Aluminum 7005 vs 7A09
Aluminum · grade comparison
Aluminum 7005 and 7A09 are both aluminum grades. 7A09 is the stronger of the two: yield strength 505 MPa (73.2 ksi) against 295 MPa (42.8 ksi) for 7005, about 71% more; tensile strength follows at 570 MPa (82.7 ksi) vs 350 MPa (50.8 ksi). In exchange, 7005 is the more ductile: elongation 12% versus 8% for 7A09, and 7A09 is harder (150 HB vs 94 HB). 7005 conducts heat better (149 W/m·K vs 130 W/m·K). On the shop floor, 7A09 machines more easily (very good vs good), 7005 welds better (very good vs poor), and 7005 sits in a lower cost tier (standard, $$) than 7A09 (premium, $$$).
7005Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
7A09Choose it when strength drives the design, or when the part is machined in volume.
7005 vs 7A09: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Reduction in Area
Hardness, Rockwell B
Same in both: Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Same in both: Max Service Temperature (continuous) 120°C248 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Castability 25 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 7005 | 7A09 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | — | — |
| Relative cost | $$ Standard | $$$ Premium |
| Min. machined wall | 0.5 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Anodizing Type II | Yes | — |
| Cerakote | Yes | — |
| Chem Film (Alodine) | Yes | — |
| DLC | Yes | — |
| E-Coating | Yes | — |
| Electropolishing | Yes | — |
| Hard Anodize Type III w/ PTFE | Yes | — |
| Hard Anodizing Type III | Yes | — |
| Nickel Plating | Yes | — |
| PTFE Coating | Yes | — |
| Painting | Yes | — |
| Powder Coating | Yes | — |
They share 4 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Silver Plating.
7005 vs 7A09 — frequently asked
Is 7A09 stronger than 7005?
Yes. 7A09 has a typical yield strength of 505 MPa (73.2 ksi) against 295 MPa (42.8 ksi) for 7005 — about 71% more. Tensile strength is 570 MPa (82.7 ksi) vs 350 MPa (50.8 ksi).
Which is cheaper, 7005 or 7A09?
7005 is the lower-cost material: it sits in the standard tier ($$) while 7A09 is premium ($$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 7005 or 7A09?
7A09. Its machinability rates very good (72/100) against good (60/100) for 7005; for welding the order is 7005 first (very good, 80/100) then 7A09 (poor, 18/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7005 and 7A09 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.