When building a cage and suspension parts for trucks, buggies, rails, etc. what type of steel should you use? A lot of people tell me to use chromoly because it's stronger and therefore you can use a thinner wall so your car will be lighter, but if you weld chromoly shouldn't you heat treat and/or stress relieve it? Just looking for some input on what to use...Thanks for any info.
Im not a welder or a metalurgist but this is what I have heard and seen.. Chromoly is stiffer than MS.. When they are both put to their limits the CM will crack whereas mild wil bend.. Also look at price.. For the cost of MS bumpers, shock hoops, cage and cup holders, you cold only get a cage out of the CM.. Finaly on welding CM care has to be taken not to over heat the welded area and cause the metal to change properties making it weaker.. Mild does not have this problem to that extent..
Then it comes down to your main concern weight.. Are you racing?? Does 15 lbs really make a differnce to what you are doing? I find it funny as h*ll that even racers spend all this money, energy and time saving weight here and there where ever they can but this 500lb guy is trying to wedge himself behind the wheel.. Not saying your lite challenged or anything [img]/wwwthreads_images/icons/wink.gif[/img] just an observation..