Material
Aluminum 7075 Parts
Aluminum that thinks it’s steel.
7075 is the aluminum you spec when 6061 isn’t strong enough: about 73 ksi yield in T6, approaching mild steel, at roughly a third of the weight. It’s the alloy of high-load brackets, motorsport and robotics hardware, and parts that earn their keep under stress. Send a STEP and PDF through the quote form for a quote in 24-48 hours.
Updated June 2026
Aluminum 7075
Near mild-steel strength at a third of the weight. Costs more than 6061: buy it when the load case demands it.
Typical parts
- High-load brackets
- Motorsport hardware
- Robotics arms & links
- Aerospace-style fittings
Strength is the whole point
7075 is a zinc-alloyed aluminum developed for airframes, and the numbers still impress: roughly 73 ksi yield and 83 ksi tensile in T6 (about 80% stronger than 6061) with better fatigue performance to match. Parts that bend, crack, or wallow out their bolt holes in 6061 usually stop doing so when the same geometry switches to 7075.
One honest caveat: stiffness. 7075 and 6061 have essentially the same elastic modulus, so a part that deflects too much in 6061 will deflect just as much in 7075: it simply takes more load before it permanently bends. If your problem is flex, change the geometry; if your problem is yielding or fatigue, change the alloy.
Where it earns the price
Motorsport brackets and suspension components, robotics arms and end-effectors, drone and UAV structures, lifting hardware, and weight-critical parts that would otherwise be steel. The pattern is consistent: the loads are real, every gram is counted, and the part is bolted, not welded, into the assembly. It quotes the same as any aluminum job, from one-off prototypes to repeat batches.
The fine print
7075 doesn’t fusion-weld in practice: design bolted, pinned, or press-fit joints, or use 6061 if welding is non-negotiable. Its copper content also makes it less corrosion-resistant than 6061, so outdoor and marine parts should be anodized as a rule, not an option. In thick sections under sustained stress, T6 can be vulnerable to stress-corrosion cracking; the T7351 temper trades a little strength for resistance there. Flag it if your part fits that picture.
Cost runs roughly two to three times 6061 for the material, and odd stock sizes are less commonly shelved. For a part that needs the strength, that premium is cheap insurance. For one that doesn’t, 6061 is the smarter buy.
Finishes
Type II anodize in clear or black is the standard protective callout, Type III hardcoat where surfaces slide or wear, bead blast for a uniform matte. 7075 anodizes well, though dyed colors can read slightly differently than on 6061. Note it on the print if an exact shade matters across mixed-alloy assemblies.
Questions
Before you send a job.
01 How much stronger is 7075 than 6061?
Roughly 80% higher yield strength (about 73 vs 40 ksi in T6) with better fatigue life. Stiffness is unchanged, so it resists permanent bending and cracking, not flex. A part that needs to deflect less needs different geometry, not a different aluminum.
02 Can 7075 be welded?
Not usefully, fusion welding 7075 invites cracking, and the joints can’t be trusted. Design around bolts, dowels, or press fits, or switch to 6061 where a weldment is the right construction. This is the most common reason 6061 wins a job 7075 was first specced for.
03 Does 7075 need to be anodized?
Strongly recommended for anything outside a clean indoor environment. The zinc and copper that give 7075 its strength cost it corrosion resistance, so bare parts spot and pit faster than 6061. Type II anodize is a small line item next to the material; hardcoat where parts slide or wear.
04 Is 7075 harder to machine, does that raise the price?
It cuts cleanly and holds tolerance well, so the premium isn’t about difficulty. The price difference is mostly the material itself (typically two to three times 6061) plus thinner stock availability in odd sizes. Tolerances are the usual: ±0.005 in milled, ±0.001 in on critical turned diameters, tighter on request.
05 When should I just use 6061?
When the part is welded, when corrosion resistance matters more than strength, when it’s deflection-limited (7075 won’t stiffen it), and when budget is the binding constraint. If the stress math doesn’t demand 7075, 6061 delivers most of the value at a fraction of the cost.
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