Views: 0 Author: Site Editor Publish Time: 2026-03-21 Origin: Site
When buying aluminum coil, you'll see numbers like 1100, 3003, 5052, 6061. They're not random – each tells you what that alloy can do.
Pick wrong = project fails. Pick right = you're a hero. Here's the simple truth.
| Series | Main Alloy | One-Liner |
|---|---|---|
| 1xxx | 99%+ Pure Al | Super soft, conductive, can't bear load |
| 2xxx | Copper | Strong but rusts (rarely used) |
| 3xxx | Manganese | All-rounder, rustproof, most common |
| 4xxx | Silicon | Low melting point, good for welding |
| 5xxx | Magnesium | Loves salt water, high strength |
| 6xxx | Mg + Si | Heat-treatable, structural |
| 7xxx | Zinc | Ultra-strong, aerospace |
| 8xxx | Other | Specialist (foil, etc.) |
Personality: Super soft, excellent corrosion resistance, great conductivity, low strength
Uses: Chemical equipment, electrical conductors, decorative trim
Price: $ (cheapest)
Personality: Medium strength, good corrosion resistance, weldable, most widely used
Uses: Roofing, gutters, cookware, storage tanks, signs
Price: $-$$
Fun fact: Your soda can is made of 3004!
Personality: High strength, salt-water resistant, weldable
Uses: Boat hulls, fuel tanks, pressure vessels, truck bodies
Price: $$-$$$
Real story: 5052 used in Florida marina – still looked new after 5 years in salt spray.
Personality: Heat-treatable, high strength, extrudable
Secret code: 6061-T6 means heat-treated, tensile strength 310 MPa
Uses: Structural frames, bridges, window frames, bike frames
Price: $$-$$$
Personality: Great for thin gauges, cost-effective
Uses: Kitchen foil, bottle caps, pharmaceutical packaging
Price: $-$$
Fun fact: The foil wrapping your chocolate bar? Probably 8011.
| Property | 1100 | 3003 | 5052 | 6061-T6 |
|---|---|---|---|---|
| Strength | Low | Medium | High | Very High |
| Corrosion Resistance | Excellent | Very Good | Excellent | Good |
| Formability | Excellent | Very Good | Good | Fair |
| Weldability | Good | Very Good | Excellent | Good |
| Price | $ | $-$$ | $$-$$$ | $$-$$$ |
1. Wet or corrosive environment?
Yes → 5xxx (5052 for salt water, 3003 for general)
No → Keep going
2. Need high strength?
Yes → 6xxx (6061-T6) or 5xxx (5083)
No → Keep going
3. Need lots of bending?
Yes → 3xxx (3003 is your friend)
No → 1xxx might work
4. For packaging or foil?
Yes → 8xxx (8011)
| You Need | Pick This |
|---|---|
| Electrical conductivity | 1100 |
| Roofing, gutters | 3003 |
| Boat parts | 5052 |
| Structural beams | 6061-T6 |
| Kitchen foil | 8011 |
| Fuel tanks | 5052 |
| Window frames | 6063 |
| Cookware | 3003 or 5052 |
Need help picking? Send us a message for consultation!
