Punti salienti
- 3003 H14 is a manganese-strengthened 3000-series alloy that forms and shapes easily while keeping good corrosion resistance.
- The H14 temper means strain-hardened (cold-worked) to about half-hard, giving moderate strength without heat treatment.
- It is non-heat-treatable, so strength comes from cold working rather than post-weld heat treatment.
- Common uses include roofing, gutters, heat exchangers, fuel tanks, and general sheet fabrication.
- Compared with 5052 it forms better; compared with 6061 it is cheaper and easier to work but offers lower strength.
Introduzione
3003 H14 aluminum is one of the most widely used general-purpose aluminum alloys. It balances moderate strength, excellent formability, and good corrosion resistance for construction, automotive, and manufacturing work.
This guide explains what 3003 H14 is, how its chemistry and H14 temper affect performance, where it is used, and how it compares with 5052 and 6061. If you need stock or cut-to-size material, see our Lega di alluminio 3003 product range.
Comprensione della lega di alluminio 3003 H14
3003 belongs to the 3000 series, where manganese is the main alloying element. The added manganese raises strength above near-pure alloys such as 1100 while keeping the alloy easy to form and weld.
The “H14” part describes the temper. In aluminum temper designations, H means strain-hardened and the following digits describe how much cold work was applied. H14 is roughly half-hard, so the material is stronger and harder than the annealed (O) condition but still easy to bend and shape.
Composizione chimica
3003 is made to standard composition limits, so quality stays consistent from batch to batch. Manganese (Mn) is the key addition at about 1.0-1.5%, and it is what lifts strength above pure aluminum. Small amounts of iron, silicon, copper, and zinc are present and affect casting, corrosion behavior, and mechanical properties.
| Elemento | Percentuale (% in peso) |
|---|---|
| Alluminio (Al) | ~98.7% |
| Manganese (Mn) | ~1.0-1.5% |
| Rame (Cu) | ≤0.20% |
| Silicio (Si) | ≤0.60% |
| Ferro (Fe) | ≤0.70% |
| Zinco (Zn) | ≤0.10% |
Proprietà e vantaggi principali
The main advantage of 3003 H14 is formability. It bends, spins, and draws well, which simplifies manufacturing and widens design choices. Because it cannot be heat-treated, its strength comes from cold working rather than heat.
It also resists corrosion well, so it suits outdoor and wet environments without extra coatings. The table below lists typical property values.
| Proprietà | Valore |
|---|---|
| Resistenza alla trazione | ~22,000 PSI (≈152 MPa) |
| Resistenza allo snervamento | ~21,000 PSI (≈145 MPa) |
| Allungamento a rottura | ~8% |
| Densità | ~2.73 g/cm³ |
| Conduttività termica | ~160 W/m·K |
| Resistenza alla corrosione | Eccellente |
Cosa significa la temperatura H14?
In aluminum, “temper” describes the condition produced by mechanical or thermal treatment. Temper codes pair a letter with digits; for the 3000 series, H tempers mean strain-hardened.
H14 means the alloy was cold-worked to about half the hardness of a fully hard H18 temper. A higher second digit means more cold work and greater strength. Knowing the temper helps engineers pick the right balance of strength and formability.
Common Applications of 3003 H14 Aluminum
Industria delle costruzioni
Construction needs light, corrosion-resistant materials, and 3003 H14 fits well. It is widely supplied as 3003 lamiera di alluminio for building and architectural work.
- Roofing and siding: low weight reduces structural load while weather resistance protects the building.
- Rain gutters and downspouts: corrosion resistance keeps them working for years with little maintenance.
- Flashing and trim: easy forming lets fabricators shape custom profiles that seal openings.
Industria automobilistica
Carmakers use 3003 H14 to cut weight without high cost. It is not as strong as 6061 or steel, but it is ideal for non-structural parts that need formability and corrosion resistance.
