6xxx series aluminum coils are wrought aluminum alloys mainly alloyed with magnesium and silicon, which can be strengthened by heat treatment. They are among the most widely used aluminum alloy coils in modern industry. Featuring excellent machinability, corrosion resistance, weldability and moderate strength, these products are extensively applied in architectural decoration, transportation, electrical & electronic industries and general manufacturing. They meet forming and structural requirements for diverse scenarios, serving as practical and cost-effective aluminum raw materials.
Our 6xxx series aluminum coils are manufactured in strict compliance with China's GB/T 3880 and international ISO standards. Custom widths, thicknesses, surface finishes and alloy tempers are available. Our full range of specifications covers thickness from 0.2 mm to 10 mm and width from 100 mm to 2600 mm, suitable for slitting, leveling, stamping, bending and other downstream processing procedures.
Popular grades on the market include 6061, 6063, 6061-T6, 6063-T5, 6082 and 6005. Differences in alloy composition lead to varied performance and application ranges. The key composition and features of each grade are listed below:
|
Grade |
Main Alloy Content |
Core Characteristics |
|
6061 |
Mg: 0.8-1.2%, Si: 0.4-0.8%, Cu: 0.15-0.4%, Cr: 0.04-0.35% |
Medium-high strength, excellent machinability, good weldability and superior corrosion resistance. It is the most versatile and widely used grade in 6xxx series. |
|
6063 |
Mg: 0.45-0.9%, Si: 0.2-0.6%, Cu ≤ 0.1% |
Moderate strength and excellent ductility. Outstanding surface finishing performance with high luster after anodizing, ideal for architectural decoration. |
|
6082 |
Mg: 0.6-1.2%, Si: 0.7-1.3%, Mn: 0.4-1.0% |
Higher strength than standard 6061 and excellent resistance to stress corrosion cracking. Mainly used for structural components and transportation equipment. |
|
6005 |
Mg: 0.4-0.6%, Si: 0.6-0.9% |
Superior extrusion performance, relatively high strength and stable weldability. Suitable for large extruded parts and lightweight structures. |
Overall, magnesium and silicon are the primary alloying elements of 6xxx series. The formed Mg₂Si phase contributes largely to the material strength. By adjusting the ratio of magnesium to silicon and adding trace elements such as copper, manganese and chromium, we can balance strength, ductility and corrosion resistance to satisfy diverse application demands.
Stable Mechanical Properties
The mechanical properties of 6xxx series aluminum coils can be adjusted via heat treatment including quenching and aging. Different tempers fit varied load-bearing requirements:
O temper (annealed): Excellent ductility for deep drawing, bending and other heavy deformation processes.
T4 temper (natural aging): Balanced strength and ductility with high dimensional stability after forming.
T5 / T6 temper (artificial aging): High strength to meet the load requirements of structural parts.
The tensile strength ranges from 120 MPa to 350 MPa, covering a wide range of working conditions.
Excellent Corrosion & Weather Resistance
A dense protective aluminum oxide film naturally forms on the surface of 6xxx alloys. They deliver good corrosion resistance in atmospheric, fresh water, weak acid and weak alkali environments, and are highly resistant to pitting and intergranular corrosion. No obvious corrosion or cracking occurs after long-term outdoor service, making them ideal for coastal buildings and outdoor projects.
Compared with 2xxx and 7xxx series alloys, 6xxx series has stronger resistance to stress corrosion and rarely suffers corrosion fracture under long-term stress.
Superior Machinability & Surface Finishing Performance
With good ductility and cold working capacity, 6xxx coils can be easily bent, stamped, stretched and spun with low cracking rate and high yield. They also possess reliable weldability and work well with TIG welding, resistance welding and other common techniques, producing weld joints with stable strength.
In addition, the material is highly adaptable to anodizing, electrophoretic coating, PVDF spraying and powder coating. The finished surface features uniform luster and strong adhesion for premium decorative effects.
Eco-friendly & Recyclable
Aluminum alloy is 100% recyclable green metal. No toxic substances are added during production, fully complying with EU RoHS standards. Discarded products can be completely recycled and reused without environmental pollution, which conforms to the trends of green manufacturing and carbon neutrality.
Below are our standard specifications. Custom special sizes are available upon request:
Thickness: 0.2 mm - 10 mm, tolerance controlled within ±0.02 mm.
Width: 100 mm - 2600 mm. Full-coil supply or customized slitting service is provided.
Inner coil diameter: Standard 405 mm / 505 mm, adjustable to match customer equipment.
Available tempers: O, T4, T5, T6, H112 and more.
Surface types: Hot rolled finish, cold rolled finish, polished finish, film-protected finish, etc.
Architectural Decoration: Used for aluminum alloy doors & windows, curtain wall panels, indoor ceilings, integrated wall panels and sun visors. Benefiting from outstanding weather resistance and surface finishing performance, the products maintain stable appearance for decades and serve as mainstream materials in the construction industry.
Transportation: Applied to automotive body panels, container sheets, interior panels of rail carriages, decorative wall panels for ships and battery pack enclosures of new energy vehicles. The lightweight feature and reliable strength help reduce vehicle weight and cut costs.
Electrical & Electronic Industry: Manufactured into equipment housings, computer cases, heat sinks for communication base stations and brackets for photovoltaic backsheets. Good thermal & electrical conductivity and precise processability meet the demands of electronic manufacturing.
Industrial Processing: Used for molds, fixtures, engineering structural parts, pressure vessel plates and stamped hardware. With excellent workability and lower cost than high-grade 7xxx alloys, it combines economic efficiency and practicality.
Packaging: Thin-gauge 6xxx aluminum coils are used as base materials for food and pharmaceutical packaging foils. They comply with food contact safety standards and offer excellent sealing and moisture-proof performance.
We implement 12 strict quality inspection procedures throughout the whole production process, from raw material melting and casting to finished product delivery, including spectral composition analysis, mechanical property testing, surface defect detection, dimensional inspection and corrosion resistance testing. Quality inspection reports are available for every batch to ensure full compliance with national standards and customer requirements.
We also provide one-stop services including customized production, delivery and professional after-sales technical support. We offer professional suggestions on alloy tempers and specifications according to your processing scenarios, helping you raise product yield and reduce production costs.
