Aluminum 7075 vs 7175
Aluminum · grade comparison
Aluminum 7075 and 7175 are both aluminum grades. 7075 is the stronger of the two: yield strength 503 MPa (73 ksi) against 455 MPa (66 ksi) for 7175, about 11% more; tensile strength follows at 572 MPa (83 ksi) vs 524 MPa (76 ksi). 7075 is harder — 150 HB against 140 HB for 7175 — which matters for wear surfaces and threads. 7175 runs hotter in service (150°C vs 120°C continuous) and 7175 conducts heat better (155 W/m·K vs 130 W/m·K).
7075Choose it when strength drives the design, or when surface hardness matters.
7175Choose it when the part sees heat.
7075 vs 7175: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 71.7 GPa10.4 Msi · Shear Modulus 26.9 GPa3.9 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33 · Elongation at Break 11% · Reduction in Area 25%
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 477°C891 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 960 J/kg·K0.23 BTU/lb·°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 Rating (AISI 1212 = 100 %)
Weldability
Brazeability / Solderability
Same in both: Machinability 78 / 100 · Formability (cold) 25 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Typical Recycled Content
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · 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 | 7075 | 7175 |
|---|---|---|
| Default condition | T6 | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | 0.8 mm | 0.5 mm |
| Best machined surface | Ra 0.8 µm | Ra 0.8 µm |
Both are offered for CNC machining and Sheet metal. Both take the same 16 finishes: Anodizing Type II, Cerakote, Chem Film (Alodine), DLC, E-Coating, Electroless Nickel (EN), Electropolishing, Epoxy Coating, Gold Plating, Hard Anodize Type III w/ PTFE, Hard Anodizing Type III, Nickel Plating and 4 more.
7075 vs 7175 — frequently asked
Is 7075 stronger than 7175?
Yes. 7075 has a typical yield strength of 503 MPa (73 ksi) against 455 MPa (66 ksi) for 7175 — about 11% more. Tensile strength is 572 MPa (83 ksi) vs 524 MPa (76 ksi).
Which is cheaper, 7075 or 7175?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, 7075 or 7175?
7075. Its weldability rates poor (18/100) against not recommended (12/100) for 7175.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7075 and 7175 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.