7075 is the high strength aerospace aluminum. Zinc with magnesium and copper produces strength in the T6 temper that rivals many structural steels at roughly a third of the density, which is why it dominates highly loaded airframe structure, fittings and tooling.
The trade is corrosion behaviour and weldability. T73 and T7351 overage tempers give up some strength to gain a substantial improvement in stress corrosion cracking resistance, and clad sheet adds a pure aluminum surface layer for exposed applications.
We stock 7075 as bar, plate, sheet and extrusions in T6, T651, T73 and T7351, including clad sheet, with saw cut and waterjet blanks available.
Sizes and stock
- Bar and rod 0.250" through 16" diameter
- Plate 0.250" through 12", sheet from 0.016"
- Standard and custom extruded profiles to your die print
- Tube, pipe and coil in common tempers
Processing capabilities
- Custom extrusions and profiles from your die print
- Solution treat, age and anneal to T-temper
- Waterjet, saw and CNC machined blanks
- Anodizing, chemical milling and surface finishing
Specifications
Material is released to the applicable specification with mill test reports and, on request, independent lab verification.
Why engineers specify 7075
- Highest strength commonly available aluminum structural alloy
- Excellent strength to weight for airframe and tooling
- T73 tempers available for stress corrosion resistance
- Clad sheet available for improved surface corrosion protection
Nominal chemistry
Percent by weight, nominal composition per the governing specification. The mill test report for your heat is the controlling document.
Typical mechanical properties
| Condition | Tensile strength | Yield strength | Elongation | Hardness |
|---|---|---|---|---|
| O (annealed) | ~33 ksi | ~15 ksi | ~17% | - |
| T6 / T651 | 78 ksi min | 68 ksi min | 7% min | ~150 HBW |
| T73 / T7351 | 70 ksi min | 59 ksi min | 7% min | - |
Typical published values for reference only, not for design. Properties vary with section size, product form and processing. Order to the specification and condition your drawing requires.
Typical applications
- Airframe structure, spars and fittings
- Machined aerospace hardware
- Mould and tooling plate
- High performance sporting and defense hardware
Fabrication notes
Machining
Machines rapidly with sharp, polished, high rake tooling and high surface speeds. Heat treatable alloys cut cleanest in the T temper. Thick plate benefits from stress relieved tempers to limit movement when large volumes of material are removed.
Welding
Weldability varies by series. The 5xxx and 6xxx alloys weld readily with 4043 or 5356 filler; the 2xxx and 7xxx aerospace alloys are normally joined mechanically or by friction stir and specialized processes rather than fusion welding.
Forming
Form in the annealed or freshly solution treated condition where the temper allows, then age to final strength. Bend radii should follow the temper and thickness in the governing specification.
7075 compared with similar grades
7050
Better thick section properties and stress corrosion resistance, preferred for heavy plate and forgings.
2024
Better damage tolerance and fatigue crack growth behaviour, lower static strength.
6061
Weldable and more corrosion resistant at substantially lower strength.
Designations and cross reference
- Material family
- Aluminum Alloys
- UNS number
- A97075
- Werkstoff (W.Nr)
- 3.4365
- EN designation
- EN AW-7075 / AlZn5.5MgCu
Working from an obsolete, foreign or superseded designation? Send it over and we will cross reference it to a current grade and specification.
Quality, testing and traceability
Supplied with mill test reports, temper verification, and ultrasonic inspection, conductivity, hardness and mechanical testing available on request.
We are AS9100D and ISO 9001:2015 registered. If our stock does not already carry the inspection your specification requires, we can quote the material with that work performed. More on our quality system
Available forms
7075 frequently asked questions
What is 7075?
7075 is the high strength aerospace aluminum. Zinc with magnesium and copper produces strength in the T6 temper that rivals many structural steels at roughly a third of the density, which is why it dominates highly loaded airframe structure, fittings and tooling.
What forms is 7075 available in?
We supply 7075 in bar, billet, casting, extrusion, fitting, flange, foil, forging, pipe, plate, profile, rod, sheet, strip, tube, wire. Custom sizes are converted from billet, and we can provide saw cut, waterjet or near net blanks so material arrives closer to your finished part.
What is the UNS or equivalent designation for 7075?
7075 is designated UNS A97075, Werkstoff 3.4365, EN EN AW-7075 / AlZn5.5MgCu. If your drawing calls out an obsolete or foreign designation we can cross reference it and confirm the equivalent before you order.
What specifications can 7075 be supplied to?
Commonly ordered specifications include AMS 4038, AMS 4044, AMS 4045, AMS 4046, AMS 4048, QQA-250/12. Material is released to the specification and condition on your purchase order, with mill test reports supplied as standard.
What conditions can 7075 be ordered in?
We can supply O (annealed), T6 / T651, T73 / T7351. If our stock is not already in the condition you need, we can quote it with the heat treatment performed before shipment.
Can you cut 7075 to size?
Yes. Saw cutting, waterjet, laser and shearing are available, along with trepanning, gun drilling, lathe turning and CNC machining, so you can order blanks or rough machined pieces rather than full lengths.
Do you provide test reports and additional testing on 7075?
Every order ships with mill test reports and heat traceability. If your print calls for ultrasonic inspection, penetrant dye, magnetic particle, chemical assay, micrography, hardness or mechanical testing and our stock does not already carry it, we can quote the material with that work performed.
Can 7075 be supplied to DFARS domestic melt requirements?
Tell us at quote stage if the order is DFARS or domestic melt restricted and we will confirm availability against that requirement before you commit.
What do you need to quote 7075?
Grade, form, dimensions, quantity, specification and condition, plus any testing or certification requirements and the date you need it. Send a drawing if you have one. Quotes are typically ready within 24 hours.
How does 7075 compare with 7050?
Better thick section properties and stress corrosion resistance, preferred for heavy plate and forgings.