I am installing a bath tub in my 2 floor cast iron 60v 32 x 19 my floor joists are 2 x12 16 inches apart will this be sufficient?

I'm not an engineer but rehap old homes with cast iron tubs, The joist there are fine if its not sitting in the middle of the room. If its against a wall or close to the side plates the no big deal.

What's the subfloor made of and how thick?

2 sides are enclosed by weight bearing walls and sub floor is 5/8 inch plywood and cementboard.

Is this a claw foot or a reg old cast iron tub. I should have asked earlier

Yes your joists have correct size. Install the tub w/o worries.