SD-card isn't recognized by phone/PC. Is it completely dead?

Hi, i have 16gb sdcard in my phone mounted (or formated) as internal storage.

After 4 months, my phone went crazy and i have to re-flash android.

But, when i flashed new android and connected the sdcard to the phone, the card needed to be formated. I tried several programs on pc, tried several phones but nothing can restore my card. I had on that card all my images/files. Some ideas how can i restore it? Is it completely dead?

//During re-flashing, that sd-card wasn't in the phone//

Thanks