Quenching What is quenching? Quenching of steel refers to a heat treatment process where the steel is heated to the critical temperature above Ac3 (for hypo-eutectoid steel) or Ac1 (for hyper-eutectoid steel). It is held at that temperature for a certain period, causing a complete or partial transformation into austenite. Subsequently, it undergoes rapid cooling … Continue reading Common Heat Treatments: Quenching, Tempering, Normalizing, Annealing