When sourcing metal materials for general industrial use, construction, or manufacturing, the 3003 H14 aluminum sheet is one of the most common and reliable choices globally. It is the most widely used alloy in the 3xxx series family.
Buyers prefer this material because it offers an excellent balance: it is stronger than pure commercial aluminum, highly resistant to rust, easy to bend, and very cost-effective. Whether you are building roofing panels, manufacturing HVAC ducts, or fabricating fuel tanks, understanding the core specifications of 3003 H14 will help you make the right purchasing decision and control your project budget.
Need a reliable supply of 3003 H14 aluminum sheets for your production line? GNEE is a direct aluminum manufacturer in China, offering high-quality sheets with strict thickness tolerances and competitive factory prices. Tell us your required dimensions and order quantity, and our team will send you a detailed quote within 24 hours.
What Does "3003 H14" Mean?
3003 (The Alloy): This means the material is an Aluminum-Manganese (Al-Mn) alloy. By adding about 1.0% to 1.5% manganese to pure aluminum, the metal becomes roughly 20% stronger than the 1100 series pure aluminum.
H14 (The Temper): The "H" stands for strain-hardened (cold worked), meaning the metal gets its strength from being rolled at room temperature. The "1" means it is only strain-hardened without thermal treatment. The "4" indicates it is in a half-hard condition.
A half-hard temper is the sweet spot for factory fabrication. It provides enough rigidity to hold its shape as a structural panel, but it is still ductile enough to be bent 90 degrees without cracking the metal surface.
Chemical Composition of 3003 aluminum alloy
The performance of 3003 aluminum comes directly from its chemical makeup. Here is the standard chemical composition breakdown:
| Element | Content (%) |
| Aluminum (Al) | Balance |
| Manganese (Mn) | 1.0 – 1.5 |
| Copper (Cu) | 0.05 – 0.20 |
| Silicon (Si) | ≤ 0.60 |
| Iron (Fe) | ≤ 0.70 |
| Zinc (Zn) | ≤ 0.10 |
| Others | ≤ 0.15 |
The manganese content is the key factor. It boosts the material's strength while keeping the high natural corrosion resistance of pure aluminum intact.
Mechanical Properties of 3003 aluminum alloy
| Property | Value |
| Tensile Strength | 140 – 180 MPa |
| Yield Strength | ≥ 115 MPa |
| Elongation | ≥ 5% |
| Hardness (HB) | ~ 40 – 45 |
These numbers mean the sheet can handle standard mechanical pressure and impact well. It will not easily dent under light physical stress, making it ideal for outer covers and casings.
Core Advantages of 3003 H14 aluminum sheet
- Excellent Corrosion Resistance: It naturally forms an oxide layer that protects it from rust. It is perfectly safe for outdoor use, rain exposure, and contact with non-corrosive chemicals.
- Great Formability: You can easily process it through stamping presses, press brakes, and deep-drawing machines. It bends cleanly without edge splitting.
- Highly Cost-Effective: Because it does not require complex heat treatments or expensive alloying elements like magnesium (used in 5000 series), it keeps your raw material costs low.
- Good Weldability: It joins easily using standard industrial welding methods like TIG and MIG, resulting in strong and clean welded seams.
Common Applications of 3003 H14 aluminum sheet
You can find 3003 H14 aluminum sheet used in everyday industrial and commercial products. Real-world uses include:
- Construction: Metal roofing panels, corrugated exterior wall cladding, and acoustic ceilings.
- HVAC Systems: Air conditioning ductwork, heat exchangers, and ventilation grilles.
- Transportation: Aluminum diamond tread plates for truck flooring, trailer side panels, and standard fuel tanks.
- Food Industry: Kitchen utensils, industrial refrigerators, baking trays, and food storage cabinets (it is non-toxic and food safe).
- General Manufacturing: Machine safety guards, equipment enclosures, and traffic signs.
3003 H14 vs Other Common Alloys
To make sure 3003 is exactly what you need, compare it to other typical aluminum grades you might be considering.
| Alloy Grade | Strength | Corrosion Resistance | Formability | Cost | Typical Best Use |
| 1100 H14 | Low | Excellent | Excellent | Low | Chemical equipment, soft spinning |
| 3003 H14 | Medium | Excellent | Very Good | Medium | General fabrication, roofing, HVAC |
| 5052 H32 | High | Outstanding | Good | Higher | Marine environments, heavy load structures |
The Verdict: If you need to build a boat or an offshore platform, pay extra for 5052. If you need standard indoor or outdoor metal panels that are easy to work with and cheap to buy, 3003 H14 is your best option.
Standard Sizes and Specifications
When ordering from a professional aluminum supplier like GNEE, you can request standard commercial sizes or custom dimensions. Here is our general supply capability:
| Parameter | GNEE Supply Range |
| Thickness | 0.2 mm – 6.0 mm |
| Width | 500 mm – 2200 mm (Standard: 1000mm, 1220mm, 1500mm) |
| Length | 1000 mm – 6000 mm (Standard: 2000mm, 2440mm, Custom Cut) |
| Other Tempers Available | H14, H24, H18, O (Fully Soft) |
Surface Finishes Available
A plain mill finish is standard, but you can order 3003 aluminum sheets with various surface treatments to skip an extra step in your production:
- Color Coated: PE or PVDF painted for building facades and roofing.
- Embossed: Stucco or diamond patterns for anti-slip flooring or decorative refrigerator walls.
- Anodized: For enhanced surface hardness and improved appearance.
- Perforated: Punched with custom hole patterns for ventilation or decoration.
We help buyers save money by providing exact sizes, reducing your factory scrap rate. Send us your specification list today, and GNEE will provide a fast, accurate price quote, including shipping costs to your nearest port.
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Packaging and Quality Control
- Protection: Each sheet can be covered with PVC film to prevent surface scratches.
- Moisture Barrier: Wrapped tightly in waterproof kraft paper and plastic film to stop sea humidity from causing white rust.
- Palletizing: Secured on heavy-duty, fumigated wooden pallets.
- Strapping: Tied down with high-tension steel straps with edge protectors.
Quality Trust: All our materials come with an official Mill Test Certificate (MTC). We operate under ISO 9001 standards and support third-party inspections like SGS or BV before loading.
Why Choose GNEE as Your Aluminum Supplier?
Direct Factory Pricing: Cut out the middleman and lower your procurement costs.
Stable Quality: Strict thickness and flatness control means the material runs smoothly in your machines.
Reliable Delivery: Huge raw material stock allows us to process and ship your orders fast.
Global Logistics: We handle export paperwork and shipping, delivering smoothly to ports worldwide.
