با دوام aisi 420 کاملا جدید
The loading–unloading curves for the AISI 420 steel normalized at 975 (a), 1025 (b), and 1075 C (c) followed by annealing at 250, 350, 450, 550, and 650 C. between 250 and 450 C heat treatment temperatures, sharply dropped, and eventually stabilized.