1050 Aluminum Disc – High-purity Pressed Pure Aluminum Disc

1050 aluminum circles belong to the high-purity industrial pure aluminum series (aluminum content ≥99.5%). Their core advantages are excellent ductility, thermal/electrical conductivity, and surface finish. They contain no alloy strengthening elements; mechanical properties are regulated through cold working and annealing processes, making them easy to process via stamping, bending, and anodic oxidation.

Compared to alloy aluminum circles, 1050 pure aluminum circles have lower costs, are non-toxic and odorless, and are suitable for scenarios such as shallow stamping and heat dissipation. Henan Huawei Aluminum Co., Ltd. has specialized in the R&D, production, and global export of 1050 aluminum circles for 15 years. Products comply with international standards such as ASTM, EN, and GB, and are exported to Europe, America, Southeast Asia, and the Middle East, accurately meeting needs in food packaging, electronic thermal conductivity, and general decoration. Detailed core product information follows:

I. Export Specification Data Table for 1050 Aluminum Circles

This specification table covers mainstream global export scenarios, supporting small-diameter precision cutting, large-size full-plate processing, and special surface treatment customization. Each batch includes a Certificate of Analysis (COA) and third-party test reports.

Item	Parameter Range	Common Specifications	Tolerance Standard	Executive Standard	Remarks
Diameter	30mm – 1000mm	50mm, 80mm, 150mm, 200mm, 300mm, 500mm, 800mm	≤200mm: ±0.08mm; 201-600mm: ±0.15mm; >600mm: ±0.25mm	ASTM B209, EN 573-1, GB/T 3880.1	Small diameters (<50mm) use precision CNC cutting with no burrs.
Thickness	0.2mm – 4.0mm	0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2.0mm	≤0.8mm: ±0.015mm; 0.9-2.0mm: ±0.02mm; >2.0mm: ±0.04mm	ASTM B479, JIS H 4000	Thickness uniformity ≤0.008mm/m² to avoid wrinkling in thin materials.
Flatness	≤0.4mm/m	≤0.2mm/m (Precision), ≤0.4mm/m (General)	–	ASTM B598	Precision grade ensures uniform fit and heat dissipation for electronics.
Temper	O (Annealed), H14 (Half-hard), H16, H18 (Full-hard)	O (Stamping/Forming), H14 (Decoration), H18 (Structural)	–	EN 485, ASTM B109	O-temper ductility is best; annealing temperature (350-400°C) is customizable.
Surface Treatment	Mill Finish, Bright, Food-grade No-oil/Oiling, Passivation, Anodic Oxidation Pretreatment	Food-grade no-oil (packaging), Anodic oxidation pretreatment (decoration)	–	FDA 21 CFR 175.300, EN 16610	Pure aluminum provides uniform color after anodizing (silver, champagne, etc.).
Unit Weight	0.01kg – 10kg/piece	0.04kg (φ50×0.3mm), 0.66kg (φ200×1.0mm)	±2%	General industry standard	Batch weight error ≤1%; supports splitting weight specifications.
Packaging	Fumigation-free wooden cases, EPE cotton spacers, moisture-proof film, PE bags	Layered stacking, ≤1.5 tons/case, ≤600 pcs (thin) / 300 pcs (thick)	–	ISTA 3A Standard	Thin materials (<0.5mm) include extra rigid lining boards to prevent scratches.

II. Classification and Corresponding Parameters of 1050 Aluminum Circles

1050 aluminum circles are divided into four categories focusing on high ductility and thermal conductivity:

Category Name	Core Parameters	Surface Treatment	Suitable Temper	Key Characteristics	Typical Uses
1050 Food Packaging Grade	Dia 30-300mm, Thickness 0.2-1.0mm, Elongation ≥20% (O)	Food-grade no-oil/mineral oil, heavy metal leaching ≤0.05mg/dm²	O, H14	Excellent shallow stamping, non-toxic, odorless	Food can lids, shallow lunch boxes, foil trays, thermos flask gaskets
1050 Electronic Thermal Grade	Dia 50-200mm, Thickness 0.5-2.0mm, Thermal Conductivity ≥230W/(m·K)	High-precision degreasing, passivation, Ra≤0.5μm	O, H16	Uniform heat conduction, stable conductivity, efficiency 15-20% higher than alloys	Device heatsinks, shielding covers, capacitor bases, LED lamp thermal plates
1050 Decorative General Grade	Dia 100-1000mm, Thickness 0.8-2.5mm, Color diff ≤ΔE2.0	Anodic oxidation pretreatment, primer coating, oxide film ≥10μm	H14, H24	Good anodizing effect, uniform color, easy to color	Ceiling discs, nameplates, furniture decorations, craft bases
1050 Precision Instrument Grade	Dia 30-150mm, Thickness 0.3-1.5mm, Flatness ≤0.15mm/m	Ultra-precision degreasing, Ra≤0.5μm, Class 1000 cleanliness	O, H18	Highly precise, uniform texture, no magnetic interference	Instrument pointer bases, sensors, medical micro-accessories

III. Core Performance of 1050 Aluminum Circles

1050 aluminum circles use high-purity aluminum as the substrate (Al ≥ 99.5%) with extremely low impurity content. The optimal balance of ductility, thermal conductivity, and processing performance is achieved through precise annealing processes.

