[Aussie Mike]

I'm no FE expert but going by the width of that parting line it's definitely forged and not cast. It is a twisted forging though, if you note the parting line is along the edge of the big end throws. The crank is flat when they forge it then they heat it and twist it so the throws are in the right phases.

A lot of modern forgings are "non twist" this means the die that the stamp it into has the journals all in the right phases already. This leaves a more consistent grain flow through the forging making it stronger. The twisted forging is still much stronger than a cast crank.

Cheers