7075 aluminum is a high-strength heat-treatable alloy in the 7xxx Al-Zn-Mg-Cu series. T6 temper delivers tensile strength ≥540 MPa—higher than most steel alloys on a strength-to-weight basis—making 7075 the go-to aluminum for aerospace structures, precision tooling, high-performance bicycle frames, climbing equipment and sporting goods where weight and strength are critical.
Due to poor extrudability, 7075 is limited to simple cross-sections: round bars, rectangular bars, round tubes and thin-wall rectangular tubes. We supply 7075 extrusions in T6 (maximum strength) and T73/T7351 (stress-corrosion-resistant) tempers. Mill finish or anodized.
Table of Contents
- Chemical Composition
- Mechanical & Physical Properties
- 7075 Profile Specifications
- 7075 Bar Weight Chart
- Key Characteristics
- Applications
- 7075 vs 6061 vs 2024
- 7075 Aluminum Profiles Aluminum Profile Export Markets
- 7075 Standards & Equivalent Grades
- 7075 Profiles Aluminum Profile Supply & Packing
- Frequently Asked Questions
Chemical Composition
| Element | Weight % |
|---|---|
| Zinc (Zn) | 5.1 – 6.1 |
| Magnesium (Mg) | 2.1 – 2.9 |
| Copper (Cu) | 1.2 – 2.0 |
| Chromium (Cr) | 0.18 – 0.28 |
| Iron (Fe) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | ≤ 0.30 |
| Titanium (Ti) | ≤ 0.20 |
| Aluminum (Al) | Remainder |
Mechanical & Physical Properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| T6 (≤75 mm) | ≥ 540 | ≥ 485 | ≥ 7 |
| T6 (75 – 150 mm) | ≥ 525 | ≥ 460 | ≥ 7 |
| T73 (typ.) | 435 – 505 | 360 – 435 | 10 – 13 |
T73: over-aged for improved stress-corrosion resistance; lower strength than T6 but better toughness and SCC resistance.
| Property | Value |
|---|---|
| Density | 2.81 g/cm³ |
| Melting range | 477 – 635 °C |
| Thermal conductivity | 130 W/m·K (T6), 155 W/m·K (T73) |
| Electrical conductivity | 33% IACS |
| Elastic modulus | 71.7 GPa |
| CTE (20–100°C) | 23.2 × 10⁻⁶ /°C |
7075 Profile Specifications
| Application / Type | Cross-Section (mm) | Wall Thickness (mm) | Temper |
|---|---|---|---|
| Round bars | Ø10 to Ø300 mm | — | T6, T6511, T73, T7351 |
| Rectangular bars / flats | 10 – 200 mm wide × 5 – 100 mm | — | T6, T6511, T7351 |
| Square bars | 10×10 to 150×150 mm | — | T6, T6511 |
| Round tubes | Ø20 to Ø200 mm | 2 – 10 mm | T6 |
| Rectangular tubes | Limited sizes | 2 – 5 mm | T6 |
Standard extrusion profiles. Custom cross-sections, lengths and surface finishes available on request.
7075 Bar Weight Chart
| Profile | Cross-Section Area (mm²) | Weight (kg/m) | Weight per 6 m (kg) |
|---|---|---|---|
| Round bar Ø20 | 314 | 0.882 | 5.29 |
| Round bar Ø50 | 1963 | 5.516 | 33.10 |
| Round bar Ø100 | 7854 | 22.070 | 132.42 |
| Flat bar 50×10 | 500 | 1.405 | 8.43 |
| Flat bar 100×20 | 2000 | 5.620 | 33.72 |
| Square bar 50×50 | 2500 | 7.025 | 42.15 |
Weight (kg/m) = cross-section area (mm²) × density (g/cm³) ÷ 1000. Theoretical values for sharp-cornered sections; actual weight varies with corner radii and tolerance.
Key Characteristics
- Highest Strength: T6 temper delivers tensile strength ≥540 MPa, the highest of commonly available aluminum alloys
- Excellent Machinability: Machines cleanly with good surface finish; widely used for CNC-machined parts
- Anodizable: Accepts Type II and hard anodizing (Type III) for wear resistance
- Poor Weldability: Not suitable for fusion welding (hot cracking); use mechanical fasteners or adhesives
- Stress-Corrosion Risk: T6 temper susceptible to stress-corrosion cracking in marine/humid environments; use T73/T76 tempers for SCC resistance
- Limited Shapes: Poor extrudability restricts 7075 to simple cross-sections (bars, rods, simple tubes)
Applications
- Aerospace: aircraft fittings, wing ribs, fuselage frames, landing gear parts
- Tooling: jigs, fixtures, check gauges, mold components
- Sporting goods: high-end bicycle frames, trekking poles, climbing carabiners, drone frames
- Precision parts: CNC-machined components for motorsports, robotics, optics
- Defense: small arms components, vehicle armor fittings
7075 vs 6061 vs 2024
| Property | 6061-T6 | 7075-T6 | 2024-T4 |
|---|---|---|---|
| Tensile strength | ≥ 260 MPa | ≥ 540 MPa | ≥ 470 MPa |
| Machinability | Good | Excellent | Good |
| Weldability | Good | Poor | Poor |
| SCC resistance | Excellent | Poor (T6), good (T73) | Fair |
| Typical use | General structural | Aerospace, tooling, sporting | Aerospace structures |
7075: highest strength but not weldable. 6061: lower strength but weldable and more corrosion-resistant.
