Not trying to sound nit-picky :) But high carbon steel doesnt get much benefit of its "spring" qualities unless its heat treated. In its annealed state it does not make a very good roll bar. Might as well use mild steel or low carbon steel. JR

Sorry JR but your not taking into acount anything I've said, I understand the class room/lab part, no low carbon steel would not be as well as high carbon steel, 1018 has a yield strength of 54,000, 1045 has 77,000 thats over 40% greater, 4140 starts at about 55,000 in it's annealed workable form, only after it has bean heat treated can it be made better than 1045 and this can vary ALOT!
So the point is here don't jump to conclutions based on what material is used and process, even a heat treated alloy sway bar can be weaker than a high carbon steel one, follow the money!

High carbon steel bars are most often manufactured in cold process as to avoid having to anneal and heat treat I keep saying it's a cost vs application issue.
If you actually want a sway bar that is better than a high carbon steel you need to buy an American made sway bar such as Hellwig not some off shore with no or false data specs.

Merry Christmas :)

No, no, no :) I am agreeing with you. Prolly doesnt sound like it but I am in agreement with all that you have said for the most part. I didnt mean to sound like I was disagreeing with you. Just trying to add to the discussion.

My only issue with the entire topic was the use of low carbon steel (1018) for a roll bar. All the rest is up for interesting discussion. Im happy to read the hows and whys of just about anything. You have some great points there..

And yes!! Merry Christmas!! I got some new socks.. Wife didnt know they were attached to some wilwood brakes but hey!!! Its all good.. JR

No problem JR, I'm just a bit puzzled because the type of steel used was not mentioned

Thats also what I was looking for..Im really interested in this bar..