Which material do you use?

[krv3000]

hi thers a world of pane regarding metel types grades and use as most of us this is a hobby and most of the things we will mack is for awher selves and not run for hawers at a time then ther is pepel that do ther own castings haw do they grade ther castings ? any one seen fred dibner and his wheel bering desaster
for thows that don't he got a lump of brass from a scrap yard for his wheel bering turnd out to be the rong brass and was wering his frunt axel out the only tip i can give is not to run the same metel a ganst each
other and if it dus wher out think of the fun making a new one