Introduction
Aluminium alloys are organized by a four-digit numbering system where the first digit indicates the primary alloying element. The four most commonly used wrought aluminium alloys in industry — 5052, 6061, 6063, and 7075 — each have distinct properties that make them ideal for specific applications.
This guide provides a side-by-side comparison to help you select the right aluminium grade for your project.
Series Classification
5xxx Series (Aluminium-Magnesium):
6xxx Series (Aluminium-Magnesium-Silicon):
7xxx Series (Aluminium-Zinc):
Properties Comparison
| Property | 5052-H32 | 6061-T6 | 6063-T6 | 7075-T6 |
|---|---|---|---|---|
| Tensile Strength (MPa) | 228 | 310 | 241 | 572 |
| Yield Strength (MPa) | 193 | 276 | 214 | 503 |
| Elongation (%) | 12 | 12 | 12 | 11 |
| Hardness (Brinell) | 60 | 95 | 73 | 150 |
| Density (g/cm³) | 2.68 | 2.70 | 2.69 | 2.81 |
| Machinability | Fair | Good | Fair | Good |
| Weldability | Excellent | Good | Excellent | Poor |
| Corrosion Resistance | Excellent | Good | Good | Fair |
| Cost | Low | Medium | Low-Medium | High |
Applications
Aluminium 5052:
Aluminium 6061 (Most Versatile):
Aluminium 6063 (Architectural Grade):
Aluminium 7075 (Aerospace Grade):
How to Choose the Right Grade
Choose 5052 when:
Choose 6061 when:
Choose 6063 when:
Choose 7075 when:
Starlight Tubes supplies aluminium pipes, sheets, and bars in all four grades. Contact us for specifications and pricing.
Frequently Asked Questions
Q.Which aluminium alloy is strongest?
Aluminium 7075-T6 is the strongest common aluminium alloy with a tensile strength of 572 MPa and yield strength of 503 MPa. It is used primarily in aerospace and military applications where the highest strength-to-weight ratio is required.
Q.Which aluminium grade is best for marine use?
Aluminium 5052 is the best choice for marine and saltwater environments. It has the highest corrosion resistance among common aluminium alloys, excellent weldability, and good formability. It is widely used for boat hulls, marine hardware, and fuel tanks.
Related Product Specifications
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