard	Performance Advantage Description
Chemical Performance	Chemical Composition (Mass Fraction)	Al: Remainder; Mn: 1.00-1.50%; Si≤0.60%; Fe≤0.70%; Cu: 0.05-0.20%; Zn≤0.10%; Others: Individual ≤0.05%, Total ≤0.15%	ASTM B209, GB/T 3190	Manganese forms Al6Mn strengthening phase, enhancing rust resistance and strength; low impurity ensures no cracking during stamping.
	Corrosion Resistance (Salt Spray Test)	≥120 hours without obvious corrosion (≥200 hours after passivation)	ASTM B117	Superior to pure aluminum; suitable for humid, outdoor, and food contact scenarios; not easy to oxidize or blacken.
	Food Grade Safety	Pb <0.02mg/kg, Cd <0.01mg/kg, Heavy metal leaching ≤0.05mg/dm²	FDA 21 CFR 175.300, EC 1935/2004	Can directly contact hot/cold food; no metallic taste migration; passed global mainstream food grade certifications.
Physical Performance	Density	2.73g/cm³	ASTM D792	Lighter than steel; reduces end-product weight and improves transport/assembly efficiency.
	Thermal Conductivity	201W/(m·K) (at room temp)	ASTM D5470	Uniform heat conduction; suitable for food baking and equipment heat dissipation to avoid local deformation.
	Electrical Conductivity	30% IACS	ASTM B193	Good electromagnetic shielding performance; meets basic conductivity needs for electronic components.
	Surface Roughness	Mill: Ra≤1.2μm, Bright: Ra≤0.8μm, Precision: Ra≤0.5μm	ASTM B499	Smooth surface; suitable for oiling, spraying, anodic oxidation, and other subsequent processes.

2. Mechanical Performance

Performance Category	Tensile Strength	Elongation (A50mm)	Performance Advantage Description
O Temper	80-140 MPa	≥12%	Excellent plasticity; enables deep stamping (depth ≥ 1/3 diameter) without cracking or wrinkling.
H14 Temper	140-170 MPa	–	Balanced strength and plasticity for general stamping.
H24 Temper	170-200 MPa	≥5%	Suitable for medium-difficulty stamping and bending processes.
H18 Temper	≥220 MPa	–	Highest strength; 30% higher than 1235 pure aluminum; suitable for structural support.

IV. Application Fields of 3003 Aluminum Circles

Relying on excellent rust resistance, balanced mechanical properties, and wide stamping adaptability, 3003 aluminum circles have penetrated many industries such as food packaging, hardware manufacturing, architectural decoration, and electronic appliances, becoming a core stamping substrate for high-end manufacturing and civil sectors:

1. Food Packaging Field

Kitchenware Substrates: Foil container lids, baking trays, cake molds, disposable food can bottoms/lids. Using O-temper 3003 circles, they offer excellent deep-drawing performance, no odor migration, and can withstand baking at 120°C and refrigeration at -40°C. They comply with global food contact standards and are widely exported to supermarkets in Europe, America, and Southeast Asia.
Beverage Packaging: Small beverage can lids, thermos flask liner gaskets. Strong rust resistance prevents beverage oxidation; surface oiling treatment improves sealing performance, adapting to automated sealing equipment.

Newly manufactured 3003 aluminum round sheet

2. Hardware and Machinery Field

Hardware Accessories: Mechanical gaskets, valve covers, bearing dust covers, toolbox accessories. Using H24-temper circles, they provide high strength and anti-deformation properties. After passivation, they adapt to humid industrial environments, with a service life 50% longer than pure aluminum circles.
Automotive Parts: Engine bay heat shields, body trim parts, interior buckle substrates. Lightweight characteristics improve fuel economy; they are rust-proof and temperature-resistant, adapting to long-term automotive operating conditions.

3. Architectural Decoration Field

Decorative Components: Ceiling discs, curtain wall decorations, outdoor signage, guardrail decorative pieces. Various colors can be achieved through anodic oxidation or spraying. They offer excellent weather resistance and are not prone to fading or oxidation in high-temperature or humid environments.
Insulation Accessories: Building pipe insulation covers, vent decoration rings. Uniform heat conduction, rust-proof, and moisture-proof; they adapt to building exterior walls and pipe insulation systems, improving overall aesthetics.

4. Electronic and Electrical Field

Electronic Components: Electronic device shells, electromagnetic shielding covers, capacitor bases, instrument accessories. Using precision-grade circles, they offer high dimensional accuracy, clean surfaces, and stable conductivity, adapting to precision electronic assembly processes.
Home Appliance Accessories: Small appliance bases, control panel decoration rings, radiator gaskets. Lightweight and easy to process, they can be accurately matched with plastic and hardware parts to improve the texture of home appliances.

