Thankyou Peter, and I agree I like the technical ones too, though im building up my inventory for an upcoming pen show, so I need some pretty plain ones like these on the table too :)
Eamonn, To be honest its more of a sales thing. by machining it, it feels little different to 60601 T6, which is a general machining alloy of aluminium. Cast aluminium isn't a great comparison in any measure as pot metal is generally quite brittle, as it lacks the alloys which are generally added to aluminium which is destined to be cast
Brad I looked up the specs for Al 6061 T6 the consensus it has a high corrosion resistance and good strength. Is kerosne a good lubricant whilst turning with this one?. A mate of mine when he was apprenticed as a machinist made outside conversions for timing belt pulleys using this aluminium, it yielded a mirror finish, much admired by his customers.
My only beef with low grade aluminium it sure does not retain finish for long.
Peter.
This link might help in understanding the different Ali grades.
https://www.google.com.au/url?sa=t&...k8Qy85M5XXg2k6QWgvuPrw&bvm=bv.144686652,d.dGo