I have done more research and think the conrods could be titanium as it's much lighter 4.75 grams in titanium and 8.5 in maraging steel, The maraging steel can achieve 50 on Rockwell hardness most cranks are 40-50 so could be good for crankshafts and it might even be hard enough for camshafts...
I have posted this to show a con rod I had 3d printed as a test to see if it is viable and what forum members and engineers think of using these processes in scale engine building and also to see if I can get any advice on the next steps to produce the finished con rod and discuss other...