V. Introduction to Henan Huawei Aluminum Co., Ltd.

Henan Huawei Aluminum Co., Ltd. is a high-tech enterprise focusing on the R&D, production, and global export of Al-Mn and Al-Mg alloy circles and aluminum foil. Deeply rooted in the 3003 aluminum circle field for 15 years, with strict quality control, advanced CNC processing equipment, and efficient cross-border supply chain capabilities, our products are exported to 60+ countries and regions in Europe, America, Southeast Asia, the Middle East, and Africa. We have become a trusted core supplier for overseas food container factories, hardware manufacturers, and architectural decoration enterprises.

Core Competitive Advantages

Capacity and Equipment Strength: We have 3 modern production bases equipped with 15 lines of imported CNC cutting machines, high-precision grinders, fully automatic annealing furnaces, passivation lines, and flatness testing equipment. Annual capacity reaches 80,000 tons (including 30,000 tons for aluminum circles). We achieve autonomous production from aluminum ingot melting, casting-rolling, plate-strip rolling, and CNC cutting to surface treatment and finished packaging. Delivery cycles for regular specifications are 7-15 days, and 20-30 days for large custom orders.
Quality Certification and Control: We have passed ISO 9001, ISO 22000, FDA, REACH, RoHS, and SGS international certifications. We have established a full-process quality inspection system using professional equipment such as thickness gauges, tensile testers, salt spray testers, and surface roughness meters. The non-conformity rate is controlled below 0.02%. Each batch is provided with a COA and third-party test reports.
R&D and Customization: We have an alloy circle R&D laboratory and a core technical team of 20 people. We can customize 3003 aluminum circles with special diameters, thicknesses, precision, and tempers according to customer needs to optimize stamping performance and rust resistance.
Green Production: We use low-carbon melting processes, and our aluminum scrap recycling rate reaches over 98%. No harmful additives are used in the production process, meeting global green packaging and industrial environmental trends.
Customer Service System: We have a professional foreign trade team and one-on-one account managers. We provide full-process services including English communication, sample delivery, and logistics tracking, and assist customers in preparing customs clearance documents (Commercial Invoice, Packing List, COA, etc.).

VI. Transport and Logistics Advantages

Relying on Henan’s superior geographical location and a mature cross-border logistics cooperation system, we provide efficient, safe, and low-cost transport solutions for 3003 aluminum circles, comprehensively solving pain points such as deformation, moisture, and complex customs clearance:

Customized Packaging Protection: Uses export-grade fumigation-free wooden cases + layered EPE foam spacers + outer moisture-proof plastic film wrapping. Circle edges are fitted with hard paper corner protectors, and precision-grade products are equipped with extra shock-absorbing layers. Complies with ISTA 3A standards; transport damage rate is below 0.1%.
Diversified Logistics Channels: Long-term cooperation with MAERSK, COSCO, HPL, and express carriers like DHL and FedEx. We offer sea freight, air freight (72-hour delivery to core cities for urgent orders), and China-Europe Railway Express (cost-optimized).
Convenient Port Clearance: Proximity to Tianjin, Qingdao, and Ningbo ports ensures high efficiency. We provide door-to-door one-stop services, covering customs declaration, clearance, and overseas delivery.
Flexible Inventory: Regular specifications (Dia 50-500mm, Thickness 0.5-2.0mm) are in stock for 3-7 day fast shipping. Large orders support batch delivery to ease customer capital and inventory pressure.

VII. Comparison: 3003 vs. Other Alloy Grades

Comparison Item	3003 Aluminum Circle	1235 Pure Aluminum	8011 Alloy	3004 Alloy	5052 Alloy
Alloy Type	Al-Mn Series	Industrial Pure Al	Al-Fe-Si Series	Al-Mg-Mn Series	Al-Mg Series
Tensile Strength	80-220 MPa	70-110 MPa	110-180 MPa	150-280 MPa	190-260 MPa
Corrosion Resistance	★★★★☆	★★★☆☆	★★★☆☆	★★★★★	★★★★★
Cost Level	Medium (High ROI)	Lower	Medium	Higher	High
Processing	Easy deep drawing	Best deep drawing	Good general	Excellent deep drawing	High difficulty
Typical Use	Food containers	Simple packaging	General hardware	High-end cans	Marine/Industrial

VIII. Actual Case Studies

Case 1: European Food Container Manufacturer (Lid Project)
- Requirement: Dia 150mm, 0.5mm thickness, O-temper for disposable lids. Needs to meet EU/FDA standards and deep draw 25mm without cracking.
- Solution: Optimized annealing for 13% elongation; food-grade mineral oil coating; specialized packaging for automated lines.
- Result: 99.9% pass rate. Successfully entered mainstream European supermarket supply chains.
Case 2: Middle East Hardware Manufacturer (Gasket Project)
- Requirement: Dia 80mm, 1.0mm thickness, H24-temper. Strength ≥180MPa, salt spray resistance ≥200 hours for high-humidity environments.
- Solution: Cold-work hardening with trivalent chromium passivation. Delivered via China-Europe Railway Express.
- Result: No oxidation after 1 year of use. Customer increased annual volume to 8,000 tons.

