There are some uncoated GTN-2 inserts about meant for Ali, think Iscar do one.

All the major proper brand names do specific carbide inserts meant for aluminium, its what I buy 90% of the time.

Stick with neutral it will still leave a burr and can turn up to a shoulder with it and face off to length where critical measurements needed.
The Left and Right hand have always leave a burr on finished part, more so with tubular products. RH parting off generally leaves a better finish if it doesn't flex as it cuts and bows in or out.

I've not had much success finding them myself beyond the inserts I mentioned. Can you point us at some products?

Murray

If the OP can't find aluminium specific tips to suite may I point out the I use the general purpose coated tips in my Q-cut parting tool and these are fine with aluminium alloys provided I drip in my standard 50/50 straight cutting oil/paraffin mix. This prevents a build up on the edge, which does sometimes happen with certain alloys if I cut dry.

HTH,

Rod

Presume its the GTN ish style. does my head in manufacturers calling an industry standard insert by other labelling.

Iscar do them GFN-A looking at catalogue, got plenty of GFR plus other brand names but rarely use.