SUPERHARD METAL in 5 Seconds 😱

Added: 2026-05-25

[00:00:00]This glowing red metal is about to become insanely [music] strong in just 5 seconds through a process called induction hardening or high frequency quenching. Using only high [music] frequency electricity, the metal heats up to nearly 900° in just 3 seconds. If the entire tool becomes fully hard, [music] it can break like glass, so only the outer layer is heated and then rapidly cooled in water or oil >> [music] >> through a process called quenching. This creates an ultra hard surface while keeping the inside strong and flexible, which is why gears, [music] wrenches, and crankshafts can survive extreme pressure for years.