Hi guys,
I need to turn 6mm diameter x 50 long pins from either 12.9 high tensile M8 bolts or EN24T which comes minimum 0.5" diameter in the UK.

Which is easier to machine on a manual lathe? 12.9 high tensile steel M8 bolts or EN24T 0.5" diameter rod? I have 40 to do and there is a 4.25 x 18 long shoulder on one end.

Many thanks in advance.
James