Cold Work Steel HEAT TREATMENT AISI/ASTM Annealing (Slow Cooling) Quenching Tempering (Air Cooling) Annealed (HB)-max Quenched & Tempered (Hrc) D3 830-880°C 930-980°C 150-200°C 248 61 D2 850–900°C 980-1030°C 150-200°C 248 60