7075 Aluminum Profiles Aluminum Profile Export Markets
We export 7075 Aluminum Profiles aluminum profiles (also written "aluminium profiles") in standard lengths (3m, 6m) or cut-to-length on FOB, CFR and CIF terms. Main destinations and typical uses:
- Southeast Asia – Vietnam (Ho Chi Minh City, Hai Phong), Malaysia (Port Klang), Thailand (Laem Chabang), Indonesia (Jakarta, Surabaya), Philippines (Manila): aerospace component supply chain, precision CNC parts, high-end bicycle and sporting goods.
- North America – Mexico (Manzanillo, Veracruz): aerospace tier suppliers, tooling and jigs, motorsports and sporting goods.
- Middle East – UAE (Jebel Ali), Saudi Arabia (Jeddah, Dammam), Israel (Haifa, Ashdod): aerospace MRO, defense contractors, precision machining and tooling.
- Africa – Nigeria (Lagos), South Africa (Durban): aerospace supply, CNC machining, sporting goods and precision parts.
7075 Standards & Equivalent Grades
| System | Designation / Standard |
|---|---|
| AA / ASTM | 7075 (ASTM B221) |
| UNS | A97075 |
| EN | EN AW-7075 (AlZn5.5MgCu) |
| GB (China) | 7075 / 7A04 |
| JIS | A7075 |
| Extrusion standards | ASTM B221, EN 755-2 (properties), EN 755-9 / EN 12020 (tolerances), JIS H4100 |
| China standards | GB/T 6892 (industrial profiles), GB/T 5237 (architectural profiles) |
7075 Profiles Aluminum Profile Supply & Packing
- Standard Lengths: 3 meters, 6 meters, or cut-to-length up to 6m
- Custom Extrusion: Custom cross-sections, slots, holes and machining available (tooling charge applies)
- Surface Finish: Mill finish, anodized (clear, silver, black, gold, bronze), powder coated (RAL colors), electrophoresis
- Packing: Profiles wrapped in protective film, bundled with corner protectors, shrink-wrapped or in wooden crates for export
- Documents: Mill test certificate (EN 10204 3.1), certificate of origin, material compliance declaration
- MOQ: 500 kg per profile for standard extrusions; 1 – 3 tons for custom tooling orders
- Lead time: 15 – 25 days for standard profiles; 30 – 40 days for custom extrusions (including tooling)
- Terms: FOB, CFR, CIF; payment by T/T or L/C
Frequently Asked Questions
Why is 7075 not available in complex extruded shapes?
7075 has poor extrudability due to its high alloying content (Zn, Mg, Cu) and narrow extrusion temperature window. It can only be extruded into simple solid shapes (bars, rods) and thin-wall tubes. For complex profiles, use 6061 or 6082.
Can 7075 aluminum be welded?
No. 7075 is highly susceptible to hot cracking during fusion welding and cannot be reliably welded using TIG, MIG or other arc processes. Join 7075 parts using mechanical fasteners (bolts, rivets) or structural adhesives.
What is the difference between 7075-T6 and 7075-T73?
T6: solution heat treated and artificially aged for maximum strength (≥540 MPa tensile). T73: over-aged to improve stress-corrosion cracking resistance and toughness, at the cost of ~15% lower strength. Use T73 for marine or corrosive environments; T6 for dry aerospace and tooling applications.
Is 7075 suitable for saltwater / marine use?
7075-T6 is susceptible to stress-corrosion cracking in marine environments. For saltwater or high-humidity use, specify T73 or T7351 tempers, which are over-aged for SCC resistance. Alternatively, use 6061-T6 or 5083 for marine applications.
Related Grades
Standard Aluminum Profiles
Off-the-shelf angles, channels, tubes and bars for immediate delivery
2020 / 2040 T-Slot Aluminum Profiles
Lightweight T-slot extrusions for desktop machines and robotics
3030 / 3060 T-Slot Aluminum Profiles
Medium-duty T-slot extrusions for CNC tables and automation frames
45-Series T-Slot Aluminum Profiles
Heavy-duty T-slot extrusions for industrial CNC and automation
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