2011 Aluminum Parts

The most machinable aluminum — fast, clean cutting with an excellent finish for high-volume turned parts.

At a glance

Stocked condition	T3 temper
Machinability	Excellent — the aluminum benchmark
Weldability	Not recommended
Corrosion resistance	Fair — coat or anodize for exposure
Hardening	Supplied at T3 temper
Density (nominal)	0.102 lb/in³
Food contact	No
Magnetic	No

2011 is aluminum's answer to 12L14: alloyed specifically to break chips and cut at screw-machine speeds with a superb as-machined finish. On quantity runs of small aluminum parts it minimizes cycle time and therefore price.

It is a machining-first grade — corrosion resistance and weldability both take a back seat, and its strength sits below 6061-T6. Where the part faces weather or welds, spend the extra cycle time on 6061.

Configure a 2011-T3 part →

Any geometry in the configurator — diameters, threads, keyseats, grooves, holes, tapers — can be machined in 2011-T3. Pick the material in the sidebar and the price updates live.

When to choose 2011-T3

Higher-quantity turned aluminum parts where cycle time drives cost.
Fine as-machined finish matters more than corrosion resistance.
Fittings, spacers, and inserts in benign environments.

Consider instead

6061 — for structural or exposed parts.
C360 brass — similar machinability with real corrosion resistance.

Typical applications

High-volume aluminum fittings
Threaded inserts and standoffs
Instrument spacers and knobs
Camera and optics hardware

Frequently Asked Questions

It is alloyed to break chips into small, manageable pieces and to cut at higher speeds with better finish — the classic screw-machine recipe. Less machine time per part means a lower price at quantity.

Its copper-rich chemistry corrodes more readily than 6061. Indoors it is fine as-machined; for outdoor or damp service either anodize it or pick 6061.

For a single part the machinability advantage barely moves the price — pick 6061 for its better all-around properties. 2011 earns its keep on multi-piece runs.

Stocked as 2011-T3. Material and condition are paired — each grade ships in one condition optimized for our process; see all grades on the materials page.