Blacksmithing - Making a Sleigh Bell

Today I will try something new, quenching mild steel. Under normal circumstances, mild steel or steel with a carbon content below 0.2% or so cannot be hardened. However, if you manage to cool it faster than water normally does, it actually hardens to some degree. Here I mix up a batch of something referred to as superquench, which is a salt water solution with agents known to reduce water surface tension. You can find the complete recipe in the video description. The idea is to quote-unquote wet the steel surface more efficiently by minimizing the steam blanket formed around the hot steel, the Leidenfrost effect, thus cooling the steel much faster. Ooh, that sound! Wow, that definitely improved the hardness. Cool!