6-Piece 18/10 Stainless Steel Round Plates,Dinner Plate Dish,9-Inch

What grade of stainless steel (200, 300, 0r 400 series) is this product made of?

Is it safe to use it for baking, roasting, broiling etc?

Is the inside bottom of the plate slightly raised? I am looking to replace tin pie pans that I use for dredging food.

"Microwave safe" for "stainless steel"? Seems like an odd combination.