7055 aluminum is one of the highest-strength 7xxx series alloys, with very high zinc plus copper, magnesium, and zirconium. It was developed to exceed 7050 and 7075 in compression strength and fatigue performance, especially in thick sections, and is used for the most demanding aerospace structures. The T7751 temper provides an excellent balance of strength and corrosion resistance. Linsy supplies 7055 in plate, tube, bar, and wire with mill test certificates on every order. Composition values below follow the AA standard and should be confirmed against the mill certificate.
Available forms: plate, tube, bar / rod, wire
Common tempers: F, H112, O, T6, T651, T7451, T77, T7751
Processing support: CNC machining, laser cutting, TIG/MIG welding, anodizing, polishing, powder coating
Quality documents: MTC report with every order
7055 aluminum is one of the highest-strength 7xxx series alloys, with very high zinc plus copper, magnesium, and zirconium. It was developed to exceed 7050 and 7075 in compression strength and fatigue performance, especially in thick sections, and is used for the most demanding aerospace structures. The T7751 temper provides an excellent balance of strength and corrosion resistance. Linsy supplies 7055 in plate, tube, bar, and wire with mill test certificates on every order. Composition values below follow the AA standard and should be confirmed against the mill certificate.
Available tempers: F, O, T6, T651, T7451, H112
| Temper | Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|---|
| F, O, T6, T651, T7451, H112 | 0.5 – 200 | 500 – 2600 | 500 – 16000 (cut-to-length) |
Available tempers: T77, T7751
| Temper | Outer Diameter (mm) | Wall (mm) | Length (mm) |
|---|---|---|---|
| T77, T7751 | 6 – 300 | 0.5 – 40 | 500 – 12000 |
Available tempers: T77, T7751
| Temper | Diameter (mm) | Length (mm) |
|---|---|---|
| T77, T7751 | 3 – 300 | 500 – 12000 |
Available tempers: T77, T7751
| Diameter (mm) | Coil weight | Tolerance |
|---|---|---|
| 0.8 – 30 | Min 50 kg | ± 0.02 mm |
7055 aluminum (EN AW-7055, AlZn8MgCuZr) is supplied to common wrought-alloy specifications. Typical standards by form: ASTM B209 (sheet and plate), ASTM B221 (extruded tube, bar, and profiles), ASTM B211 (bar and rod), ASTM B247 (forging stock), and ASTM B313 (welded tube). Always confirm the exact specification and temper with our team for your order.
| Element | Percentage (%) |
|---|---|
| Si | 0.10 max |
| Fe | 0.15 max |
| Cu | 2.0 – 2.6 |
| Mn | 0.05 max |
| Mg | 1.8 – 2.3 |
| Cr | 0.04 max |
| Zn | 7.6 – 8.4 |
| Ti | 0.06 max |
| Zr | 0.08 – 0.25 |
| Others (each) | 0.05 |
| Others (total) | 0.15 |
| Al | Balance |
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Shear Strength (MPa) |
|---|---|---|---|---|
| T7751 | 570 – 600 | 520 – 550 | 10 – 12 | 150 – 340 |
| T6 / T651 | 570 – 600 | 520 – 550 | 10 – 12 | 150 – 340 |
Values are typical for the T7751 / T6 tempers. Composition was corrected to AA 7055 limits (see audit report) and must be confirmed with the mill certificate.
Exceeds 7050 and 7075 in compression and fatigue.
Holds up under cyclic load in thick sections.
Overaging balances strength and corrosion.
Supplied as machined or formed parts.
Linsy CNC-machines and laser-cuts 7055, then anodizes or paints for corrosion protection. Welding is not recommended.
Linsy is a Shenzhen-based aluminum supplier with more than 20 years of experience. Our quality system is certified to ISO 9001, ISO 14001, and ISO 45001. Every order ships with a mill test certificate (MTC). SGS third-party test reports are available on request. Typical custom lead time is 10–60 days depending on temper, size, and quantity.
For deeper reading on 7xxx selection and fabrication, see our guides on aluminum alloy selection, welding 7000-series alloys, and aircraft-grade tempers. (Internal links to be connected to published Linsy blog articles.)
Yes. 7055 is among the strongest commercial 7xxx alloys, with higher compression and fatigue strength, especially in thick sections.
T7751 offers the best balance of strength and stress-corrosion resistance.
No, it is not a welding grade; design as machined or formed parts.
Every order ships with an MTC, and SGS third-party test reports are available on request.
Custom aluminum orders typically ship in 10–60 days depending on alloy, temper, size, and quantity. Stock or standard sizes may be faster — ask our team.
Yes. Every order includes an MTC. SGS third-party test reports are available on request.
Yes. We provide CNC machining, laser cutting, welding, anodizing, polishing, and powder coating so parts can be delivered closer to finished form.
Send your alloy, temper, dimensions, quantity, and required standard. Our team will confirm availability, lead time, and pricing.
Linsy Advantages
Linsy Aluminum is a leading supplier of aluminum processing products, serving diverse industries including aerospace, general engineering, automotive, marine, shipbuilding and other specialized industrial applications.
We are committed to maintaining the highest standards of quality and environmental responsibility, as demonstrated by our certifications: ISO 9001:2008， ISO 14001:2004 and SGS.
