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        Part of Raw to Ready
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        Manganese | Raw to Ready: Mack Truck

        This clip from Raw to Ready: Mack Truck focuses on how the trench warfare of WWI and the head wounds that killed thousands of soldiers led Sir Robert Hadfield, an English metallurgist, to experiment with alloys to strengthen the brittle steel helmets of the Allied forces. Tests with manganese led to the creation of an alloy that has the ability to form without fracture and absorb kinetic energy. The new helmets saved countless lives and helped win the war. Today the same alloy is used in the immense steel rails that are the backbone of the Mack Truck.

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