High Strength AL · 7xxx
Aluminum 7075
Aluminum 7075 is a high strength aluminum — ultimate strength, aerospace favorite. Typical values: 505 MPa yield, 2.81 g/cm³, rated to 150 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the T6 (solution heat treated, artificially aged) condition. Metric first, imperial in gray. The bars show where 7075 sits against the other 163 aluminum grades in the catalog.
Datasheet
| Yield strength | 505 MPa73 ksi |
|---|---|
| Tensile strength | 570 MPa83 ksi |
| Hardness | 150 HB |
| Density | 2.81 g/cm³0.102 lb/in³ |
| Specific strength (yield ÷ density) | 180 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 150 °C302 °F |
| Electrical conductivity | 33 % IACS19.1 MS/m |
| Machinability | Excellent85 / 100 |
| Weldability | Not recommended5 / 100 |
| Formability | Poor15 / 100 |
| ISO 513 machining group | N |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other aluminum grades
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 7075 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to 7075. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Excellent85 / 100 |
|---|---|
| ISO material group | N.2 |
| Cutting speed (rough / finish) | 280 / 340 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 0.8 / 0.4 µm |
| Hardenable after machining | No |
Sheet metal
| Formability | Not Recommend15 / 100 |
|---|---|
| Weldability | Not Recommend5 / 100 |
Conditions and tempers
How 7075 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
T6Default Solution heat treated, artificially aged (T6) | Heavy load-bearing frames, high-stress parts, precision components | 503 | 572 | 11 | 150 HB |
O Annealed (O) | Softest — parts you will bend or deep-form; not for carrying load | 103 | 228 | 16 | 60 HB |
T651 T6 + stress relieved (T651) | T6 strength in plate, stress relieved — thick parts machined without warp | 503 | 572 | 11 | 150 HB |
T73 Solution heat treated, overaged (T73) | Gives up ~10% strength for stress-corrosion immunity — 7075 fittings | 435 | 505 | 13 | 140 HB |
T7351 Overaged, stress relieved by stretching (T7351) | Stress-corrosion-immune plate — fittings under sustained load | 435 | 505 | 13 | 140 HB |
T7651 Overaged, stress relieved by stretching (T7651) | Stronger than T73, still corrosion-resistant — exfoliation-prone service | 470 | 540 | 11 | 145 HB |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on 7075, ranked by how often they make sense for this grade.
Heat treatment
| Age T6 (Aluminum) | Solution + artificial age to peak strength |
|---|---|
| Age T651 (Aluminum) | T6 + stress relief stretch (plate) |
| Full Anneal | Restore ductility; relieve residual stress; coarsen grain |
| Stress Relief | Reduce residual stress without changing structure |
| Age T73 (Aluminum) | Over-age 7000 for SCC resistance |
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| Glass Bead Blast | Blast |
| Laser Mark | Marking |
| Sand Blast | Blast |
| Vibratory Tumble | Tumble |
| CMM Inspection | Inspection |
| Masking | Masking |
| Tap After Finish | Finish Fix |
| FAI Report | Inspection |
Surface finishes for 7075
Coatings and treatments compatible with aluminum on the processes 7075 runs on. Pick them in the quote configurator or call them out on the drawing.
Passivation
- Electropolishing
Conversion Coating
- Anodizing Type II
- Chem Film (Alodine)
- Hard Anodize Type III w/ PTFE
- Hard Anodizing Type III
Plating
- Electroless Nickel (EN)
- Gold Plating
- Nickel Plating
- Silver Plating
Organic Coating
- Cerakote
- E-Coating
- Epoxy Coating
- Painting
- Powder Coating
- PTFE Coating
PVD Coating
- DLC
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Aluminum 7075 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A97075
- Aluminum Association
- AA7075
- EN / DIN / Werkstoff-Nr.
- AlZn5.5MgCuAlZnMgCu1.5AW-70753.436576528AlZn5,5MgCu
- GB (China)
- 7A09LC9
- JIS
- A7075
- Trade names
- ErgalFortalZicral
- Also called
- Aircraft Aluminum
- Other
- A-Z5GU
Stock forms
Raw-material forms FabDigit sources 7075 in, with the common sizes held in North American stock.
- Plate thickness
- 1/4"8 mm10 mm1/2"15 mm3/4"20 mm25 mm1"30 mm1.5"2"
- Sheet thickness
- 1.5 mm2 mm3 mm4 mm5 mm6 mm
- Bar diameter
- 0.500"1.000"2.000"
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.