EntityQ1424564· pop 19· linked from 132 articleshardeningSign in to savemetalwork; metallurgical metalworking process used to increase the hardness of a metalConnectionscubic crystal systemEntityironEntitysteelEntitymetallurgyEntitycast ironEntityhardnessEntityblast furnaceEntitymetalworkingEntityBessemer processEntityDamascus steelEntitypig ironEntitytemperingEntityiron and steel industryEntitywrought ironEntityheat treatmentEntityannealingEntitytetragonal crystal systemEntityquenchingEntityopen hearth furnaceEntitynitridingEntityCategoriesMetal heat treatments