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Location: HOME > PRODUCTS > Aluminum / Aluminum Alloy > Aluminum/Aluminum Alloy Plate > 3003 / EN AW-300 Aluminum (Al-Mn) Alloy

3003 / EN AW-300 Aluminum (Al-Mn) Alloy

3003 / EN AW-3003 (AlMn1Cu) belongs to the 3000 series aluminum-manganese alloy family. It is the most widely used corrosion-resistant aluminum alloy; it cannot be strengthened by heat treatment and relies solely on work hardening (cold working) to increase strength. The addition of manganese enhances both strength and corrosion resistance—resulting in strength significantly higher than that of pure aluminum grades like 1060 and 1100—while offering good ductility and excellent performance in bending, stamping, deep drawing, and welding.

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Product Name：	Aluminum Plate
Diameter：	100–2600 mm; Standard (in stock): 1000 mm, 1219 mm, 1500 mm
Thickness：	0.2mm – 50mm (Common thin plates: 0.8 / 1.0 / 1.5 / 2.0 / 2.5 / 3.0 mm)
Length：	1000mm-8000mm or Can be cut to specified lengths.
Standard：	GB/T3190、GB/T3880；EN573-3、EN485；ASTM B209
Main Material：	1000 series, 2000 series, 3000 series, 5000 series, 6000 series, 7000 series, 8000 series
Surface：	mill finish, flat, smooth, stucco emboss(orange peel), corrugation
Processing Method：	Bending, Welding, Decoiling, Cutting, Punching.
Special Specifications：	Available according to customer’s requirements and quantity.
Packaging：	Standard seaworthy packaging or as customers’ requirements.
Delivery Time：	Within 10-20 working days after receipt the deposit payment.
Usage：	Construction filed, Ships building industry, Decoration,Industry,
Usage：	Manufacture,Machinery and hardware fields, etc

Chemical composition

Element	Si	Fe	Cu	Mn	Mg	Zn	Ti	Impurities	Al
Percentage (%)	≤0.60	≤0.70	0.05~0.20	1.00~1.50	≤0.05	≤0.10	≤0.05	≤0.15	Margin

Tolerance Requirements

Dimensional tolerances comply with EN485 / ASTM B209 standards; categories include standard commercial grade and high-precision industrial grade.

Commercial Grade: Allows for larger negative thickness tolerances; lower cost; suitable for general cladding, insulation, and substrates for color-coated aluminum.

High-Precision Industrial Grade: Strict tolerances for thickness, flatness, length, and width; full-item inspection with MTC (Material Test Certificate) provided; suitable for pressure vessel and heat exchanger projects.

Surface treatment

Common supply status (Temper)	O: Soft temper; high elongation; suitable for deep drawing and complex forming.
	H14 / H24: Half-hard; most common for export; balances strength and formability.
	H16 / H18: High hardness; suitable for flat sheets; prone to cracking during bending.

Advantages of 3003 Aluminum Alloy Sheet

1. Higher strength than 1000-series pure aluminum (1060/1100); offers superior rigidity at the same thickness and is resistant to deformation.

2. Excellent atmospheric corrosion resistance; suitable for long-term outdoor use and resistant to moisture.

3. Good formability; exhibits excellent performance in bending, deep drawing, stamping, and welding.

4. Highly suitable as a substrate for pre-painting or color coating, offering stable coating adhesion.

5. Abundant supply; offers a cost-performance ratio falling between pure aluminum and 5052 alloy.

Limitations/Drawbacks

1. Anodized finish is mediocre; not suitable for decorative anodized parts requiring high aesthetic quality.

2. Resistance to seawater and strong acids/alkalis is inferior to that of 5052 or 5083 alloys.

3. Cannot be strengthened by heat treatment; strength cannot be further enhanced through quenching.

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

Previous:5083 / EN AW-5083 High-Strength Aluminum-Magnesium Alloy Plate

Next:5754 / EN AW-5754 Al-Mg Alloy Sheet

Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method