Class D fires involve combustible metals such as magnesium, potassium, or titanium. A special powder is used to extinguish this type of fire.
Class K are fires that occur in cooking appliances and involve combustible cooking media such as vegetable oils or animal fats.
In Europe and some other areas outside the United States, classes of fire and what is included in each class, differ somewhat from what is used in the US to define classes of fire.
