Elegance Golden Vine Hammered Round Tray, 10.75-Inch, Silver/Gold

Is it flat like tray or not? I cannot tell on this picture.

Cuuld this be used as a plate (for warm food)? Thanks.

If this is stainless steel why does it have to be hand washed? Will finish come off or is hand wash precaution for handles? Are handles brass?

Does it tarnish after while