- Radiators and heat exchangers: good thermal conductivity and corrosion resistance suit cooling systems. Drawn Tubo tondo in alluminio 3003 is common here.
- Interior trim and moldings: light, strong, and easy to finish for decorative parts.
- Serbatoi del carburante: non-sparking behavior adds safety to fuel systems.
Industria dell'imballaggio
3003 H14 is popular in packaging because it is strong, formable, and consistent with aluminum standards. Width and thickness can be customized, so it fits many packaging needs better than carbon steel in weight-sensitive uses.
Pro e contro dell'alluminio 3003 H14
Like any engineering material, 3003 H14 has trade-offs. It forms and welds easily, resists corrosion, and has moderate tensile strength (about 20-26 ksi). The limits are low strength for highly stressed parts and no option to raise strength by heat treatment.
Comparison of 3003 with Other Aluminum Alloys
Seeing 3003 H14 next to 5052 and 6061 shows where it fits. The choice comes down to how much strength you need versus how easily the part must form.
Aluminum 3003 vs. 5052
Both 3003 and 5052 are non-heat-treatable and gain strength from cold work. 5052 adds magnesium, which gives higher tensile and yield strength, so it suits heavier-load parts. 3003 wins on formability.
| Proprietà | 3003 H14 | 5052 H32 |
|---|---|---|
| Resistenza alla trazione | 20-26 ksi | 31-38 ksi |
| Resistenza allo snervamento | 21 ksi | 28 ksi |
| Allungamento | 8% | 12% |
| Saldabilità | Buono | Buono, ma con alcune precauzioni |
| Formabilità | Eccellente | Buono |
Pick 5052 when you need more strength; pick 3003 when complex forming matters most.
Aluminum 3003 vs. 6061
6061 is heat-treatable, so it reaches higher strength (often over 40 ksi) but needs heat-treatment steps that raise cost and complexity. 3003 cannot be heat-treated, which keeps it simpler and cheaper for moderate-strength jobs.
For a deeper side-by-side, read our 3003 vs 6061 comparison. When choosing between sheet alloys, our 3104 vs 3003 vs 3004 sheet guide helps you match the alloy to the job.
Conclusione
3003 H14 is a practical general-purpose alloy, but its limits are real: it cannot be heat-treated to gain strength, so it is not the right pick for highly stressed structural parts. Sourcing it from an inconsistent supplier adds risk, since off-spec thickness or temper can fail forming and welding downstream.
Linsy Aluminum is a Shenzhen-based factory with 20+ years of experience supplying 3003 H14 plate, sheet, bar, tube, and profile. Every order ships with an MTC (Material Test Certificate), and SGS test reports are available on request. With factory-direct supply, in-house CNC machining, welding, and laser cutting, plus ISO 9001, ISO 14001, and ISO 45001 management systems, Linsy gives you consistent material and short custom lead times of 10-60 days.
Contact Linsy Aluminum today to discuss your 3003 H14 requirements and request a quote.
Domande frequenti
Qual è la differenza tra l'alluminio 1100 e l'alluminio 3003?
1100 is nearly pure aluminum, so it is softer and weaker than 3003. Adding manganese in 3003 raises strength and keeps good formability, making it more useful for fabricated parts.
Cosa distingue la 3003 H14 dalle altre leghe di alluminio?
The H14 temper means strain-hardened to about half-hard, so it is stronger than the annealed condition yet still easy to form. Its balance of formability, corrosion resistance, and moderate strength sets it apart from heat-treatable alloys like 6061.
In quali settori industriali è più comunemente utilizzato il 3003 H14?
It is common in construction (roofing, gutters, trim), automotive (radiators, trim, fuel tanks), and packaging, plus general manufacturing where formability and corrosion resistance matter more than high strength.
L'alluminio 3003 H14 può essere saldato o lavorato facilmente?
3003 H14 welds readily with standard arc welding and machines and cuts cleanly. Its non-heat-treatable nature means welded joints keep their properties without post-weld heat treatment.
