Current 1100 Aluminum Round Bar prices by dimension, with $/lb for cross-size comparison.
About 1100|Nearly pure aluminum (99%+). Extremely soft, gummy, and a nightmare to machine. Machinists compare it to cutting bubble gum. Produces terrible burrs, strings instead of chips, and welds itself to tooling. If you have to machine it, use razor-sharp HSS tools with high positive rake, flood coolant, and crank the SFM as high as you can. Mostly used for chemical equipment, food processing, and deep-drawn parts where corrosion resistance and formability matter more than machinability. If someone specs this for a machined part, ask if they actually need it or if
6061 would work. It almost always would.