In a lot of cases, the limitation will be based on machinery limitations at the shop, and that varies from shop to shop.
You'll have some limitations based on impact tests required, impact test exemptions, etc.
If I remember right, the A516 specification has a maximum thickness of 8" or so.
Anyway, when you get into stuff like that, the challenge becomes paying for it rather than doing it.
Quote from a fabricator's website:
"The narrower the width of the plate entering the machine, the thicker the plate that can be rolled. For example, CMRP can roll a 2" thick, 12' wide steel plate, or we can roll a 12" thick, 3' wide steel plate. We can also roll thick material to very tight diameters—for example, 2" thick, 10" wide material can be rolled to a 19" diameter..."- this from
Chicago Metal Rolled Products offers full service steel plate rolling & heavy plate rolling for all applications. Contact us for your custom plate rolling project.
www.cmrp.com
If you're contemplating something like that, get your fabricator/designer involved sooner rather than later.
If you can furnish more information, you're likely to get better answers.