Use a steel welding table to ground yourself from electrostatic discharge (ESD)?
Yep - I think that you will not have any ESD issues with the setup that you describe.

You may want to pick up a large sheet of conductive foam to put on top of your table for when you are working on circuit boards that might short out to the table.  We purchased a large package of high-resistivity conductive foam many years ago and are still using it for temporary table-top surfaces.  These are 3' x 4' sheets with a smooth surface that seems to wear very well.  I don't recall the exact amount of resistivity that it has but it was pretty high.

There are many grades of conductive foam available - some with low resistivity, some with high, some with a stable surface, some that starts to fall apart as soon as you look at it sideways.  But if you find the right stuff, it can make your life easier.