Performance Category	Performance Index	Specific Value	Test Standard	Performance Advantage Description
Chemical Performance	Chemical Composition (Mass Fraction)	Al: ≥99.50%; Fe: ≤0.40%; Si: ≤0.25%; Cu: ≤0.05%; Zn: ≤0.05%; Others: Individual ≤0.03%, Total ≤0.50%	ASTM B209, GB/T 3880.2	High purity ensures excellent ductility and thermal conductivity; low impurities avoid stamping cracks and color differences.
	Corrosion Resistance (Salt Spray Test)	≥72 hours without obvious corrosion (≥120 hours after passivation)	ASTM B117	Natural oxide film protects in dry environments; not for humid/acid-base environments unless passivated.
	Food Grade Safety	Pb <0.02mg/kg, Cd <0.01mg/kg, no heavy metal migration	FDA 21 CFR 175.300, EC 1935/2004	Odorless and non-toxic; direct contact with hot/cold food; suitable for packaging and tableware.
	Temperature Stability	Long-term: -20℃ ~ 100℃, Short-term: ≤150℃ (no deformation)	ASTM E794	Suitable for food storage and electronics heat dissipation; prone to softening at high temperatures.
Physical Performance	Density	2.70g/cm³	ASTM D792	Lighter than steel and slightly lighter than 3003 alloy; improves assembly and transport efficiency.
	Thermal Conductivity	237W/(m·K) (Room temp, O-temper)	ASTM D5470	Performance far exceeds 3003 and 5052 alloys; preferred material for electronic thermal parts.
	Electrical Conductivity	≥60% IACS (O-temper), H18 ≥58% IACS	ASTM B193	Excellent conductivity; suitable for electromagnetic shielding and precision instruments.
	Surface Roughness	Mill: Ra≤1.0μm, Bright: Ra≤0.8μm, Precision: Ra≤0.5μm	ASTM B499	Flat and smooth surface; easy for subsequent processing like anodizing and coating.
Mechanical Performance	Tensile Strength	O: 75-110MPa; H14: 120-150MPa; H16: 150-180MPa; H18: ≥180MPa	ASTM E8	Lower strength than alloy aluminum but much higher ductility; adapts to forming and structural needs.
	Elongation (A50mm)	O-temper: ≥20%	ASTM E8	Excellent ductility; enables shallow stamping (depth ≤ 1/4 diameter), bending, and flanging.

IV. Application Fields of 1050 Aluminum Circles

Relying on high purity, excellent ductility, and strong thermal conductivity, 1050 aluminum circles are widely used in several key areas:

Food Packaging Field: Shallow-stamped containers like can lids, lunch boxes, foil trays, and candy packaging. They comply with global food safety standards and are exported to supermarkets and food plants worldwide.
Electronic and Electrical Field: Heatsinks for LEDs and electronic devices, capacitor bases, and electromagnetic shielding covers. Their high thermal conductivity [237W/(m·K)] quickly dissipates heat to extend device life.
Indoor Decoration Field: Ceiling discs, nameplates, furniture decorations, and craft bases. They provide uniform color after anodizing (silver, champagne, bronze, etc.) with strong coating adhesion.
Precision Instruments and Medical Field: Instrument pointer bases, sensor accessories, and medical disinfection box linings. They are non-magnetic and easy to clean, suitable for sterile environments (dry indoor use only).

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 high-purity aluminum circles, foil, and alloy products. With 15 years of experience in 1050 pure aluminum circles, we serve over 60 countries.

Equipment Strength: We use high-purity ingots (Al ≥ 99.7%) and operate 12 production lines, including CNC cutting machines and automatic annealing furnaces (precision ±5℃). Annual capacity for pure aluminum circles is 25,000 tons.
Quality Control: Certified by ISO 9001, ISO 22000, FDA, and SGS. Equipped with spectrum analyzers (0.01% purity precision) and tensile testers, we keep the non-conformity rate below 0.02%.
R&D Capability: Our 18-person technical team holds patents for “Precision Cutting of High-Purity Aluminum Circles” and “Food-Grade Surface Degreasing.”
Green Production: We maintain a 98% aluminum scrap recycling rate and use low-carbon melting processes with no harmful additives.
Service System: We provide one-on-one account managers, English communication, and assistance with customs documents (COA, PL, CI, etc.), with a 98% customer satisfaction rate.

