Yes, TUNGSTENS is a Scrabble word!

Letter values in Scrabble US: T 1, U 1, N 1, G 2, S 1, T 1, E 1, N 1, S 1.

Is it a valid word?

TUNGSTENS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite

Also: w, atomic number 74.