What type of fire extinguisher is best for combustible metal fires?

For combustible metal fires, the best type of extinguisher is one classified as Class D. This classification specifically addresses fires involving combustible metals such as magnesium, titanium, sodium, and potassium. Class D extinguishers use dry powder agents designed to smother and cool the burning metals effectively, preventing reactions that could cause explosive flare-ups or exacerbation of the fire.

Using the correct extinguisher is crucial because other classes, such as A, B, and C, are designed for different types of materials. Class A extinguishers target ordinary combustibles like wood or paper, Class B extinguishers are meant for flammable liquids such as gasoline or oil, and Class C extinguishers are used on electrical fires. Each of these extinguishers may not effectively suppress combustible metal fires and could even worsen the situation if used inappropriately, emphasizing the importance of understanding the correct type of extinguisher for specific fire hazards.