VI. Transport and Logistics Advantages

Given that 1050 pure aluminum circles are relatively soft and prone to scratches or deformation, we have customized exclusive transport solutions to ensure safe and efficient delivery:

Customized Protective Packaging: Export-grade fumigation-free wooden cases + layered EPE foam spacers + outer moisture-proof plastic film wrapping. Thin-gauge circles (<0.5mm) are fitted with extra rigid lining boards and corner protectors. Complies with ISTA 3A standards; transport damage rate is below 0.1%.
Diversified Logistics Channels: Long-term cooperation with MAERSK, COSCO, and express carriers like DHL/FedEx. We offer sea freight, air freight (72-hour delivery for urgent orders), and China-Europe Railway Express.
Convenient Port Clearance: Proximity to Tianjin, Qingdao, and Ningbo ports. We provide one-stop door-to-door services, including customs declaration, clearance (with purity and food-grade reports), and overseas delivery.
Flexible Inventory: Regular specifications (Dia 50-500mm, Thickness 0.3-1.5mm) are in stock for 3-7 day shipping. Large orders support batch delivery to reduce customer capital pressure.

VII. Comparison: 1050 vs. Other Alloy Grades

Comparison Item	1050 Aluminum Circle	1060 Aluminum Circle	1235 Aluminum Circle	3003 Aluminum Circle	5052 Aluminum Circle
Alloy Type	High-purity Pure Al	Ultra-high purity Al	Food-grade Pure Al	Al-Mn Alloy	Al-Mg Alloy
Tensile Strength	75-180 MPa	75-185 MPa	70-110 MPa	80-220 MPa	190-260 MPa
Thermal Cond.	237 W/(m·K)	239 W/(m·K)	230 W/(m·K)	201 W/(m·K)	125 W/(m·K)
Corrosion Res.	★★★☆☆	★★★☆☆	★★★☆☆	★★★★★	★★★★★
Cost Level	Lower	Medium-Low	Lower	Medium	High
Processing	Excellent ductility	Similar to 1050	Good shallow stamp	Balanced	High difficulty

VIII. Actual Case Studies

Case 1: SE Asia Food Packaging Plant (Lunch Box Project)
- Requirement: Dia 120mm, 0.5mm, O-temper. Needs FDA compliance, elongation ≥20%, and burr-free edges for 6,000 tons/year.
- Solution: Used Al≥99.6% ingots, optimized annealing for 22% elongation, and rigid lining board packaging.
- Result: 99.9% pass rate with no cracking or wrinkling. Volume increased to 8,000 tons/year.
Case 2: Domestic Electronics Manufacturer (Heatsink Gasket Project)
- Requirement: Dia 80mm, 1.0mm, H14-temper. Thermal conductivity ≥235W/(m·K), flatness ≤0.2mm/m for exports to Europe/USA.
- Solution: Precise temperature control during annealing; high-precision degreasing for thermal silicone adhesion.
- Result: Heat dissipation efficiency improved by 18% compared to common alloy gaskets.
Case 3: European Decoration Company (Anodized Nameplate Project)
- Requirement: Dia 200mm, 1.2mm, H14-temper. Uniform color after anodizing, flatness ≤0.3mm/m.
- Solution: Strict impurity control to avoid spots after anodizing; pre-treatment to enhance film adhesion.
- Result: Color uniformity ΔE≤1.5. Successfully applied in high-end hotel and mall projects.

IX. Frequently Asked Questions (Q&A)

1. Why is 1050 aluminum suitable for electronic thermal conductivity?

With purity ≥99.5% and low impurities, its thermal conductivity [237W/(m·K)] far exceeds alloys like 3003 or 5052. Its excellent flatness (≤0.2mm/m) ensures a perfect fit for heat dissipation.

2. 1050 vs. 1060: Which one to choose?

1050 (Al≥99.5%) is the cost-effective, general-purpose choice for most packaging and electronics. 1060 (Al≥99.6%) is slightly more expensive (5-8%) and reserved for ultra-high precision instruments or high-end decoration.

3. Is it rust-proof enough for outdoor use?

Pure aluminum is excellent for dry indoor environments but inferior to alloys in humid or coastal areas (where it may blacken). For outdoor use, choose 3003 or 5052.

4. What is the MOQ?

Regular specifications: 2 tons. Custom specifications: 5 tons. Long-term partners can negotiate down to 1 ton. Sample orders (≤500kg) can be expedited.

5. How do you prevent deformation of thin circles during transport?

We use “rigid lining boards + EPE foam + corner protectors” and limit case weight to 1.5 tons to prevent pressure damage.

6. Is it suitable for deep or shallow stamping?

It is ideal for shallow stamping (depth ≤ 1/4 diameter). Because of its low strength, if you need deep drawing (depth > 1/3 diameter), we recommend choosing 3003 alloy