I'm designing a small part, probably weights about a pound or two that needs to take some load and needs to be corrosion resistance. I was originally thinking of using stainless steel. There is a very tight budget requirement (well, which project doesn't? :lol: ). I want some feedback in terms of what to choose based on what's best for the cost. Size is not a huge problem, neither is weight. Let me know if I'm saying something that doesn't make sense, but please be nice. Here are four things I'm considering right now: 1) Use high strength stainless steel 17-4 PH (110 ksi yield strength) or something like that 2) Use regular stainless steel 304 or something like that and probably do a heat treating to make it stronger (70 ksi yield strength) 3) Design with just stainless steel 304 or something like that and scale up the part to the specific strength. 4) Using Carbon Steel (because they are cheap) and probably do some heavy plating (chrome?) for corrosion resistance The parts don't need to be welded, the main two parts are rather complicated to be made by CNC machine (it will probably waste a lot of materials 60+% also). We'll make probably about 100-200 parts (I'll probably convey the person to do 1000) and is casting my best bet (compare to machining or any other process)? Die Casting? I can probably make a two part mold to make the parts. What are my options. Any help, or any light shed will be greatly appreciated!