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3003 is an Al-Mn series, non-heat-treatable, corrosion-resistant aluminum alloy. With manganese as the primary alloying element, it offers higher strength than 1xxx-series pure aluminum, while maintaining good ductility, excellent atmospheric corrosion resistance, and superior weldability. Its strength cannot be enhanced through quenching and aging; instead, hardness can only be increased via cold working (strain hardening). It possesses good thermal conductivity, though it tends to be "sticky" during machining (prone to adhesion to cutting tools). Common supply tempers include O (annealed/soft) and H112; the density is 2.73 g/cm³.
Key comparisons: 3003 has higher strength than 1060/1070; it offers excellent corrosion resistance and is well-suited for welding, deep drawing, and the fabrication of fluid-containment components. It is not, however, suitable for parts subject to heavy structural loads.
Chemical composition
Applicable Standards
Chinese National Standard (GB): GB/T 3191-2019 "Extruded bars of aluminium and aluminium alloys"; chemical composition per GB/T 3190
American Standard (ASTM): ASTM B221
European Standard (EN): EN AW-3003 (AlMn1Cu), EN 573-3
Specifications + Standard Stock Sizes
Shapes: Round bars (primary), square bars, hexagonal bars
Temper/Condition: O, H112 (T6/T651 not available; non-heat-treatable)
Tolerances: Standard extrusion tolerances / high-precision tolerances for machined (turned/bright) bars
Mechanical properties
Applications
1. Fluid containers: Fuel tanks, lubricating oil pipelines, and blanks for atmospheric-pressure liquid storage tanks.
2. HVAC and heat exchange: Components for air-conditioning evaporators, radiators, and heat exchangers.
3. Chemical and anti-corrosion applications: Storage equipment for food or chemicals, and corrosion-resistant pipe fittings.
4. Signage and decoration: Nameplates, signs, and outdoor decorative elements.
5. General welded components: Non-load-bearing structural parts that require welding and resistance to atmospheric corrosion.
6. Kitchenware and equipment: Food processing equipment and blanks for kitchenware.
Caution: Due to its limited strength, this material is not suitable for high-load structural applications. It is also not recommended for environments with severe seawater corrosion (5083 alloy is preferred in such cases).
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.
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.
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
Fumigation-free plywood boxes
Steel strapping/bottom pallet
Vacuum/VCI Rust-Proof Paper
Steel plate frame reinforcement
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