👉 Unharded, also known as uncoarse or semi-coarse, is a type of hardening process where a material is hardened without the use of heat. This process occurs when an alloy or metal is subjected to an external force, such as high temperatures or pressure, and the materials becomes more dense and harder than its original composition. The unharded state can be achieved by various means, including chemical, mechanical, or physical processes. In the context of engineering, unharded metals
