sˌʌm klˈæs dˈiː dɹˈaɪ pˈaʊdɚɹ ɛkstˈɪŋɡwɪʃɚz dɪzˈaɪnd fɔːɹ mˈɛɾəl fˈaɪɚz ɑːɹ ɪfˈɛktɪv, dᵻpɹˈaɪvɪŋ ðə fˈaɪɚɹ ʌv ˈɑːksɪdʒən ænd kˈuːlɪŋ ðɪ ˈælkəlˌaɪ mˈɛɾəl.
Some Class D dry powder extinguishers designed for metal fires are effective, depriving the fire of oxygen and cooling the alkali metal.