ask aluminium Forum

Hi, bit of a noob question here. I purchased a 200x300mm 10mm aluminium sheet from my local metal supplier for the work surface on my PCB milling machine. They had to cut it from a large sheet with a saw. I expected this to be flat and the corners precise. Unfortunately, the plate was not anywhere near flat and the corners were terrible. Now I'm $70AUS out of pocket and I'm stuck with some useless aluminium.
Is it normal to have to get 10 mm aluminium sheet flattened? If so how is it usually done? Am I wasting my time and money? Should I look for another type of aluminium that is sold dead flat?

If it is aluminium sheet then my experience is that it will be reasonably flat, having been cut from a chunk it would be understandable that it would need to be squared.

If it was cut from a extruded piece then that width approx 8" or 12" depending how it was cut would not be flat at all from my experience.

You could have that piece squared up and them surfaced on a mill, this should get it pretty square and flat no bigger then it is.
Unfortunately that will likely set you back another $30-$40.

They must have charged you a minimum charge at that price.

This 10 mm aluminum sheet  can be supplied polycoated to ensure they arrive in pristine condition
There are many hundreds of types and sizes of 10 mm aluminum sheetand sheet in haomei’s stock range. For non-stock sizes, through our reserved allocation, lead times can be scheduled to meet your requirements.
haomei’s stock range of 10 mm aluminum sheet and  aluminum sheet contains numerous sizes, alloys, and tempers.