Making a Steel Sphere with an Explosion

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So, usually in metalworking, you'd shape stuff by with a punch or a press. At least that's what Wikipedia says. Wikipedia also says that  hydroforming is the process of shaping metal using water pressure. For materials that are too strong or large for traditional hydroforming, one option is explosive forming, sometimes called explosive hydroforming. That's where the pressure used to shape metal comes from, you guessed it, an explosion. This ends our remedial knowledge of the complex processes involved with metalworking. Just watch the thing go bang.

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