Fellas,
There is no such thing as a "steam card". What you are referring to is (in Oklahoma) a state certification that you must have before you can take a jobsite test. No card, no test. At least with the more reputable companies.
There has been some accurate info posted as to the test facilities and forms. As you can see there are a number of processes listed on the license form. Some inspectors will travel to a local facility, such as a Vo-Tech, and test one, a few, or several welders at that site.
The prices do vary.
This "welder certification card" is not good for boilers or pressure vessels.
HTH
Griff