Distributor Gear - is this iron or steel

[Zachalanche]

Anyone out there a metallurgist? this gear is allegedly iron, but I am worried that it is steel since its all machined and there are no casting marks. I tried filing it to see how soft the material is (comparing it to two old cam shafts, one steel, one iron, also compared it to another cast gear), and I cant tell the difference. also tried smacking it with a wrench to see if it rings differently than another cast gear that I have, but its too hard to tell with it mounted on the distributor.




So? can any of you tell by the pic if this is iron or not?
Cheers.