If that's the case, my two grades of STEEL would be 4140PHT and 1144 or 1117. I'm just not a fan of 1018 CRS because it machines so poorly and moves so much for it's relatively weak strength, but it is cheaper than most.
My two grades of aluminum would be Microchip 2011 (for nest-free turning) and 7075 for milling and anywhere I need high strength. Only the 360 for brass, but perhaps a 964 bronze for bearings and feed nuts. In stainless steel I'd go 303 for an easy-machining austenitic and 316 for anything that needs chemical or food contact and/or welding.
In plastics, I'd have black and white acetal (Delrin) and clear polycarbonate (Lexan).
My two grades of aluminum would be Microchip 2011 (for nest-free turning) and 7075 for milling and anywhere I need high strength. Only the 360 for brass, but perhaps a 964 bronze for bearings and feed nuts. In stainless steel I'd go 303 for an easy-machining austenitic and 316 for anything that needs chemical or food contact and/or welding.
In plastics, I'd have black and white acetal (Delrin) and clear polycarbonate (Lexan).