Summer 2022 Published June 20, 2022 By Sue Hill Material Calendar April 2022: 17-4 Stainless SteelMay 2022: 17-4 Stainless SteelJune 2022: 17-4 Stainless SteelJuly 2022: L-40 Maraging SteelAugust 2022: L-40 Maraging Steel