Measurement of 3003 aluminum round sheet

IX. Frequently Asked Questions (Q&A)

1. Why is 3003 aluminum suitable for stamping?

The 1.0%-1.5% manganese content allows for balanced hardness and plasticity. O-temper elongation (≥12%) enables deep drawing (depth ≥ 1/3 diameter) without cracking. High thickness uniformity (≤0.01mm/m²) ensures even stress during stamping.

2. How to choose between different tempers?

O (Annealed): Best plasticity for complex/deep drawing (e.g., deep containers).
H22/H24 (Half-hard): Balanced strength for medium stamping/bending (e.g., gaskets, decor).
H18 (Full-hard): Highest strength for structural parts with no deformation (e.g., shields).

3. What is the Minimum Order Quantity (MOQ)?

Regular specifications: 3 tons per size. Custom specifications: 5 tons. For long-term partners, we can negotiate down to 2 tons. Small sample orders (≤500kg) can be specially arranged.

4. How do you handle shipping damage or scratches?

Our damage rate is <0.1%. If damage occurs, provide photos and documents within 72 hours. We will verify and offer free replacements or a discount, then optimize packaging for future shipments.

5. 3003 vs. 3004: Which one to choose?

Choose 3003 for a balance of cost, rust resistance, and general stamping. Choose 3004 if you need significantly higher strength and extreme deep-drawing performance (cost is 15-20% higher).

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Properties of the aluminum circle:

Aluminum circle is suitable for many markets, including cookware, automotive and lighting industries, etc., thanks to good product characteristics:

Low anisotropy, which facilitates deep drawing
Strong mechanical properties
High and homogeneous heat diffusion
Ability to be enameled, covered by PTFE (or others), anodized
Good reflectivity
High strength-to-weight ratio
Durability and resistance to corrosion

Aluminum Circles Process

Ingot/Master Alloys — Melting Furnace – Holding Furnace — D.C. Caster — Slab —- Scalper — Hot Rolling Mill – Cold Rolling Mill – Punching – Annealing Furnace — Final Inspection – Packing — Delivery

Prepare the master alloys
Melting furnace: put the alloys into the melting furnace
D.C.cast aluminum ingot: To make the mother ingot
Mill the aluminum ingot: to make the surface and side smooth
Heating furnace
Hot rolling mill: made the mother coil
Colding rolling mill: the mother coil was rolled as the thickness you want to buy
Punching process: become the size what you want
Annealing furnace: change the temper
Final inspection
Packing: wooden case or wooden pallet
Delivery

Quality Control

Assurance Below inspection will be done in the production.

a. ray detection—RT;
b. ultrasonic testing—UT;
c. Magnetic Particle Testing-MT;
d. penetration testing-PT;
e. eddy current flaw detection-ET

1) Be free from Oil Stain, Dent, Inclusion, Scratches, Stain, Oxide Discoloration, Breaks, Corrosion, Roll Marks, Dirt Streaks, and other defects which will interfere with use.

2) Surface without black line, clean-cut, periodic stain, roller printing defects, such as other gko internal Control standards.

Aluminum discs packing:

Aluminum circles can be packed by export standards, covering with brown paper and plastic film. Finally, the Aluminium Round is fixed on a wooden pallet/wooden case.

Put the driers side the aluminum circle, keep the products dry and clean.
Use clean plastic paper, pack the aluminium circle, keep good sealing.
Use the snakeskin paper, pack the surface of the plastic paper, keep good sealing.
Next, there are two ways of packaging: One way is wooden pallet packaging, using the crusty paper packing the surface; Another way is wooden case packaging, using the wooden case packing the surface.
Finally, lay the steel belt on the wooden box’s surface, keeping the wooden box fastness and secure.

Aluminum circle of Henan Huawei Aluminum. meet the export standard. Plastic film and brown paper can be covered at customers’ needs. What’s more, a wooden case or wooden pallet is adopted to protect products from damage during delivery. There are two kinds of packaging, which are eye to wall or eye to the sky. Customers can choose either of them for their convenience. Generally speaking, there are 2 tons in one package, and loading 18-22 tons in 1×20′ container, and 20-24 tons in 1×40′ container.

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Why choose us?

In order to move with the times, HWALU keeps introducing the state of the art equipment and technique to improve its competitiveness. Always adhere to the business philosophy of quality as the center and customer first, to provide the highest quality aluminum disc circle series products to all parts of the world. More …

3003 aluminum round sheet – Special aluminum round sheet for stamping processing