Metal foam stops .50 caliber rounds as well as steel - at less than half the weight - finds a new study. CMFs, in addition to being lightweight, are very effective at shielding X-rays, gamma rays and neutron radiation - and can handle fire and heat twice as well as the plain metals they are made of.

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Metal foam stops .50 caliber rounds as well as steel - at less than half the weight - finds a new study. CMFs, in addition to being lightweight, are very effective at shielding X-rays, gamma rays and neutron radiation - and can handle fire and heat twice as well as the plain metals they are made of.