What is the best or most common metal for furniture manufacturing applications?

Question

I need to find something relatively light, strong, easy to machine, and cheap. A product I am designing may either require a few metal bars and gears, or some heavy duty springs that would need to withstand strain from the weight of a human. I am not too good with physics, and haven't taken many specific courses in metallurgy, but I have a manufacturing education and background.

Answer 1

You can use stainless steel or aluminium or mild steel...

Answer 2

Usually steel or aluminum is used.

Aluminum is easier to machine and lighter, but steel is much stronger and tougher.

Answer 3

wrought iron

Answer 4

aluminum hands down.  cost is higher than others, but durable, malleable, corrosion resistant (powder coated, etc...)

Answer 5

steel is good