Aluminium 7075-T6 is the highest-strength common aluminium alloy — stronger than many steels on a weight-for-weight basis. It is the first choice when 6061 isn't strong enough and weight is a constraint that prevents stepping up to steel or titanium. Originally developed for aircraft structures in the 1940s, 7075 remains a staple of aerospace, defence, UAV, and high-performance motorsport applications. OrangeSea CNC machines 7075 daily on our 5-axis centres, holding tolerances to ±0.005 mm on critical features and supplying material certs with every aerospace order.
Technical Data
Material Properties
Capabilities
Why CNC Machine Al 7075?
Highest Strength-to-Weight
Yield strength of 503 MPa — comparable to mild steel at less than one-third the weight. The go-to for weight-critical structural parts.
Excellent Fatigue Resistance
7075-T6 outperforms 6061 significantly in fatigue cycling — essential for aerospace brackets and structural parts under vibration loading.
Good Machinability
Slightly more wear on tooling than 6061 but still machines quickly and cleanly with sharp carbide. Very good surface finish achievable.
Hard Anodise Performance
Hard anodising (Type III) on 7075 produces an extremely hard surface layer — excellent for wear surfaces and harsh environment enclosures.
Dimensional Stability
Good stability throughout the machining cycle — holds tight tolerances on complex 5-axis parts when correctly fixtured and temperature-controlled.
Full Traceability Available
We source 7075 from certified distributors with full Mill Test Reports and heat-lot traceability for aerospace and defence customers.
Use Cases
What We Machine in Al 7075
Engineering Tips
Design for Machining — Al 7075
Do NOT weld 7075 — the HAZ (heat affected zone) loses up to 50% of its strength. Use mechanical fastening or adhesive bonding instead
Specify hard anodise (Type III) if the part will see wear or harsh outdoor environments — 7075 corrodes faster than 6061 without protection
T651 temper (stress-relieved plate) is preferred for tight-tolerance parts — reduces internal stress that can cause distortion after machining
Allow for cost premium over 6061 — material is ~30–50% more expensive and slightly slower to machine
For aerospace orders, specify AMS 2770 or AMS 2750 heat treatment standard and we supply the relevant cert
Surface Options
Available Finishes
Related Materials
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Ready to Machine in Al 7075?
Upload your design files and get a detailed quote within 24 hours. Tolerances to ±0.01 mm, ships worldwide from Shenzhen.