I just used up my last stock of 1.6mm thick annealed 1200 aluminum on some spinning and went to re-order.
Guess what?
You can no longer buy anything but 5000 or 3000 grade aluminum sheet in New Zealand!
I checked with all the limited number of aluminum suppliers here and
*nobody* can supply.Talking with a couple of professional metal-spinners, they confirmed the situation.
What a pain in the backside that is!
Neither 5000 series nor 3000 series sheet will spin (even when regularly annealed) to anywhere near the degree that 1000 series does so I'm stuck with looking at other options for making a new batch of venturis. It's either cut and weld (which produces sharp contours and is very time-consuming) or turn from solid which is also slow and expensive.
What is the world coming to?